Abstract: The present invention is a 1,3,8 substituted xanthine derivative of formula I or a pharmaceutically acceptable salt thereof, wherein R1, R2 and R3 are as defined in the specification. Compounds of formula I and pharmaceutically acceptable salts or prodrugs thereof show activity as modulators of gluconeogenesis.

Abstract: Disclosed are processes for the synthesis of novel compounds that are A2B adenosine receptor antagonists, having the structure of Formula I or Formula II: by cyclizing a compound of the formula (3):

Abstract: Disclosed are methods for making novel A2B adenosine receptor antagonists having the structure of formula I or Formula II: The compounds are particularly useful for treating asthma, inflammatory gastrointestinal tract disorders, cardiovascular diseases, neurological disorders, and diseases related to undesirable angiogenesis.

Abstract: A process for preparing xanthine phosphodiesterase V inhibitors, and compounds utilized in said process.

Abstract: The present invention provides novel compounds exhibiting an excellent DPPIV inhibition effect. The compounds are represented by the formula: wherein, m is 0 or 1; n is 0; R31, R32, R33, R34, R35, R36, R37, R38, R39, R40, R41, and R42 each represent a hydrogen atom; X represents an alkynyl group, an aryl group, and such, which group may be substituted; and, R1 and R2 each independently represents a hydrogen atom, an alkyl group, an alkoxyl group, or such, or salts or hydrates thereof.

Abstract: Disclosed are compounds having selective hydrolytic potential. The disclosed compounds are useful as compounds having selective stability and are capable of undergoing programmed hydrolysis in biologic systems.

Abstract: A condensed purine derivative represented by Formula (I): wherein X—Y-Z represents R1N—C?O or N?C—W, R2 represents a hydrogen atom, a substituted or unsubstituted lower alkyl group, a substituted or unsubstituted aralkyl group, a substituted or unsubstituted aryl group, a substituted or unsubstituted aromatic heterocyclic group, a substituted or unsubstituted alicyclic heterocyclic group or the like, n represents an integer of from 0 to 3, V1 represents a hydrogen atom, a substituted or unsubstituted lower alkyl group, a substituted or unsubstituted aralkyl group, a substituted or unsubstituted aryl group, or a substituted or unsubstituted aromatic heterocyclic group, V2 represents a substituted lower alkyl group or a substituted or unsubstituted aromatic heterocyclic group, and when V1 represents a hydrogen atom, a lower alkyl group, a substituted or unsubstituted aralkyl group, or a substituted or unsubstituted aryl group, and for example, X—Y-Z represents R1aN—C?O and R2 represents a substituted lower

Abstract: A method for the prophylaxis of an inflammatory condition or immune disorder associated with infiltration of leukocytes into inflamed tissue in a subject in need thereof, which method comprises administering to the subject a therapeutically effective amount of a compound of formula (I) or a solvate thereof wherein: X is —O— or —NH—; Q is (—CH2—)p, (—CH?CH—)p, (—C?C—)p where p is an integer of from 0 to 4; R1 is hydrogen or methyl; R2 and R3 independently represent O or S; n is an integer of 1 to 50; and R is hydrogen or methyl.

Abstract: The present invention relates to a new method for the synthesis of purine LNA (Locked Nucleic Acid) analogues which provides a higher overall yield. The method comprising a regioselective 9-N purine glycosylation reaction followed by a one-pot nucleophilic aromatic substitution reaction of the 6-substituent in the purine ring and simultaneous nucleophile-induced intramolecular ring closure of the C-branched carbohydrate to form novel purine LNA analogues. The novel strategy is illustrated by the synthesis of the novel compound (1S,3R,4R,7S)-7-benzyloxy-1-methanesulfonylmethyl-3-(guanin-9-yl)-2,5-dioxabicyclo[2.2.1]heptane which is easily converted into (1S,3R,4R,7S)-7-hydroxy-1-hydroxymethyl-3-((2-N-isobutyrylguanin-9-yl)-2,5-dioxabicyclo[2.2.1]heptane after isobutyryl protection of the 2-amino purine group and subsequent substitution of 1-methanesulfonyl with benzoate, debenzoylation and debenzylation.

