A new protocol for the asymmetric synthesis of trans-2,6-disubstituted-4-piperidones has been developed using a catalytic enantioselective conjugate addition reaction in combination with a diastereoselective lithiation-substitution sequence; an efficient synthesis of (+)-myrtine has been achieved via this route.
利用催化对映选择性共轭加成反应和非对映选择性
锂取代基序列,开发了一种新的不对称合成反式2,6-二取代-
4-哌啶酮的方法。通过该途径,已经实现了(+)-桃
金娘碱的有效合成。