A new copper-catalyzed oxysulfenylation reaction of enolates with sodium sulfinates has been disclosed. A series of sulfenylated heterocycles including four- and seven-membered cyclic ether were obtained in mild to good yields. This reaction is proposed to go through a radical process, and the sulfur radical (RS•) may be a reactive species.
An interesting rearrangement of unsaturated sulphonate and thiosulphonate esters
作者:Arménio C. Serra、Carlos M.M. da Silva Corrêa
DOI:10.1016/0040-4039(91)80246-3
日期:1991.11
Alkenyl tosylates and thiotosylates, in the presence of radical initiators, undergo radical rearrangements to the corresponding tetrahydrofuran and tetrahydrothiophen derivatives.
The cyclosulfonylation reaction: A comment on the radical reactions of 4-pentenyl tosylate
作者:Donald C Craig、Alexander Durie、Gavin L Edwards、David J Sinclair
DOI:10.1016/0040-4039(94)02446-i
日期:1995.2
Attempted free radical rearrangement of the para-toluenesulfonyl ester of 4-penten-1-ol in carbon tetrachloride gives only the simple Kharasch 1,2-adduct, instead of the 2-substituted tetrahydrofuran as claimed by Serra and da Silva Correa.