Abstract: Disclosed are novel A2B adenosine receptor antagonists having the structure of Formula I or Formula II: The compounds are particularly useful for treating asthma, inflammatory gastrointestinal tract disorders, cardiovascular diseases, neurological disorders, and diseases related to undesirable angiogenesis.

Abstract: Compounds which mimic the secondary structure of helical regions of biologically active peptides and proteins having the following structure: including pharmaceutically acceptable salts and stereoisomers thereof, wherein Y, A, B, R1 and R2 are as defined herein. Such compounds have utility over a wide range of applications, including use as diagnostic and therapeutic agents. In particular, compounds of this invention, and pharmaceutical compositions containing the same, are neurokinin (tachykinin) antagonists. Libaries contaning the compounds of this invention are also disclosed, as well as methods for screening such libaries identify biologically active members.

Abstract: Compounds or their salts having general formulas (I) and (II): wherein s is an integer equal to 1 or 2, A is the radical of a drug that satisfies certain pharmacological tests, C and C1 are bivalent radicals, and precursors of the radicals B and B1 satisfy certain pharmacological tests.

Abstract: Disclosed are novel A2B adenosine receptor antagonists compounds having the structure of Formula I or Formula II: The compounds are particularly useful for treating asthma, inflammatory gastrointestinal tract disorders, cardiovascular diseases, neurological disorders, and diseases related to undesirable angiogenesis.

Abstract: Disclosed are compounds having selective hydrolytic potential. The disclosed compounds are useful as compounds having selective stability and are capable of undergoing programmed hydrolysis in biologic systems.

Abstract: Purine derivatives represented by the following formula and salts thereof: wherein R1 represents a C1-C4 alkyl group or difluoromethyl group; R2 represents tetrahydrofuranyl group, a C1-C7 alkyl group and the like; X represents hydrogen atom, a halogen atom or nitro group; and A represents a group represented by the following formula: wherein R3 represents hydrogen atom, a halogen atom and the like; R4 and R5 represent hydrogen atom, a halogen atom, a C1-C4 alkyl group, a C1-C4 alkoxyl group and the like, which are useful as active ingredients of medicaments such as antiasthmatic agents.

Abstract: The present invention relates to substituted xanthines of general formula 1

Abstract: The present invention relates to compounds of the formulae I and Ia in which X, Y, W, Wa, G and Ga have the meanings given in the patent claims, and their physiologically tolerable salts and their prodrugs, their preparation, their use, in particular as pharmaceutical active compounds, and pharmaceutical preparations comprising them. The compounds of the formula I are vitronectin receptor antagonists and can be employed, for example, as inhibitors of bone resorption and for the treatment of osteoporosis.

Abstract: The present invention is a 1,3,8 substituted xanthine derivative of formula I 1

Abstract: A process for preparing xanthine phosphodiesterase V inhibitors, and compounds utilized in said process. The process includes a five-step methodology for efficient synthesis of Compound 5 without intermediate purifications or separations, a dihalogenation step to synthesize Compound 7, and a coupling reaction to produce Compound 9.

Abstract: The invention is based on the discovery that compounds of Formula I are unexpectedly highly potent and selective inhibitors of the adenosine A1 receptor. Adenosine A1 antagonists can be usefull in the prevention and/or treatment of numerous diseases, including cardiac and circulatory disorders, degenerative disorders of the central nervous system, respiratory disorders, and many diseases for which diuretic treatment is suitable. In one embodiment, the invention features a compound of formula I: wherein: R3 is an optionally substituted bicyclic, tricylic, or pentacyclic group selected from:  and wherein R1, R2, R6, X1, X2, and Z are as described in the specification.

