Abstract: The present invention provides processes for the production of chiral compounds in a stereoisomeric excess. The present processes involve reacting a hydrometallated alkene compound with a compound comprising a conjugated-bond system under conditions such that the compounds undergo an asymmetric 1,4- or 1,6-conjugate addition reaction, generating a chiral compound in a stereoisomeric excess. The reaction is performed in the presence of a metal catalyst, which catalyst preferably comprises a non-racemic chiral ligand.

Abstract: The present disclosure describes processes for the epimerization of a cyclohexene comprising the steps of providing to a reactor a first isomer of a 1-(2-alkyl-3-cyclohexen-1-yl)-alkanone compound according to Formula I wherein R1 ad R2 are each independently C1-C4 alkyl, and R3, R4, R5, R6, R7, and R8 are each independently selected from the group consisting of H and C1-C4 alkyl; and epimerizing the first isomer of the 1-(2-alkyl-3-cyclohexen-1-yl)-alkanone with a metal alkoxide base to form a second isomer of the 1-(2-alkyl-3-cyclohexen-1-yl)-alkanone.

Abstract: The present disclosure describes processes for producing cyclohexenes using Lewis acidic ionic liquids comprising the steps of providing to a reactor an ?,?-unsaturated carbonyl dienophile, providing to the reactor a 1,3-diene, providing a Lewis acidic ionic liquid to the reactor; and reacting the ?,?-unsaturated carbonyl dienophile with 1,3-diene to form a substituted cyclohexene product. The ?,?-unsaturated carbonyl dienophile can be mesityl oxide, the 1,3-diene can be piperylene; and the Lewis acidic ionic liquid can be AlCl3:[C2mim]Cl; AlCl3:[C8mim]Cl; or mixtures thereof.

Abstract: The present disclosure describes processes for producing cyclohexenes using Lewis acidic ionic liquids comprising the steps of providing to a reactor an ?,?-unsaturated carbonyl dienophile, providing to the reactor a 1,3-diene, providing a Lewis acidic ionic liquid to the reactor; and reacting the ?,?-unsaturated carbonyl dienophile with 1,3-diene to form a substituted cyclohexene product. The ?,?-unsaturated carbonyl dienophile can be mesityl oxide, the 1,3-diene can be piperylene; and the Lewis acidic ionic liquid can be AlCl3:[C2mim]Cl; AlCl3:[C8mim]Cl; or mixtures thereof.

Abstract: Compounds that are useful in compositions for flat panel displays, for example, are provided. The compounds provided are polar, and are useful in low threshold voltage mixtures. The compounds provided have the general structure: CpCOCH2[A]nZ1[B]mZ2PhX1X2Y, where CpCOCH2 is the structure: A and B are independently in each instance selected from the group consisting of 1,4-cyclohexane, 1,4-phenyl, 1,3-dioxan-5,2-diyl; pyridine-5,2-diyl; and pyrimidin-5,2-diyl; n and m are independently in each instance 0, 1 or 2; Z1 and Z2 are independently a single bond, —(CH2)2—, CF2O, OCF2, CH2O, OCH2, —C?C—, COO, OOC; and Y is selected from the group consisting of: F, Cl, CN, OCH2F, CHF2, OCF3, and CF3.

Abstract: Compounds containing a substituted or unsubstituted allyl group directly bound to a chiral carbon atom are prepared enantioselectively. Starting reactants are either chiral or achiral, and may or may not contain an attached allyloxycarbonyl group as a substituent. Chiral ligands are employed, along with transition metal catalysts. The methods of the invention are effective in providing enantioconvergent allylation of chiral molecules.

Abstract: A process for preparing vinyl substituted beta-diketones includes reacting a halogen-containing beta-diketone with an olefin in a reaction zone under Heck coupling reaction conditions in the presence of a catalyst, a base, and an organic phosphine to provide a vinyl substituted beta-diketone product.

Abstract: A series of aryl piperazine compounds are effective pharmaceuticals for the treatment of conditions related to or affected by the serotonin 1A receptor; the compounds are particularly effective antagonists at that receptor, and are particularly useful for alleviating the symptoms of nicotine and tobacco withdrawal.

Abstract: The invention relates to the use of an immobilized transition metal carbonyl complex as a catalyst in the Pauson-Khand reaction and to processes using such as catalyst.

