3-Hydroxypyridine is reduced with sodium borohydride in the presence of benzyl chloroformate to give 1-benzyloxycarbonyl-5-hydroxy-2-piperideine which is transformed into (+)-pseudoconhydrine and (+)-N-methyl-pseudoconhydrine in five steps involving a lipase-mediated kinetic resolution.
在
氯甲酸苄酯存在下,用
硼氢化钠还原 3-
羟基吡啶,得到 1-苄氧羰基-
5-羟基-2-哌啶,然后通过
脂肪酶介导的动力学分解,分五个步骤转化为(+)-假酸酐和(+)-N-甲基假酸酐。