Abstract: The present invention relates to novel compounds of formula (I): wherein Z represents a 5 or 6 membered cycloalkyl, aryl, substituted cycloalkyl, or substituted aryl, said cycloalkyl, aryl, substituted cycloalkyl or substituted aryl optionally containing one or more heteroatoms selected from 0, N or S; k represents 0 or 1; n represents an integer of 1 to 50; X represents —O—, —N(H)—, —N(C1-6alkyl)-, —N(C3-8cycloalkyl)-, —N(C1-8alkyl)(C3-8 cycloalkyl), —N[(CH2CH2O)m(C1-12 alkyl, aryl, or aralkyl)]-, —CH2O—, —CH2NH—, —CH2N(C1-6alkyl)-, —CH2N(C3-8cycloalkyl)-, or —C1-12alkyl-; Q represents (—CH2)p, (—CH═CH—)p, (—C≡C—)p, (—(O)p1CH2—)p or (—CH2(O)p1)p R6 and R7 independently represent O or S; and all other variables are as defined herein; processes for their preparation, pharmaceutical formulations containing them, and their use in me

Abstract: The invention is based on the discovery that compounds of Formula I are unexpectedly highly potent and selective inhibitors of the adenosine A1 receptor. Adenosine A1 antagonists can be useful in the prevention and/or treatment of numerous diseases, including cardiac and circulatory disorders, degenerative disorders of the central nervous system, respiratory disorders, and many diseases for which diuretic treatment is suitable. In one embodiment, the invention features a compound of formula I: R3 is an optionally substituted group selected from: and wherein X1, X2, Z, R1, R2, and R6 are as described in the specification.

Abstract: Disclosed are novel nitrile compounds of formula (I) further defined herein, which compounds are useful as reversible inhibitors of cysteine proteases such as cathepsin K, S, F, L and B. These compounds are useful for treating diseases and pathological conditions exacerbated by these proteases such as, but not limited to, osteoporosis, rheumatoid arthritis, multiple sclerosis, asthma and other autoimmune diseases, Alzheimer's disease, atherosclerosis. Also disclosed are processes for making such novel compounds.

Abstract: The present invention provides compounds having the formula I: X is (C1-C8)alkylene, (C2-C8)alkenylene, (C2-C8)alkynylene, wherein one of the carbon atoms in the alkylene, alkenylene or alkynylene groups is optionally replaced with a group having the formula —O—, —N(R4)C(O)—, —OC(O—, S—, —S(O)—or —SO2—, or a pharmaceutically acceptable salt thereof and pharmaceutical compositions comprising compounds having the formula I. The compounds of the invention are selective antagonists of A2B adenosine receptors (ARs). These compounds and compositions are useful as pharmaceutical agents for treatment of diseases that are mediated by A2B adenosine receptors.

Abstract: Processes for the preparation of 1,3-oxathiolane nucleosides are provided that include efficient methods for the preparation of the 1,3-oxathiolane ring and subsequent condensation of the 1,3-oxathiolane with a pyrimidine or purine base. Using the processes described herein, the compounds can be provided as isolated enantiomers.

Abstract: Selective MMP-13 inhibitors are fused pyrimidinones of the formula 1

Abstract: A compound useful as an A1 adenosine receptor antagonist has the formula: wherein R1 is selected from the group consisting of C1-C8 alkyl; R2 is of the formula: R3 is of the formula: —(CH2)qC6H4—R7 R4 is of the formula:

Abstract: A compound useful as an A1 adenosine receptor antagonist has the formula: wherein R1 is selected from the group consisting of C1-C8 alkyl; R2 is of the formula:  wherein is an integer ranging from 1 to 8; R5 is H or (CH2)p, wherein p is an integer ranging from 1 to 8 and R6 is H or (CH2)mOH, wherein m is an integer ranging from 1 to 8; R3 is of the formula: —(CH2)qC6H4—R7  wherein q is an integer ranging from 1 to 8; and wherein R7 is selected from the group consisting of H, NH2, (CH2)tOH, wherein t is an integer ranging from 1 to 8; and R9COOH, wherein R9 is an alkyl or alkylidene group having 1 to 8 carbon atoms; and R4 is of the formula:  wherein Rs is selected from the group consisting of H; NH2; (CH2)rOH, wherein s is an integer ranging from 1 to 8; and R10COOH wherein R10 is an alkyl or alkylidene group having 1 to 8 carbon atoms; and r is an integer ranging from 1 to 8.

