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.
Enantioselective Carbon−Carbon Bond Formation via S<sub>N</sub>2‘ Displacements of Acyclic Allylic Mesylates<sup>1</sup>
作者:Joseph P. Marino、Alma Viso、Jae-Don Lee、Roberto Fernández de la Pradilla、Paloma Fernández、M. Belén Rubio
DOI:10.1021/jo961292i
日期:1997.2.1
S(N)2' displacement of enantiomerically pure allylic mesyloxy vinyl sulfoxides takes place with high yields and stereoselectivities. In these adducts, the newly created chiral center is adjacent to a vinyl sulfoxide functionality which should allow for subsequent chirality transfer operations. Alternatively, enantiopure alkenyl sulfones and alkenes bearing an allylic stereocenter are readily available
Asymmetric carbon-carbon bond formation via sulfoxide-directed SN2' displacements of acyclic allylic mesylates
作者:J. P. Marino、A. Viso、Roberto Fernandez de la Pradilla、P. Fernandez
DOI:10.1021/jo00004a002
日期:1991.2
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.