A wide range of epoxides were efficiently converted to protected aldols by hydroformylation-acetalization using Co2(CO)8 as a catalyst in trimethyl orthoformate. The formylation of terminal epoxides was regioselective for the terminal position, and (S)-1-benzyloxy-2,3-epoxypropane was transformed into (R)-1-benzyloxy-4,4-dimethoxybutan-2-ol with retention of the configuration.
一系列
环氧化物通过在三甲基正福尔马酸酯中使用Co2(CO)8作为催化剂的
水解成
甲缩醛反应有效转化为保护醇。端基
环氧化物的甲酰化对端位具有选择性,(S)-1-苄氧基-2,3-环氧
丙烷被转化为(R)-1-苄氧基-4,4-二甲氧基丁-2-醇,配置保持不变。