Abstract: A purine derivative or analogue comprises a 9-atom bicyclic moiety, moiety A, linked through a linker L to a moiety B, where B is a carboxylic acid, a carboxylic acid ester, or a moiety of the structure N(Y1)—D, where Y1 can be one of a variety of substituents, including hydrogen or alkyl, and D is a moiety that enhances the pharmacological effects, promotes absorption or blood-brain barrier penetration of the derivative or analogue. The moiety A has a six-membered ring fused to a five-membered ring. The moiety A can have one, two, or three nitrogen atoms in the five membered ring and has two nitrogen atoms in the six-membered ring. The moiety A can be a purine moiety. The moiety B can be one of a variety of moieties, including moieties having nootropic activity or other biological or physiological activity.

Abstract: The invention provides a processes for the preparation of a compound of Formula I, or a salt thereof wherein PG is a urethane- or trityl-type protective group; X is NH, O, or S; Y is CH2, O, or NH; and B′ is a base customary in nucleotide chemistry. The processes include reacting a compound of Formula (II) with a compound of Formula (III) a compound of Formula (V) B′—CH2—CO—R2  (V), a monohaloacetic acid derivative in a suitable solvent with an auxiliary base, or a compound of Formula (VII) B′—CH2—CO—R3  (VII), and converting the resulting compounds to that of Formula I.

Abstract: Described are compounds and a method of inhibiting epidermal growth factor receptor tyrosine kinase by treating, with an effective inhibiting amount, a mammal, in need thereof, a compound of Formula II: where: one of A or E is nitrogen, with remaining atoms carbon; X=O, S, NH or NR7, such that R7=lower alkyl (1-4 carbon atoms), OH, NH2, lower alkoxy (1-4 carbon atoms) or lower monoalkylamino (1-4 carbon atoms). Other terms are described in the specification.

Abstract: The present invention provides a compound of formula (I) or a solvate thereof wherein: X is —O— or —NH—; Q is (—CH2—)p, (—CH═CH—)p, (—C≡C—)p where p is an integer of from 0 to 4; R1 is hydrogen or methyl; R2 and R3 independently represent O or S n is an integer of 1 to 50; and R is hydrogen or methyl. The present invention also provides pharmaceutical compositions and methods of treatment using the compounds of formula (I).

Abstract: Disclosed are compounds of the formula: wherein R3, R6a, R6b and R8 are substituted as disclosed herein. The compounds are effective in effecting PDE IV inhibition in patients in need thereof.

Abstract: The present invention provides a compound of formula (I) or a solvate thereof wherein: X is —O— or —NH—; Q is (—CH2—)p, (—CH═CH—)p, (—C≡C—)p where p is an integer of from 0 to 4; R1 is hydrogen or methyl; R2 and R3 independently represent O or S n is an integer of 1 to 50; and R is hydrogen or methyl. The present invention also provides pharmaceutical compositions and methods of treatment using the compounds of formula (I). The compounds of the present invention are useful for the prophylaxis and treatment of septic shock, inflammatory conditions and immune disorders.

Abstract: Mixtures of chemical compounds are provided having antibacterial and other utility. The mixtures are formed, preferably in solution phase, from the reaction of a purine or pyrimiding heterocyclic scaffold with a set of related chemical substituients, optionally through employment of a tether moiety. Libraries formed in accordance with the invention have utility per se and are articles of commerce. They can be used to screen for pesticides, drugs and other biologically active compounds.

