N-p-Toluenesulfinylimidazole: A New in situ Reagent for the Mild and Efficient Synthesis of p-Toluenesulfinate Alkyl Esters and Aryl Esters
作者:Shawn R. Hitchcock、Jessica L. Shaw、Brad J. Austermuehle、Jordan M. Witte、Timothy R. Dorsey、Christina Delach、Christopher G. Hamaker
DOI:10.1055/a-1472-7578
日期:2021.8
A new synthetic methodology has been developed for the synthesis of sulfinate alkyl and aryl esters. The methodology involves the combination of p-toluenesulfinic acid and 1,1′-carbonyldiimidazole (CDI) to create the putative reagent sulfinylimidazole. The process spontaneously releases carbon dioxide upon the addition of the CDI to the acid suggesting the rapid formation of the proposed reagent. Reaction
A convenient and efficient method for the synthesis of various structurally functionalized sulfinates shows good substrate generality of alcohols and sodium sulfinates.
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