Abstract: There are disclosed are a method for producing at least one compound selected from a carbonyl compound and a hydroxy adduct compound by an oxidative cleavage or addition reaction of an olefinic double bond of an olefin compound, which contains reacting an olefin compound with hydrogen peroxide, utilizing as a catalyst, at least one member selected from (a) tungsten, (b) molybdenum, or (c) a tungsten or molybdenum metal compound containing (ia) tungsten or (ib) molybdenum and (ii) an element of Group IIIb, IVb, Vb or VIb excluding oxygen, and a catalyst composition.

Abstract: Allyl alcohols are converted into corresponding aldehydes or ketones in a high yield under a mild condition by using an inexpensive aluminum alkoxide as an Oppenauer oxidation catalyst and a hydride acceptor. Thus, there is provided an industrially useful method for converting allyl alcohols to corresponding aldehydes or ketones.

Abstract: A method for preparing ketones has advantages of improving yields and reducing the time of the reactions due to high efficiency of catalysts. Ketones are prepared by reacting an aliphatic or an aromatic aldehyde with a vinyl olefin having an aliphatic or aromatic alkyl moiety in the presence of a transition metal catalyst, 2-aminopyridine catalyst, a primary amine and an acid, as catalysts and additives.

Abstract: Process for the continuous preparation of &agr;- and/or &bgr;-ionone or homologous compounds using concentrated sulfuric acid at temperatures from 20 to 90° C.

Abstract: A method for preparation of a new ketone from a preexisting ketone is very advantageous in terms of production cost and yield. A reactant mixture consisting of a ketone containing &bgr;-hydrogen relative to the aldehyde group and a vinyl olefin or internal olefin having an aliphatic or aromatic alkyl moiety is allowed to react at approximately 100-180° C. for at least 6 hours in the presence of a rhodium or iridium transition metal catalyst and a 2-aminopyridine derivative.

Abstract: &Dgr;5-7-oxo-steroids are efficiently prepared from &Dgr;5-steroids using t-BuOOH in the presence of a copper catalyst, such as cuprous and cupric salts and copper metal.

Abstract: The invention relates to a novel process for the preparation of hydroxyalkyl- and acyloxyalkyl-substituted cycloketones by free-radical addition of hydroxyalkenes and acyloxyalkenes respectively to cyclic ketones.

Abstract: Process for the continuous preparation of .alpha.- and/or .beta.-ionone or homologous compounds using concentrated sulfuric acid at temperatures from 20 to 90.degree. C.

Abstract: An improved process is described for preparing .gamma.,.delta.-unsaturated ke-tones, which are in demand as aroma substances and intermediates for vitamins and carotenoids, by reacting tertiary allyl alcohols and alkenyl alkyl ethers in the presence of acid catalysts at elevated temperature, which comprises carrying out the reaction in the presence of a phosphorus derivative of the formula IV ##STR1## where A and B are each a branched or unbranched alkyl or alkoxy having from 1 to 10 carbons, a substituted or unsubstituted aryl, cycloalkyl, aryloxy or cycloaryloxy;A can additionally be --H or --OH orA and B together are a substituted or unsubstituted tetramethylene or pentamethylene or substituted or unsubstituted phenyl-1,2-diol or 1,1'-binaphthyl-2,2'-diol.

Abstract: A process for preparing 2,5,6-trimethyl-2-cyclohexen-1-one by reacting diethyl ketone with crotonaldehyde or a compound which is converted under the chosen reaction conditions into crotonaldehyde, in the presence of basic agents at elevated temperature, which comprisesa) simultaneously pumping one mole of crotonaldehyde or one mole of a compound which is converted under the reaction conditions into crotonaldehyde, about 5 to 30 moles of diethyl ketone and the aqueous solution or suspension of a strong base, through separate lines or at least partly in the form of a suitable mixture, continuously into a pressure vessel, which is heated where appropriate and which ensures vigorous mixing, in such a way thatb) the reaction temperature is between 150.degree. C. and 350.degree. C., and the average residence time in the pressure vessel is only about 0.1 second to 20 minutes.

Abstract: The invention concerns an improved process for the preparation of macrocyclic products with 12 or more ring atoms containing one or more polar functional groups on the ring and/or one or more heteroatoms within the ring by ring closing metathesis (RCM) of suitably substituted diene precursors even if the substrates are devoid of any kind of conformational preorganization. Metal carbene complexes of Ru, Mo, W, Re, Os, which are tolerant towards the respective functional group and can either be isolated or prepared in situ are used as catalysts or catalyst precursors. Preferred catalysts or catalyst precursors are ruthenium complexes of the general type XX.sub.1 LL.sub.1 Ru.dbd.CRR.sub.1, wherein X, X.sub.1 =halogen, L, L.sub.1 =trialkylphosphine, R, R1=H, Ph, CH.dbd.CPh.sub.2 denote the most preferred embodiment. The process can be applied to the synthesis of olfactory compounds, perfumary ingredients, pheromones, crown ethers, antibiotics and pharmaceuticals for human and veterinary medicine.

