phenoxy-2-propanol) were synthesized. Key step is the lipase-catalyzed kinetic resolution of rac-3-hydroxy esters either by O-acylation using vinyl acetate or by hydrolysis of the ester group. Both approaches were highly enantioselective (> 95 %ee) with E-values > 150 using lipase from Pseudomonas cepacia. The formal synthesis of (−)-(S)-propranolol was developed in subsequent steps.
合成了对映体纯的β-阻滞剂(
普萘洛尔,
阿普洛尔和1-(异丙
氨基)-3-对甲氧基-苯氧基-2-
丙醇)。关键步骤是使用
乙酸乙烯酯的O-酰化作用或酯基的
水解,可实现rac -3-羟基酯的
脂肪酶催化动力学拆分。两种方法均使用洋葱假单胞菌的
脂肪酶对映体选择性高(> 95%ee),E值> 150 。在随后的步骤中开发了(-)-(S)-
普萘洛尔的形式合成。