摘要 一系列光学活性杂化化合物,4-芳基-3-(乙氧羰基)-2-甲基-4,11-二氢-1 H-苯并[ b ]吡啶基[2,3- e ] [1,4]二氮杂-通过富含对映体的6-氯-5-甲酰基-1,4-二氢吡啶衍生物与苯之间的偶联反应已有效地合成了含有1 H -1,5-苯并二氮杂卓和1,4-二氢吡啶单元的6-盐-1,2-二胺 三氟乙酸的使用允许以非常高的产率获得相应的杂种。在该过程中未发生消旋。 一系列光学活性杂化化合物,4-芳基-3-(乙氧羰基)-2-甲基-4,11-二氢-1 H-苯并[ b ]吡啶基[2,3- e ] [1,4]二氮杂-通过富含对映体的6-氯-5-甲酰基-1,4-二氢吡啶衍生物与苯之间的偶联反应已有效地合成了含有1 H -1,5-苯并二氮杂卓和1,4-二氢吡啶单元的6-盐-1,2-二胺 三氟乙酸的使用允许以非常高的产率获得相应的杂种。在该过程中未发生消旋。
Chemoenzymatic approach to optically active 1,4-dihydropyridine derivatives
摘要:
A series of racemic (2-methyl)propanoyloxymethyl 4-ary1-6-chloro-5-methanoy1-2-methy1-1,4-dihydropyridine-3-carboxylates [(+/-)-5a-h] have been prepared by a four step sequence including a multicomponent Hantzsch process and a Vilsmeier-Haack reaction. The subsequent resolution of (+/-)-5a-h was carried out by means of lipase-catalyzed hydrolysis, the most adequate enzymes being lipases from Candida rugosa (CRL) and Candida antarctica (CAL-B). The moderate to high enantioselectivities values (E up to >200) obtained in most cases allowed us to obtain the corresponding optically active 1,4-dihydropyridine derivatives with high enantiomeric excesses (ee >= 94%) and yields. (C) 2015 Elsevier Ltd. All rights reserved.