H. Ebiike et al., LIPASE-CATALYZED ENANTIOSELECTIVE HYDROLYSIS OF BIS(ACYLOXYMETHYL) 1,4-DIHYDRO-3,5-PYRIDINEDICARBOXYLATES LEADING TO OPTICALLY-ACTIVE MEDICINES, Chemical and Pharmaceutical Bulletin, 45(5), 1997, pp. 863-868
Chiral ,4-dihydro-2,6-dimethyl-3,5-pyridinedicarboxylates and 1,4-dihy
dro-2, 1,6-trimethyl-3,5-pyridinedicarboxylate have been obtained in 8
0-99%ee by lipase-catalyzed hydrolysis of bis(acyloxymethyl) dihydro-3
,5-pyridinedicarboxylate in an H2O/organic solvent system. These chira
l dihydropyridines were readily converted into chiral drugs, such as n
icardipine, felodipine and PCA 4248.