Copper-Catalyzed Alkylation of Sulfonamides with Alcohols
作者:Feng Shi、Man Kin Tse、Xinjiang Cui、Dirk Gördes、Dirk Michalik、Kerstin Thurow、Youquan Deng、Matthias Beller
DOI:10.1002/anie.200901510
日期:2009.7.27
Water is the only by‐product in an efficient and atom‐economical Cu(OAc)2‐catalyzed coupling of alcohols with sulfonamides (see proposed mechanism; Ts= p‐toluenesulfonyl). It was discovered that bissulfonylated amidines formed as intermediates when the transhydrogenative CN bond‐forming reaction is carried out in air act as novelligands to stabilize the catalyst.