Abstract: The present invention provides a novel optically active bidentate phosphine ligand palladium complex of formula (I) or (II) which can be used for the preparation of optically active .beta.-hydroxyketones: ##STR1## ?wherein Y.sup.- represents an anion pair which may form salt; X represents ##STR2## {wherein R.sup.1 represents hydrogen atom, C.sub.1-6 alkyl group, C.sub.1-6 alkoxyl group, cyano group, nitro group, halogen atom or phenyl group, etc.; m represents 1 or 2; when m is 2, two R.sup.1 s may be same or different}; andA and B each independently represents phenyl group or cyclohexyl group {said phenyl group and cyclohexyl group each is unsubstituted or substituted by R.sup.2 (R.sup.2 has the same meaning as defined in R.sup.1)}).

Abstract: A method for preparing nootkatone, nootkatol or mixtures thereof by oxidizing valencene, wherein the valencene is exposed to an oxygenated atmosphere in a suitable reaction medium and in the presence of an unsaturated fatty acid hydroperoxide, and the nootkatone and/or nootkatol is (are) optionally separated from the reaction medium. The method enables nootkatone yields of around 60 g per kg of reaction medium to be achieved.

Abstract: Acetylenic compounds of the general formula IR.sup.1 --C.tbd.C--CHR.sup.2 --CH.sub.2 --X Iwhere the substituents have the following meanings:R.sup.1 hydrogen, unsubstituted or substituted alkyl or aryl;R.sup.2 hydrogen or C.sub.1 -C.sub.4 -alkyl;X CN; COOR.sup.3 where R.sup.3 is C.sub.1 -C.sub.6 -alkyl or benzyl; C(O)R.sup.4 where R.sup.4 is hydrogen or C.sub.1 -C.sub.4 -alkyl,are prepared by reacting an alkyne of the formula IIR.sup.1 --C.tbd.C--H IIwith an .alpha.,.beta.-unsaturated compound of the formula IIIR.sup.2 HC.dbd.CH--X IIIin the presence of a homogeneous rhodium-phosphine catalyst, in a process wherein a catalyst with a bidentate or tridentate phosphine compound is used.

Abstract: Catalysts based on rhodium and water-soluble phosphine obtained by using rhodium perchlorate as the precursor rhodim salt. Also, processes for the preparation of these catalysts and to their use are provided.

Abstract: Described are cyclopentenyl-oxabicyclooctanes, cyclopentenyl-formylcyclohexenes and cyclopentylhydroxymethyl cyclohexenes having the generic structures: ##STR1## wherein R.sub.1, R.sub.2, R.sub.3 ', and R.sub.3 " each represents hydrogen or methyl with the provisos:(i) one or two or R.sub.1, R.sub.2, R.sub.3 ' and R.sub.3 " represents methyl;(ii) R.sub.1 and/or R.sub.2 are methyl;(iii) at least one of R.sub.3 ' and R.sub.3 " is hydrogen; and(iv) when R.sub.1 and R.sub.2 is methyl then each of R.sub.3 ' and R.sub.3 " is hydrogenwherein R.sub.4 ' is hydrogen or C.sub.1 -C.sub.5 alkyl, processes for preparing same and uses thereof in augmenting or enhancing the aroma of perfume compositions, colognes and perfumed articles, e.g., solid or liquid, anionic, cationic, nonionic or zwitterionic detergents, cosmetic preparations, fabric softener compositions, fabric softener articles, hair preparations and perfumed polymers.

Abstract: Compounds of the general formula ##STR1## wherein A is the ##STR2## group and in which R.sup.1 stands for hydrogen, methyl, ethyl, n-propyl, isopropyl, methoxy, ethoxy, n-propoxy and isopropoxy and R.sup.2 and R.sup.3 are hydrogen, methyl and ethyl. The compounds are used as perfume substances.

Abstract: Bicyclic carbinol of formula ##STR1## or 1,2,3,4,4a,5,8,8a-octahydro-2,2,6,8-tetramethyl-1-naphthalenol possesses useful odorous properties and it can be used advantageously as perfuming ingredient. A two-step process for its synthesis is disclosed starting from 2-methylpenta-1,3-diene and 6,6-dimethyl-cyclohex-2-en-1-one.

