A highly enantioselective thiolation of sulfonyl indoles to access 3-sec-sulfur-substituted indoles in water
作者:Ping Chen、Sheng-mei Lu、Wengang Guo、Yan Liu、Can Li
DOI:10.1039/c5cc07721d
日期:——
Highlyenantioselective organocatalytic Michaeladdition of thiol to vinylogousimineintermediatesgenerated in situfrom sulfonylindoles in aqueous medium is presented.
Malononitrile on rare form: HighlyenantioselectiveMichaeladdition of malononitrile to vinylogousimineintermediates 2, generated in situfromarylsulfonylindoles 1, is described (see scheme). This protocol provides easy and convenient access to valuable 3‐indolyl derivatives 3 in high yields and enantioselectivities. A possible catalytic mechanism is proposed.