摘要:
Process for the coupling of a) nucleophiles selected from the group alcohols, thioles, amines, metallised hydrocarbons, CH-acidic compounds and metal cyanides, or of b) carbon monoxide mixed with water, alcohols, ammonia, primary or secondary amines, to organic compounds selected from the group of leaving-group-containing aromatics, hetero-aromatics with a C-bonded leaving group, aromatic or hetero-aromatic methyl compounds with a leaving group bonded to the methyl group, ethylenically unsaturated organic compounds with a C-bonded leaving group, or organic allyl compounds with a leaving group in allyl position, or c) vinyl compounds with leaving-group-containing aromatics, whilst cleaving the leaving group in the presence of Pd complexes with monophospholine ligands as the catalyst, whereby variants b) and c) are carried out in the presence of an inorganic base or organic nitrogen base, the process being characterised in that the Pd complex contains secondary monophosphines with aliphatic, branched or cyclic substituents as ligands.
摘要:
One aspect of the present invention relates to methods for the transition-metal-catalyzed asymmetric 1,4-addition of a nucleophile, e.g., hydride, to cyclic and acyclic enoates and enones. In certain embodiments of the methods of the present invention, the transition metal catalyst consists essentially of copper and an asymmetric bidentate bisphosphine ligand.
摘要:
One aspect of the present invention relates to novel ligands for transition metals. A second aspect of the present invention relates to the use of catalysts comprising these ligands in transition metal-catalyzed carbon-heteroatom and carbon-carbon bond-forming reactions. The subject methods provide improvements in many features of the transition metal-catalyzed reactions, including the range of suitable substrates, reaction conditions, and efficiency.
摘要:
The present invention provides a class of chemical compounds useful as efficacious drugs in the treatment of sickle cell disease and diseases characterized by unwanted or abnormal cell proliferation, and in particular inflammatory diseases associated with unwanted cellular proliferation. The active compounds are substituted triaryl methane compounds or analogues thereof where one or more of the aryl groups is replaced with a heteroaryl, cycloalkyl or heterocycloalkyl group and/or the tertiary carbon atom is replaced with a different atom such as Si, Ge, N or P. the compounds inhibit mammalian cell proliferation, inhibit the Gardos channel of erythrocytes, reduce sickle erythrocyte dehydration and/or delay the occurrence of erythrocyte sickling or deformation.
摘要:
One aspect of the present invention relates to novel, electron-rich bidentate ligands for transition metals. A second aspect of the present invention relates to the use of catalysts comprising these ligands in transition metal-catalyzed carbon-heteroatom and carbon-carbon bond-forming reactions. The subject methods provide improvements in many features of the transition metal-catalyzed reactions, including the range of suitable substrates, reaction conditions, and efficiency.
摘要:
New compounds containing bicyclic fused rings, one of which being a phenyl moiety connected by an aliphatic chain to a cycloalkyl or aryl moiety, and pharmaceutically active salts thereof are useful as RAR selective retinoid agonists. Furthermore, such retinoic acid receptor agonists, particularly retinoic acid receptor null (RARnull) selective agonists, are useful for the treatment of emphysema and associated pulmonary diseases, as well as for the therapy and prophylaxis of dermatological disorders, for the therapy and prophylaxis of malignant and premalignant epithelial lesions, tumors and precancerous changes of the mucous membrane in the mouth, tongue, larynx, esophagus, bladder, cervix and colon.
摘要:
The use of substituted 5-phenylpentan-1-ols, 5-phenylpentanals, 5-phenylpentanitriles, 5-phenylpentanoic acid and lower alkyl esters thereof and 5-phenylpentanyl esters of C1-C6 aliphatic acids as fragrance materials is disclosed. The subject fragrance materials are, in large measure, novel compounds. The subject materials possess unique fragrance notes and are cost-effective materials.
摘要:
Description here is a novel process for preparing phenyl acetic acid derivatives of the formula (I) Ar--CH.sub.2 --R.sup.1 (I) in which Ar and R.sup.1 are as defined in the description by reaction of sulfonyloxy-activated hydroxyacetic acid derivatives of the formula (II) R.sup.3 --SO.sub.2 --O--CH.sub.r --R.sup.1 (II) in which R.sup.3 is as defined in the description. with aromatics of the formula (III) Ar--H (III) has been found. The intermediates of the formula (II), some of which are novel, are obtained from hydroxyacetic acid derivatives by reaction with sulfonyl halides or sulfonic anhydrides. The phenylacetic acid derivatives are important starting materials for preparing pesticides.
摘要:
The present invention provides compounds of the formula: ##STR1## and the pharmaceutically acceptable salts thereof, wherein: R.sup.1 and R.sup.2 are each alkyl;n is an integer of from 1 to 4;x is oxygen or --(CH.sub.2).sub.m --;m is an integer of from 1 to 3;y is oxygen or sulfur; andp is an integer of from 1 to 4.These compounds are inhibitors of COX-I and/or COX-II, and are useful for the treatment of inflammation-associated disorders.The present invention also provides pharmaceutical compositions comprising a therapeutically-effective amount of a compound of Formula I in combination with a pharmaceutically-acceptable carrier, and a method for treating inflammation-associated disorders in an animal comprising administering a therapeutically-effective amount of a compound of Formula I to the animal.
摘要:
Described are the 2,2-dimethyl-4(2' or 4'-pyridyl) butyronitriles defined according to the generic structure: ##STR1## wherein one of R.sub.1 ' or R.sub.2 ' is the moiety: ##STR2## and the other of R.sub.1 ' or R.sub.2 ' is hydrogen as well as perfumery uses thereof and processes for preparing same.