Abstract: This invention relates generally to benzocycle-substituted pyrimidines and triazines and the use thereof to protect against degradation by environmental forces, inclusive of ultraviolet light, actinic radiation, oxidation, moisture, atmospheric pollutants and combinations thereof. The new class of benzocycle-substituted pyrimidines and triazines comprises a benzocycle attached to the triazine or pyrimidine ring, and preferably an additional aryl ring containing a hydroxyl group, either free or blocked to form a latent stabilizer, ortho- to the point of attachment to the triazine or pyrimidine ring. These materials may, under the appropriate circumstances, be bonded to formulations comprising coatings, polymers, resins, organic compounds and the like via reaction of the bondable functionality with the materials of the formulation. A method for stabilizing a material by incorporating such benzocycle-substituted pyrimidines and triazines is also disclosed.

Abstract: A compound of the formula: wherein R3 represent a C1-8 alkyl which is unbranched or branched and unsubstituted or substituted with OH, alkoxy, CO2H, ═NOH, ═NOCONH2, or ═O; C3-8 cycloalkyl which is unsubstituted or substituted with OH, alkoxy, CO2H, ═NOH, ═NOCONH2, or ═O; C4-8 cycloalkylalkyl wherein the cycloalkyl portion is unsubstituted or substituted with OH, alkoxy, CO2H, ═NOH, ═NOCONH2, or ═O; aryl which is unsubstituted or substituted with Cl, NH2, alkylamino, dialkylamino, amido, C1-C8 alkylamido, C1-C3 dialkylamido, OH, alkoxy, HC═NOH, HC═NOCONH2, C1-C3 alkyl, phenyl or benzyl; aralkyl (C1-4); heterocyclyl; heterocyclylalkyl (C1-C4); and heteroaryl; R8 represents H or a C1-8 alkyl which is unbranched or branched and unsubstituted or substituted with OH, alkoxy, CO2H, ═NOH, ═NOCONH2, or ═O; C3-8 cycloalkyl which is unsubstituted or substituted with OH, alkoxy, CO2H, ═NOH, ═NOCONH2, or ═O; C4-8 cyclo

Abstract: Novel compounds and pharmaceutical compositions thereof, and methods of using same in treating anxiety, depression, and other psychiatric and neurological disorders. The novel compounds provided by this invention are those of the following formulae: wherein R1, R13, X, Y, Z, G and Q are as defined herein.

Abstract: A process for preparing 7-benzylpurine derivatives is provided. An acetylpurine nucleoside is reacted with a benzyl halide to benzylate the 7-position of the purine base, and an acid is then added to the reaction mixture to hydrolyze the glycoside bond. The 7-benzylpurines may be used to prepare 9-substituted purine derivatives.

Abstract: With the above and other objects in view, the present invention comprises compounds having the general formula (I): wherein: R1 is a C2-8 alkyl, C2-8 alkenyl, C2-8 alkynyl, C3-8 cycloalkyl, C3-8 cycloalkenyl or cycloalkynyl, wherein said alkyl, alkenyl, alkynyl, cycloalkyl, cycloalkenyl or cycloalkynyl is optionally substituted with hydroxy, C1-5 alkoxy, C3-5 cycloalkoxy, halogen, oxo, carbamido, hydroxycarbamido, oximido, C1-5 alkyloximido, C3-5 cycloalkyloximido, C1-5 acyloximido or C3-5 cycloacyloximido; Q is methylene or ethylene; R3 is aryl or heteroaryl wherein said aryl or heteroaryl has one to three substituents selected from the group consisting of C1-6 alkyl, C2-6 alkenyl, C2-6 alkynyl, C3-6 cycloalkyl, C3-6 cycloalkenyl, cycloalkynyl, C3-5 alkylene, C3-5 cycloalkylene, haloC1-6 alkyl, haloC1-6 cycloalkyl, hydroxy, C1-5 alkoxy, C3-5 cycloalkoxy, C1-2 alkylenedioxy, C1-6 acyl, C3-6 cycloacyl, C1-6 acyloxy, C3-6 cycloacyloxy, halogen, nitro or cyano; R8 is C1-5 alkyl or C3-5 cycl

Abstract: Purine derivatives in which a desired substituent is introduced into the 9-position only are synthesized by first introducing an easily-removable substituent in the 7-position of a purine base of natural purine nucleosides obtained through fermentation or derivatives thereof, then hydrolyzing the ribose moiety to form purine derivatives having the substituent in the 7-position, subsequently introducing the desired substituent in the 9-position, and then removing the substituent in the 7-position.

