Triarylsilanols have been reported as the first silicon-centered molecular catalysts for direct amidation of carboxylic acids with amines as identified after a screen of silanols, silanediols, disiloxanediols, and incompletely condensed silsesquioxanes as potential homogeneous catalysts. Subsequent synthesis and testing of various electronically differentiated triarylsilanols have identified tris(p-haloaryl)silanols
据报道,三芳基
硅烷醇是第一种用于
羧酸与胺直接酰胺化的以
硅为中心的分子催化剂,经过对
硅烷醇、
硅烷二醇、二
硅氧烷二醇和不完全缩合倍半
硅氧烷作为潜在均相催化剂的筛选后确定。随后合成和测试各种电子分化的三芳基
硅烷醇已确定三(对卤代芳基)
硅烷醇比母体三芳基
硅烷醇更活跃,其中
溴化物同系物被发现是最活跃的。催化剂分解可以通过NMR方法观察到,但RPKA方法表明产物抑制是有效的,其中叔酰胺比仲酰胺更具抑制性。使用真实合成的三芳基甲
硅烷基酯作为催化系统中的推定中间体的研究使得能够提出由计算支持的合理机制。