Diastereoselective Synthesis of ψ[(<i>E</i>)-CHCMe]- and ψ[(<i>Z</i>)-CHCMe]-Type Dipeptide Isosteres by Organocopper-Mediated <i>anti</i>-S<sub>N</sub>2‘ Reaction
作者:Shinya Oishi、Takae Kamano、Ayumu Niida、Yoshihiko Odagaki、Hirokazu Tamamura、Akira Otaka、Nobuyuki Hamanaka、Nobutaka Fujii
DOI:10.1021/ol016834j
日期:2002.4.1
[GRAPHICS]Acyclic Psi[(E)-CH=CMe]- and Psi[(2)-CH Me]-type dipeptide isosteres were efficiently synthesized. In a key reaction, alpha-alkylation of gamma-mesyloxy,beta-methyl-alpha,beta-unsaturated esters with organocyanocuprates in diethyl ether or tetrahydrofuran preferentially afforded the V[(E)-CH=CMe]- or Psi[(2)-CH=CMe]-isomer, respectively, via anti-S(N)2' mechanism.