investigated. Aniline was reacted with titanium n‐butoxide (1) in the presence of carbon dioxide (5 MPa) to give the corresponding n‐butyl N‐phenylcarbamate (BPC) in nearly quantitative yield (99 %) within 20 min. Furthermore, 1 could be regenerated upon reaction with n‐butanol during water removal. The recovered 1 could then be reused in a subsequent reaction.
研究了在Ti(OR)4(R = n Bu(1),Me(2),Et(3),n Pr(4))存在下从胺和
二氧化碳直接合成
氨基甲酸酯的方法。在
二氧化碳(5 MPa)存在下,
苯胺与
正丁醇钛(1)反应,在20分钟内以几乎定量的产率(99%)得到相应的正丁基N-
苯基氨基甲酸酯(BPC)。此外,在脱
水过程中与
正丁醇反应后可再生1。恢复的1 然后可以在后续反应中重复使用。