Abstract: The invention is directed a process of preparing a compound of formula (I), wherein R1, R2, R3 and z are as defined herein.

Abstract: The invention is directed a process of preparing a compound of formula (I), wherein R1, R2, R3 and z are as defined herein.

Abstract: The present invention is a process for the preparation of diphenylazetidinone derivatives of the formula (I) or forms thereof comprising the substituents X, R1 and/or R2 as defined herein. More specifically, the invention comprises methods for the preparation of these compounds by cyclization of certain ?-amino carboxamides or ?-amino carboxylic esters. These diphenylazetidinone compounds are useful in the treatment of high blood serum cholesterol levels and the maintenance of the reduced cholesterol levels achieved thereby.

Abstract: The present invention is directed to the preparation of novel compounds useful in the treatment of hyperlipidemia, arteriosclerosis, hypercholesterolemia, and other related metabolic disorders. More specifically, the present invention is a novel process for the preparation of 1,4-diphenylazetidinone derivatives from ?-substituted amino amides which are protected in the presence of silylating agents and at least one cyclization catalyst whose structural formula is represented by one of the general formula: wherein the various R-groups are defined herein.

Abstract: The invention is directed a process of preparing a compound of formula (I), wherein R1, R2, R3 and z are as defined herein.

Abstract: The present invention is directed to the preparation of novel compounds useful in the treatment of hyperlipidemia, arteriosclerosis, hypercholesterolemia, and other related metabolic disorders.

Abstract: The present invention is a process for the preparation of diphenylazetidinone derivatives of the formula (I) or forms thereof comprising the substituents X, R1 and/or R2 as defined herein. More specifically, the invention comprises methods for the preparation of these compounds by cyclization of certain ?-amino carboxamides or ?-amino carboxylic esters. These diphenylazetidinone compounds are useful in the treatment of high blood serum cholesterol levels and the maintenance of the reduced cholesterol levels achieved thereby.

Abstract: The invention relates to chiral Mannich bases of formula (I), chiral 1,3-amino alcohols of formula (II) derived therefrom, wherein R1, R2, R3, R4 and R5 are as defined herein, and to processes for preparing Mannich salts of formula (III) containing a chiral anion Y*? and compounds of formulae (I) and (II), wherein R1, R2, R3, R4, R5 and Y*? are as defined herein.

Abstract: 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.

Abstract: The present invention relates to a process for the preparation of acetyl-amidiniophenylalanyl-cyclohexylglycyl-pyridinioalaninamides of the formula I, 1

Abstract: The invention relates to chiral Mannich bases of formula (I), chiral 1,3-amino alcohols of formula (II) derived therefrom, wherein R1, R2, R3, R4 and R5 are as defined herein, and to processes for preparing Mannich salts of formula (III) containing a chiral anion Y*− and compounds of ormulae (I) and (II), wherein R1, R2, R3, R4, R5 and Y*− are as defined herein.

Abstract: The present invention relates to a process for the preparation of acetyl-amidiniophenylalanyl-cyclohexylglycyl-pyridinioalaninamides of the formula I, 1

Abstract: The present invention relates to optically active and racemic C.sub.2 -symmetric 2,2'-disubstituted 1,1'-diphosphino-ferrocenes of the formula Ia, to optically active and racemic asymmetric 1',2-disubstituted 1-phosphino-ferrocenes of the formula Ib and to achiral 2,2'-disubstituted 1,1'-diphosphino-ferrocenes of the formula II, to processes for preparing them, especially in accordance with the principle of asymmetric ortho-lithiation, to their use as ligands for transition metal complexes, to transition metal complexes comprising them, and to the use of the transition metal complexes as catalysts, especially in asymmetric syntheses.

Abstract: Compounds of the formula I ##STR1## can be prepared in a multi-day process starting from the compounds of the formulae II and IIIR.sup.1 --SH, II ##STR2## where the substituents R.sup.1, R.sup.2 and R.sup.3 have the meanings given.

Abstract: Compounds of the formula I ##STR1## in which the phenyl rings of the biphenyl molecule can be substituted with up to 8 fluorine and/or chlorine atoms are suitable as catalysts.

Abstract: Crystalline acid addition salts of diastereomerically pure 1-(2,2-dimethylpropionyloxy)ethyl 3-cephem-4-carboxylateThe invention relates to crystalline acid addition salt of the two diastereomers of the 1-(2,2-dimethylpropionyloxy)ethyl 3-cephem-4-carboxylate of the general formula II ##STR1## in which X is the anion of a physiologically acceptable, mono- or polybasic, inorganic or organic acid and the group =N--OH is in the syn-position, pharmaceutical formulations which are active against bacterial infections and contain such cephem derivatives, processes for the preparation of the cephem derivatives and the use of the cephem derivatives for combating bacterial infections.

Abstract: The invention relates to crystalline acid addition salt of the two diastereomers of the 1-(2,2-dimethylpropionyloxy)ethyl 3-cephem-4-carboxylate of the general formula II ##STR1## in which X is the anion of a physiologically acceptable, mono- or polybasic, inorganic or organic acid and the group .dbd.N--OH is in the syn-position, pharmaceutical formulations which are active against bacterial infections and contain such cephem derivatives, processes for the preparation of the cephem derivatives and the use of the cephem derivatives for combating bacterial infections.

Abstract: Process for the diastereoselective reductive pinacol coupling of homochiral .alpha.-aminoaldehydesA process for the preparation of optically pure symmetrical compounds of the formula I ##STR1## is described, in which R.sup.1, R.sup.2 and R.sup.3, are explained in the description, with simultaneous control of the four centers of chirality indicated by *.

Abstract: Process for the diastereoselective reductive pinacol coupling of homochiral .alpha.-aminoaldehydesA process for the preparation of optically pure symmetrical compounds of the formula I ##STR1## is described in which R.sup.1, R.sup.2 and R.sup.3 are explained in the description, with simultaneous control of the four centers of chirality marked by *.

Abstract: A novel process is described for preparing tert-butyl (3R, 5S ) 6-hydroxy-3,5-O-isopropylidene-3,5-dihydroxyhexanoate of the formula I ##STR1## which is a valuable structural element for preparing inhibitors of HMG-CoA reductase.