One-pot syntheses of sulfinates, sulfinamides, and thiosulfinates by O-, N-, and S-sulfinylations of alcohols, amines, and thiols with p-toluenesulfinic acid in the presence of various activating reagents, phenyl phosphorodichloridate (1), diphenyl phosphoro-chloridate (2), triphenylphosphine N-chlorosuccinimide (NCS) (3), and 3-(phthalimidoxy)-1, 2-benzoisothiazole 1, 1-dioxide (4), were investigated. All of these reagents were reasonably effective for O-and S-sulfinylation, but ineffective for N-sulfinylation. Among them, the reagents 1 and 2 were slightly more efficient than the others.
Alkyl arenesulfinates and S-thiosulfinates are readily accessible in good yields by the reaction of sulfinic acids and alcohols or thiols, respectively, in the presence of lanthanide(III) triflates as catalysts.
The first stereoselective synthesis of optically active thiosulfinates
作者:Józef Drabowicz、Marian Mikoł
DOI:10.1016/s0040-4039(01)80925-4
日期:1985.1
Treatment of opticallyactive -toluenesulfinamides (1) with thiols (2) in the presence of trifluoroacetic acid was found to give opticallyactive -toluenethio-sulfinates (3) with predominant inversion of configuration. Stereospecificity of this reaction varies from 30 to 80%. Some mechanistic aspects of the reaction are also discussed.