An efficient method has been developed for the preparation of yet unknown acyclic mixed anhydrides of carboxylic and sulfinic acids. Sterically hindered 2-methylbut-3-ene-2-sulfinyl carboxylates add primary and secondary amines preferentially onto the carbonyl moieties realizing a new method for the one-pot preparation of carboxamides. It uses 1:1 mixtures of carboxylic acids and amines without a base
已经开发了一种有效的方法来制备未知的
羧酸和亚
磺酸的无环混合酸酐。受位阻的2-甲基丁-3-烯-2-亚磺酰基
羧酸酯优先将
伯胺和仲胺添加到羰基部分上,实现了一种一锅法制备羧酰胺的新方法。它使用不带碱的1:1
羧酸和胺混合物,不需要过量的试剂,仅释放挥发性副产物。通过应用该方法,可以在溶液中制备受保护的二肽和三肽,而没有差向异构化。