NMR Studies and electrophilic properties of triphenylphosphine–trifluoromethanesulfonic anhydride; a remarkable dehydrating reagent system for the conversion of aldoximes into nitriles
作者:Ziad Moussa、Saleh A. Ahmed、Ahmad S. ElDouhaibi、Shaya Y. Al-Raqa
DOI:10.1016/j.tetlet.2010.01.119
日期:2010.4
NMR Studies on the reaction of triphenylphosphine with various amounts of triflic anhydride at 0 °C is described. The reagent structure resulting from mixing 1.3 equiv of Ph3P with Tf2O (1.0 mmol) has been established as an equilibrium mixture consisting mainly of triphenyl(trifluoromethylsulfonyloxy)phosphonium trifluoromethanesulfinate and the corresponding bis(triphenyl)oxodiphosphonium trifluoromethanesulfinate
NMR研究了三苯基膦与各种量的三氟甲磺酸酐在0°C下的反应。通过将1.3当量的Ph 3 P与Tf 2混合而形成的试剂结构已经建立了O(1.0mmol)作为平衡混合物,其主要由三氟甲烷亚磺酸三苯基(三氟甲基磺酰氧基)phosph和三氟甲烷亚磺酸盐相应的双(三苯基)氧二phosph二聚体组成。该系统的亲电特性已被用于开发将醛肟转化为腈的温和方法中。脱水是在0°C的非常温和的条件下进行的,首先激活肟氧,然后用碱处理,然后消除三苯膦氧化物。探索了该有用方法的底物范围和官能团耐受性。