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
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
Oxidation of N-alkyl-N'-tosylhydrazines with bromine
作者:Gianni Palmieri
DOI:10.1016/s0040-4020(01)88628-2
日期:1983.1
Oxidation of N-alkyl-N'-tosylhy”razines with bromine yield alkylbromides, vicinal alkyl dibromides and traces of alcohols. The main products of primary hydrazines are monobromides whereas secondary hydrazines preferably produce dibromides. The reaction proceeds with evolution of nitrogen and hydrobromic acid and by the formation of intermediate sulfinic ester which may be isolated. Various substrates