Addition of a carboxylic acid to an isocyanate initially yields the mixed acid anhydride, decarboxylation of which leads to the N-substituted amide. The conversion of acid into amide was shown to proceed similarly for both aliphatic and aromatic carboxylic acids with a range of substituted isocyanates.
首先将
羧酸加到
异氰酸酯中产生混合酸酐,其脱羧产生N-取代的酰胺。对于具有一定范围的取代
异氰酸酯的脂族和芳族
羧酸而言,显示出酸向酰胺的转化类似地进行。