ecologically safer way to synthesize protected amines, the reactions of amines with benzyl halides under CO2 atmosphere were systematically examined. For primary amines, the CO2-inserted products were obtained in higher yields in the presence of DBU as a base, under a high pressure of CO2, and in a low-polarity solvent (toluene/hexane 1 : 1). Secondary amines gave only low yields of CO2-inserted products
为了找到一种有用、实用且生态更安全的合成受保护胺的方法,系统地研究了胺与卤代苄在 CO2 气氛下的反应。对于伯胺,在 DBU 作为碱的存在下,在 的高压下,在低极性溶剂(甲苯/己烷 1:1)中,以更高的产率获得了插入 的产物。仲胺仅产生低产率的 插入产物。
OHTA, AKIHIRO;INAGAWA, YUKIKO;MITSUGI, CHIE, J. HETEROCYCL. CHEM., 1985, 22, N 6, 1643-1646