Briscoe et al., Journal of the Chemical Society, 1956, p. 1755,1762
作者:Briscoe et al.
DOI:——
日期:——
Catalytic Asymmetric Sulfimidation
作者:Hiroya Takada、Yoshiaki Nishibayashi、Kouichi Ohe、Sakae Uemura、Charlotte P. Baird、Tim J. Sparey、Paul C. Taylor
DOI:10.1021/jo970798d
日期:1997.9.1
A direct catalytic imidation of sulfides to sulfimides with [N-(p-tolylsulfonyl)imino]phenyliodinane (TsN=IPh) using a catalytic amount of copper triflate (CuOTf) has been developed. The reaction proceeds with a wide range of sulfides to give the corresponding sulfimides in 50-83% isolated yields. When the reaction is applied to allylic sulfides, the products are the corresponding sulfonamides produced via [2,3] sigmatropic rearrangement of the initially formed allylic sulfimides. In the presence of a chiral bis(oxazoline) as ligand, asymmetric induction occurs to afford the chiral sulfimides (up to 71% ee) and sulfonamides (up to 58% ee). Chloramine T (TsNClNa) can be used in place of TsN=IPh for asymmetric sulfimidation, but the ee's are much lower. Some mechanistic observations are described.