Asymmetric Michael addition of chiral imines to phenylvinylsulfone: Preparation of key chiral building blocks for the synthesis of Aspidosperma and Hunteria alkaloids.
摘要:
Addition of chiral imine 8 to phenylvinylsulfone 9 led, after hydrolytic work-up to adduct 11 (91 % stereoselectivity). This derivative has been converted into target cyclopentanones 14 and 16.