New general asymmetric synthesis of versatile .gamma.-alkylated butenolides and its application to expeditious synthesis of the chiral Geissman-Waiss lactones useful for (+)-retronecine synthesis
作者:Yoshimitsu Nagao、Wei Min Dai、Masahito Ochiai、Motoo Shiro
DOI:10.1021/jo00283a009
日期:1989.10
NAGAO, YOSHIMITSU;DAI, WEI-MIN;OCHIAI, MASAHITO;SHIRO, MOTOO, J. ORG. CHEM., 54,(1989) N2, C. 5211-5217