Asymmetric carbon-carbon bond formation via sulfoxide-directed SN2' displacements of acyclic allylic mesylates
摘要:
The addition of organocyanocuprates to acylic allylic mesylates bearing a chiral sulfoxide in the 2-position occurs with complete S(N)2' regioselectivity, high E/Z stereoselectivity (15:1) and high asymmetric induction to produce enantiometrically pure trisubstituted vinyl sulfoxides.
Evidence for “stable” organocopper intermediates in the reaction between Me2CuLi·LiI and allylic sulfinyl mesylates.
作者:Roberto Fernández de la Pradilla、M.Belén Rubio、Joseph P. Marino、Alma Viso
DOI:10.1016/s0040-4039(00)61252-2
日期:1992.8
The addition of Me2CuLi.LiI to acyclic allylic sulfinyl mesylates bearing a phenyl functionality in the molecule gives rise to chiral allenes 4 and 11 in variable yields and optical purities, presumably via an unusually stable sigma-copper(III) species.