Abstract: Compounds of the formula R1 and R2 are independently alkyl of 1 to 6 carbon atoms, allyl, or substituted allyl of 3 to 6 carbon atoms; R3 is hydrogen, alkyl of 1 to 6 carbon atoms, or cycloalkyl of 3 to 10 carbon atoms; and R4 is phenyl or naphthyl substituted with alkyl of 1 to 6 carbon atoms, alkoxy of 1 to 6 carbon atoms or NR5R6; substituted or unsubstituted phenylalkyl wherein the alkyl group contains 1 to 6 carbon atoms; substituted or unsubstituted 5 to 10 membered heteroaryl having 1 to 3 heteroatoms selected from N, S and O; substituted or unsubstituted cycloalkyl of 3 to 10 carbon atoms; or substituted or unsubstituted cycloalkylalkyl of 4 to 10 carbon atoms; provided that phenyl or naphthyl is substituted with NR5R6 when R1 and R2 is alkyl, are useful in the treatment of various disorders associated bone loss by increased transcription and elevation of plasma calcitonin levels.

Abstract: Asymmetrically substituted xanthine derivatives having adenosine A1 antagonistic activity. These are useful as pharmaceuticals. Exemplary are: (a) 3-(2-(2-acetyloxyethyl)sulphonylethyl)-8-(1-noradamantyl)-1-n-propyl-xanthine; (b) 3-(2-(hydroxyethyl)sulphonylethyl)-8-(1-noradamantyl)-1-n-propyl-xanthine; and, (c) 3-(2-(carbamoylethyl)-8-(1-noradanantyl)-1-n-propyl-xanthine.

Abstract: Disclosed are processes for preparing compounds of the formula (I) and pharmaceutically acceptable salts or esters thereof: wherein R2 is a purine or pyrimidine base or an analogue or derivative thereof; and Z is S, S═O or SO2. The invention also relates to intermediates of use in the preparation of these compounds.

Abstract: The subject invention concerns a compound of the formula (i): ##STR1## in which Q represents heteroaryl or heterocyclo optionally substituted with one or more substituents selected from the group consisting of C.sub.1-6 alkyl (optionally substituted with one or more halogens), C.sub.1-6 alkyl--S(O)n-- (where n is 0, 1 or 2), --CO.sub.2 H (or C.sub.1-6 alkyl esters thereof or C.sub.1-6 alkyl amides thereof), halogen, C.sub.1-6 alkoxy, CN, NO.sub.2 and NR.sub.7 R.sub.8;R.sub.1 -R.sub.5, which may be the same or different, each represent C.sub.1-6 alkyl (optionally substituted with one or more halogens), C.sub.1-6 alkyl--S(O)n-- (where n is 0, 1 or 2), --CO.sub.2 H (or C.sub.1-16 alkyl esters thereof or C.sub.1-6 alkyl amides thereof), halogen, C.sub.1-6 alkoxy, CN, NO.sub.2, NR.sub.7 R.sub.8 or H (provided R.sub.1 -R.sub.6 are not all H simultaneously);R.sub.6 represents H, C.sub.1-6 alkyl, --CO.sub.2 H (or C.sub.1-6 alkyl esters thereof or C.sub.1-6 alkyl amides thereof), --CN, C.sub.

