Abstract: Derivatives of 9-deazaguanine are prepared by reacting an aldehyde or ketone with a dialkylaminomalonate to form the corresponding enamine. The enamine is then reacted with a base to form a cyclic pyrrole. The cyclic pyrrole is reacted with an urea compound or a derivative of carbamimidoic acid to provide a protected guanidino compound. The guanidino is converted to the desired 9-deazaguanine derivative by reacting with trifluoracetic acid or with an alkoxide or hydroxide followed by neutralization with an acid.

Abstract: 1

Abstract: Provided are compounds represented by: 1

Abstract: 4-Oxo-4,5-dihydro-3H-pyrrolo[3,2-d] pyrimidine-7-carboxylic acid methyl ester and process for preparing are provided. The 4-oxo-4,5-dihydro-3H-pyrrole[3,2-d] pyrimidine-7-carboxylic acid methyl ester is useful as a precursor for providing 9-deaza-hypoxanthine, a key intermediate for producing certain PNP inhibitors.

Abstract: A method for preparing 1-C-(9-deazaaden-9-yl)-1,4-imino-D-5′-deoxy-5′-methylthiorbitol) and pharmaceutically acceptable salts thereof is provided.

Abstract: Compounds of formula (I) are useful as inhibitors of trypsin like serine protease enzymes such as thrombin, factor VIIa, factor Xa, TF/FVIIa, and trypsin. These compounds could be useful to treat and/or prevent clotting disorders, and as anticoagulating agents.

Abstract: The invention relates to methods for preparing substituted cyclopentene compounds, their intermediates and use as neuraminidase inhibitors.

Abstract: Compounds of formula (I) are useful as inhibitors of trypsin like serine protease enzymes such as thrombin, factor VIIa, factor Xa, TF/FVIIa, and trypsin. These compounds could be useful to treat and/or prevent clotting disorders, and as anticoagulating agents.

Abstract: Compounds represented by the formula: 1

Abstract: T-cell inhibition proliferation in a mammalian host by administering effective amounts of 2′-deoxyguanosine and/or prodrugs thereof; and certain PNP inhibitors.

Abstract: Enhancement of T-cell proliferation in a host inhibition is provided by administering 2′-deoxyguanosine and/or prodrug thereof and a PNP inhibitor. The PNP inhibitor has a Ki value of 50 nanomoles or less.

Abstract: The present invention is concerned with new compounds, and particularly those having a fused bicyclic ring substituted with an amidine moiety. These compounds are each potent inhibitors of Factor D of the alternate pathway of complement, C1s of the classical pathway of complement, Factors Xa, XIIa, VIIa and thrombin of the coagulation pathway, plasmin in the fibrinolytic pathway, and kallikrein and high molecular weight kininogen in the inflammatory pathways. These proteases, which have serine in their active site, are called serine proteases and they are pivotal to most of the processes of inflammation and coagulation. In fact, these various systems are interactive with one another and it is difficult to activate one pathway without it influencing the others.

Abstract: The invention relates to a process for preparing substituted cyclopentane derivatives represented by the formula (I) wherein R1, R2, R3, R4, X and Y are as described in the specification, and pharmaceutically acceptable salts thereof. The invention further relates to a process for purifying the compound of formula (Ia) and novel crystalline forms of the compound of formula (Ia).

Abstract: Compounds I-III wherein U is CH, O, or S; Z is mono- or di-substituted carbon; R is (CH2)nCO2H, (CH2)nSO3H, (CH2)nPO3H2, (CH2)nNO2, CH(SCH3)3, esters; R1 is H, hydroxyalkyl, aminoalkyl, alkoxyalkyl; RR1 is O; n is 0-4; R2, R3 is H, hydroxyalkyl, aminoalkyl, alkoxyalkyl, haloalkyl; R4 is (CH2)nOH, (CH2)nNH2, substituted alkyl were prepd. as neuraminidase inhibitors. Thus, (1R,3R,4R,1′S)-(−)-(1′-acetylamino-2 ′-ethyl)butyl-4-(aminoimino)methylaminocyclopentan-1-carboxylic acid was prepd. and tested in vitro as neuraminidase inhibitor (IC50<1.mu.M).

Abstract: Certain substituted pyrrolidine compounds, pharmaceutically acceptable salts thereof, and their method of preparation are disclosed as well as use as influenza virus neuraminidase inhibitors.

Abstract: New cyclopentane and cyclopentene compounds are provided along with their use in method for detecting influenza virus.

Abstract: The invention relates to a process for preparing (−)-(1S,4R) N protected 4-amino-2-cylcopentene-1-carboxylate esters represented by the formula (I) wherein R1 and R2 are as described within the specification.

Abstract: 1-C-(9-deazaaden-9-yl)-1,4-imino-D-5′-deoxy-5′-methylthioribitol) and pharmaceutically acceptable salts thereof are useful for inhibiting MTAP and treating cancer. A method for preparing the compounds of the present invention is also provided.

Abstract: Compounds represented by formula (I), and pharmaceutically acceptacle salts thereof; and their method of preparation are provided. Compounds of the above formula are influenza virus neuraminidase inhibitors and can be used in treating patients infected with influenza virus.

Abstract: Compounds represented by the formula: 1