NEW HIGHLY SELECTIVE PROCESS FOR THE PREPARATION OF ENANTIOMERICALLY PURE PHENYL-SUBSTITUTED 1, 4- DIHYDROPYRIDINE-3,5-DICARBOXYLIC ACID DERIVATIVES

摘要

THE PRESENT INVENTION RELATES TO A NEW HIGHLY SELECTIVE PRORESS FOR THE PREPARATION OF ENANTIOMERICALLY PURE HALOGENO-PHENYL-SUBSTITUTED I, 4 DIHYDROPYRIDINE- 3,5-DICARBOXYLIC ESTERS OF THE GENERAL FORMULA (I) IN WHICH R1 TO R3 HAVE THE MEANINGS GIVEN IN THE DESCRIPTION.