Abstract: A compound useful as an A.sub.1 adenosine receptor antagonist has the formula: ##STR1## wherein R.sub.1 is selected from the group consisting of C.sub.1 -C.sub.8 alkyl;R.sub.2 is of the formula: ##STR2## wherein n is an integer ranging from 1 to 8; R.sub.5 is H or (CH.sub.2).sub.p, wherein p is an integer ranging from 1 to 8; and R.sub.6 is H or (CH.sub.2).sub.m OH, wherein m is an integer ranging from 1 to 8;R.sub.3 is of the formula:--(CH.sub.2).sub.q C.sub.6 H.sub.4 --R.sub.7wherein q is an integer ranging from 1 to 8; and wherein R.sub.7 is selected from the group consisting of H, NH.sub.2, (CH.sub.2).sub.t OH, wherein t is an integer ranging from 1 to 8; and R.sub.9 COOH, wherein R.sub.9 is an alkyl or alkylidene group having 1 to 8 carbon atoms; andR.sub.4 is of the formula: ##STR3## wherein R.sub.8 is selected from the group consisting of H; NH.sub.2 ; (CH.sub.2).sub.s OH, wherein s is an integer ranging from 1 to 8; and R.sub.10 COOH, wherein R.sub.

Abstract: Compounds and pharmaceutical compositions, including resolved enantiomers and/or diastereomers, hydrates, salts, solvates and mixtures thereof, have the formula:CORE MOIETY--(R).sub.jIn these compounds, j is an integer from one to three; the core moiety is a cyclic core, the cyclic core being non-cyclic or at least one five- to seven-member non-heterocyclic ring or heterocycle; and R is selected from the group consisting of amine, hydrogen, halogen, hydroxyl, substituted or unsubstituted C.sub.(1-10) alkyl, C.sub.(2-10) alkenyl, cyclic or heterocyclic group or formula I. At least one R having formula I: ##STR1## In formula I, n is an integer from four to twenty; and each R.sub.1 or R.sub.2 is independently hydrogen, substituted or unsubstituted C.sub.(1-20) alkyl, C.sub.(1-20) alkoxyl, C.sub.(2-20) alkenyl or cyclic or heterocyclic group.

Abstract: Therapeutic compounds with at least one carboxylic acid, ester or amide-substituted side chain have the formula:CORE MOIETY --(R).sub.jwherein j is an integer from one to three. The core moiety is non-cyclic or cyclic (carbocyclic or heterocyclic). R may be selected from among hydrogen, halogen, hydroxyl, amino, substituted or unsubstituted C.sub.(1-10) alkyl, C.sub.(2-10) alkenyl, carbocyclic or heterocyclic groups and at least one R has the formula I: ##STR1## wherein: one or two p are the integer one, otherwise p is two; and n is an integer from three to twenty; R.sub.1 is selected from the group consisting of substituted and unsubstituted CH.sub.2 ; NR.sub.3, R.sub.3 being hydrogen, substituted or unsubstituted C.sub.(1-20) alkyl, C.sub.(1-20) alkoxyl, C.sub.(2-20) alkenyl or C.sub.(1-20) hydroxyalkyl, or carbocyclic or heterocyclic group; O; --CHR.sub.4 O--, R.sub.4 being substituted or unsubstituted C.sub.(1-20) alkyl, C.sub.(1-20) alkoxyl, C.sub.(2-20) alkenyl, C.sub.(1-20) hydroxyalkyl, or R.sub.

Abstract: Disclosed are compounds having the formulae: ##STR1## wherein: Q.sub.3,Q.sub.6a,Q.sub.6b and Q.sub.8 are independently a bond, C.sub.1-8 alkylene, C.sub.2-8 alkenylene and C.sub.2-6 alkynylene, andR.sub.3, R.sub.6a, R.sub.6b, and R.sub.8 are independently hydrogen, aryl or heteroaryl, optionally substituted by halogen, hydroxy, alkoxy, nitro, cyano and carboxy, provided that:Q.sub.3 R.sub.3 is not hydrogen or methyl in formulae (I) or (II); and at least one of R.sub.3 and R.sub.8 is aryl or heteroaryl in formula (I).The compounds are effective PDE IV inhibitors and possess improved PDE IV inhibition and improved selectivity with regard to PDE III inhibition.

Abstract: 9-Substituted purine derivatives of formula (4) ##STR1## are prepared by debenzylating a compound of formula (3): ##STR2##