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.
Silver-Catalyzed Rearrangement of Propargylic Sulfinates to Allenic Sulfones
作者:Michael Harmata、Chaofeng Huang
DOI:10.1002/adsc.200700447
日期:2008.5.5
Treatment of propargylicsulfinate esters with 2 mol % of silver hexafluoroantimonate results in the rapid formation of allenicsulfones in essentially quantitative yield.
A Mitsunobu approach for the synthesis of sulfinate esters by direct nucleophilic substitution of alcohols is described. The salient features of this strategy include neutral and metal‐free conditions for the rapid synthesis of sulfinates in high yields. The present protocol using p‐toluenesulfonylmethyl isocyanide (TosMIC) and the triphenylphosphine (TPP)/diisopropyl azodicarboxylate (DIAD) reagent
Synthesis of thiophenes from allenyl sulfones involving α,β-unsaturated sulfines as intermediates
作者:Johannes B. van der Linden、Peter F. T. M. van Asten、Samuel Braverman、Binne Zwanenburg
DOI:10.1002/recl.19951140203
日期:——
The synthesis of thiophenes starting fromallenylsulfones, via intermediate formation of α,β-unsaturatedsulfines, is described. The allenylsulfones were synthesized by a [2,3]-sigmatropic rearrangement of appropriately substituted prop-2-ynyl sulfinates. Treatment of the allenylsulfones with n-butyllithium and chlorotrimethylsilane gave α-silylated allenylsulfones in almost quantitative yield
Substrate- and temperature-controlled divergence in reactions of alcohols with TosMIC catalyzed by BF<sub>3</sub> · Et<sub>2</sub>O: Facile access to sulfinates and sulfones
ABSTRACT An efficient BF3 · Et2O-catalyzed divergent synthesis of sulfinate esters and sulfones through C–O and C–S bond formation has been achieved from alcohols and p-toluenesulfonylmethyl isocyanide (TosMIC). Various alcohols reacted smoothly with TosMIC under the present conditions at room temperature providing sulfinate esters exclusively. By tuning the reaction temperature, the alcohols that