Abstract: Described are alkyl-substituted spirodecenone derivatives defined according to the structure: ##STR1## wherein one of R.sub.1 or R.sub.2 is hydrogen and the other of R.sub.1 or R.sub.2 is methyl; and wherein R.sub.3 represents C.sub.3 -C.sub.4 alkyl, and uses thereof in augmenting or enhancing the aroma of perfume compositions, colognes and perfumed articles including, but not limited to, solid or liquid anionic, cationic, nonionic or zwitterionic detergents, fabric softener compositions, fabric softener articles and hair preparations; as well as processes for preparing said alkyl-substituted spirodecenone derivatives.

Abstract: Ionones are prepared by cyclization of pseudoionone with concentrated sulfuric acid in the presence of an organic solvent or diluent, while cooling, and by dilution of the reaction mixture with water, by a continuous process in which the pseudoionone is combined with an aliphatic or cycloaliphatic hydrocarbon which boils at 25.degree.-65.degree. C. under the reaction conditions, or an aliphatic chlorohydrocarbon, and the sulfuric acid, with thorough mixing and evaporative cooling by partial or complete vaporization of the solvent present in the reaction mixture, combination being effected so that the temperature of the reaction mixture is from 25.degree. to 65.degree. C. and the residence time of this mixture before it is diluted with water is from 0.5 to 20, preferably from 0.1 to 5, seconds.The novel process can be used to prepare .alpha.- and .beta.-ionone in a technically simple and advantageous manner and in very good yields.

Abstract: Perfume compositions, perfumed materials and perfumed articles containing one or more isomers of substituted 1.4.4.8-tetramethyl-tricyclo[6.3.0.0.sup.2.5 ]-undecanes as perfume base.Use of one or more isomers of 9-alkanoyl-1.4.4.8-tetramethyl-tricyclo[6.3.0.0.sup.2.5 ]undecanes having formula ##STR1## wherein R is methyl, ethyl or n-propyl as a perfume component in perfume compositions and in imparting fragrance to materials and articles for example soaps, cleaning preparations and cosmetic preparations.

Abstract: Described are compounds having the generic structure: ##STR1## wherein the dashed line represents a carbon-carbon single bond or a carbon-carbon double bond; wherein X represents the moieties: ##STR2## wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.8 and R.sub.9 represent hydrogen or methyl with the proviso that (i) at least three of R.sub.1, R.sub.2, R.sub.3 and R.sub.4 represent hydrogen and (ii) when the dashed line is a carbon-carbon single bond and X is: ##STR3## then one of R.sub.1, R.sub.2, R.sub.3 or R.sub.4 is methyl and the other represents hydrogen; wherein R.sub.5 represents hydrogen, MgZ or Li; wherein Z represents chloro, bromo or iodo and wherein R.sub.

Abstract: Described are compounds having the generic structure: ##STR1## wherein the dashed line represents a carbon-carbon single bond or a carbon-carbon double bond; wherein X represents the moieties: ##STR2## wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.8 and R.sub.9 represent hydrogen or methyl with the proviso that (i) at least three of R.sub.1, R.sub.2, R.sub.3 and R.sub.4 represent hydrogen and (ii) when the dashed line is a carbon-carbon single bond and X is: ##STR3## then one of R.sub.1, R.sub.2, R.sub.3 or R.sub.4 is methyl and the other represents hydrogen; wherein R.sub.5 represents hydrogen, MgZ or Li; wherein Z represents chloro, bromo or iodo and wherein R.sub.

Abstract: Described is the compound trans, trans-.DELTA.-damascone and mixtures of trans, trans-.DELTA.-damascone and its isomer, cis, trans-.DELTA.-damascone is in a major proportion, a process for preparing same and processes for adding such trans, trans-.DELTA.-damascone or such mixtures containing high proportions of trans, trans-.DELTA.

Abstract: The present invention relates to substituted spirocyclic derivatives having the general formula: ##STR1## wherein the dotted line represents a carbon-carbon double bond or a carbon-carbon single bond, wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5, and R.sub.6 are each the same or different, hydrogen or lower alkyl, wherein Z is one of the following: ##STR2## wherein R.sub.7 is either hydrogen or lower alkyl, wherein R.sub.8 and R.sub.9 are each lower alkyl; their methods of preparation and their use as odor-modifying ingredients in perfumes and perfumed products, and as flavor-modifying ingredients in the flavoring of foodstuffs and tobacco products.

Abstract: New process for the preparation of muscone, a valuable macrocyclic musky perfume ingredient. The process makes use of an .alpha.,.omega.-dialdehyde as starting material.