An efficient chemoenzymatic approach to enantiomerically pure 4-[2-(difluoromethoxy)phenyl] substituted 1,4-dihydropyridine-3,5-dicarboxylates
作者:Arkadij Sobolev、Maurice C.R. Franssen、Brigita Vigante、Brigita Cekavicus、Natalija Makarova、Gunars Duburs、Aede de Groot
DOI:10.1016/s0957-4166(02)00022-8
日期:2001.12
An efficient chemoenzymatic synthesis of (-)-3-methyl 5-(2-propoxyethyl) (4R)-4-[2-(difluoromethoxy)phenyl]-2,6-dimethyl-1,4-dihydro-3,5-pyridinedicarboxylate has been achieved. The key step is a highly stereoselective Candida rugosa lipase (CRL)-mediated asymmetrisation of the prochiral bis[(isobutyryloxy)methyl]-4-[2-(difluoromethoxy)phenyl]-1,4-dihydro-2,6-dimethyl-3,5-pyridinedicarboxylate. (C) 2002 Elsevier Science Ltd. All rights reserved.