On the cleavage of tertiary amines with ethyl chloroformate.
作者:TADASHI KOMETANI、SHUNSAKU SHIOTANI、KEMMOTSU MITSUHASHI
DOI:10.1248/cpb.24.342
日期:——
Forty-seven tert. amines were examined in order to observe the relative lability of the various N-substituents in respect to cleavage by ClCO2Et in refluxing benzene. The aromatic amines did not react with ClCO2Et, while aliphatic and alicyclic amines were cleaved to give carbamate (s) ; the tendency to cause R-N cleavage was : benzyl>allyl>methyl>ethyl>other alkyl groups. It was found that the reaction of a tert. amine with ClCO2Et is greatly influenced by the polarity of the solvent, reaction temperature and N-substituents.
在回流苯中,研究了47种叔胺与ClCO2Et的反应,以观察各种N-取代基相对于断裂的相对活泼性。芳香胺不与ClCO2Et反应,而脂肪和脂环胺断裂生成氨基甲酸酯(或多肽);导致R-N断裂的倾向为:苄基>烯丙基>甲基>乙基>其他烷基。研究发现,叔胺与ClCO2Et的反应受溶剂极性、反应温度和N-取代基的显著影响。