Amide Formation in One Pot from Carboxylic Acids and Amines via Carboxyl and Sulfinyl Mixed Anhydrides
作者:Bartosz K. Zambroń、Srinivas R. Dubbaka、Dean Marković、Elena Moreno-Clavijo、Pierre Vogel
DOI:10.1021/ol401053y
日期:2013.5.17
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。