摘要:
The present invention relates to a process for the preparation of chiral, nonracemic compounds of the formula I ##STR1## in which R.sup.1 and R.sup.2 have the meanings indicated in claim 1 and which are useful intermediates for the preparation of pharmaceutical active compounds in which, for resolution, a salt is formed from the racemic compound of the formula I and a chiral, nonracemic amino compound. It furthermore relates to compounds of the formula I and esters thereof.
摘要:
Process for the stereoselective synthesis of 3-substituted 2-thiomethylpropionic acidsCompounds of the formula I ##STR1## in which R.sup.1 and R.sup.2 are as defined can be prepared stereoselectively by reaction of acrylic acid or derivatives thereof or propionic acid or derivatives thereof with a chiral auxiliary, reaction with a mercaptan, stereoselective alkylation and subsequent hydrolysis and oxidation.
摘要:
The present invention relates to a process for the preparation of acetyl-amidiniophenylalanyl-cyclohexylglycyl-pyridinioalaninamides of the formula I, in which the anions X are physiologically acceptable anions, and their analogs, which are effective inhibitors of the blood coagulation factor Xa and which can be used, for example, for preventing thromboses. The process according to the invention comprises the coupling of 2-[2-acetylamino-3-(4-amidinophenyl)propionylamino]-2-cyclohexylacetic acid, which is obtained from 2-[2-acetylamino-3-(4-cyanophenyl)acryloylamino]-2-cyclohexylacetic acid by asymmetric hydrogenation and conversion of the cyano group into the amidine, or a salt thereof, with a 3-(2-amino-2-carbamoylethyl)-1-methylpyridinium salt or a salt thereof. The invention furthermore provides starting materials and intermediates for this process, processes for their preparation and acetyl-(S)-4-amidiniophenylalanyl-(S)-cyclohexylglycyl-(S)-(1-methyl-3-pyridinio)alaninamide as ditosylate salt.
摘要:
Process for the resolution of rac-2-oxotricyclo�2.2.1.0.sup.3,5 !heptane-7-carboxylic acid esters using lipase from candida.Compounds of the formula I ##STR1## in which R.sup.1 has the meanings mentioned, may be obtained in isomerically pure form from enantiomer mixtures or racemic mixtures by reacting the compound of the formula I in the presence of a lipase or esterase from porcine liver, porcine pancreas, bovine pancreas or from microorganisms such as Candida, Pseudomonas, Mucor, Rhizopus and Aspergillus, or proteases from Bacillus in the presence of water and, if desired, a cosolvent and separating from one another the esters and acids present in the solution obtained.
摘要:
The invention relates generally to a process for preparing diarylcycloalkyl derivatives of the formula (I). wherein the respective R-group substituents are defined herein. These compounds of formula (I) are activators for peroxisome proliferator-activated receptors (PPAR activators) which are useful in the therapeutic treatment of a number of diseases and disorders of the central nervous system such as multiple sclerosis, Parkinson's Disease, psychiatric disorders and the like. The present invention is a novel process for preparing PPAR activators of the formula (I) which do not have the disadvantages of the processes known in the prior art. In particular, a process is provided with which the PPAR activators of formula (I) can be prepared in a suitable enantiomeric excess, i.e. high enantioselectivity, without the need for subsequent chiral chromatography.
摘要:
It has been possible to show for a first time with the process according to the invention that the synthesis of glyco conjugates is possible by direct linkage of sugars with serine, serine derivatives and serine peptides with the aid of glucosidases.
摘要:
The present invention relates to a process for preparing chiral non-racemic cis-configured cyclohexanols or cyclohexanol derivatives of the formula (I) Cis-configured hydroxyl-cyclohexane carboxylic acid derivatives of formula (I) are central building blocks or immediate precursors for the medicinally active compounds which allow a therapeutic modulation of the lipid and/or carbohydrate metabolism and are thus suitable for preventing and/or treating type II diabetes, hyperglycemia and artherosclerosis. The cis-configured hydroxyl-cyclohexane carboxylic acid derivatives of formula (I) are central building blocks or immediate precursors for the medicinally active compounds described in the prior art.
摘要:
A process for highly regioselective esterification and ester cleavage on unsaturated sugar compounds with the aid of lipases and esterases, and products which can be prepared by this process.Highly regioselective esterifications and ester cleavages can be carried out on unsaturated sugar compounds with the aid of lipases and esterases. Lipases from microorganisms or from the pancreas and liver of animals are preferably used.
摘要:
Racemic alcohols can be resolved in good yield and with high enantiomeric purity in the presence of vinyl esters with the aid of lipases from pig pancreas, pig liver and microorganisms.
摘要:
The present invention relates to a process for deuteration of amines in the alpha and/or beta position of the N-atom by using a deuterium source and a Ruthenium(II) based catalyst.