The enzymatic optical resolution of racemic N-benzyl-3-pyrrolidinol (2) was investigated. It was found that only (R)-2 was acetylated by the lipase Amano P in yields of 50% and 100%e.e. Remaining (S)-alcohol 2 could be chemically inverted to (R)-acetate 3. A continuous reaction in a column reactor could be also applied to this optical resolution. After concentrating the eluted solution, the residue was subjected to the inversion reaction to provide (R)-acetate 3 in an 83% yield and 91%e.e. from the racemate.
研究了外消旋
N-苄基-3-吡咯烷醇(2)的酶光学分解。研究发现,只有(R)-2 能被
脂肪酶 Amano P 乙酰化,乙酰化率分别为 50%和 100%,即剩余的(S)-醇 2 可以通过
化学反应转化为(R)-
乙酸酯 3。柱式反应器中的连续反应也可用于这种光学分解。浓缩洗脱溶液后,残留物进行反转反应,得到(R)-
乙酸酯 3,收率为 83%,外消旋体的反应效率为 91%e.e.。