A convenient transformation of N-substituted ureas into N-(t-butoxycarbonyl)amines using a copper(II) salt-lithium t-butoxide system
作者:Jun-ichi Yamaguchi、Yuji Shusa、Takayuki Suyama
DOI:10.1016/s0040-4039(99)01751-7
日期:1999.11
Treatment of N-substituted ureas with a copper(II) reagent prepared from lithium t-butoxide and copper(II) halide led to give the corresponding N-(t-butoxycarbonyl)amines under mild conditions. On the contrary, no reaction of N,N-disubstituted ureas proceeded. Under the conditions the generation of azodicarbonyldiamide derivatives is expected. Further treatment of azodicarbonyldiamide derivatives with
用由叔丁醇锂和卤化铜(II)制备的铜(II)试剂处理N-取代的脲导致在温和的条件下得到相应的N-(叔丁氧羰基)胺。相反,没有进行N,N-二取代的脲的反应。在这种条件下,预计会生成偶氮二羰基二酰胺衍生物。还进行了用铜(II)试剂对偶氮二羰基二酰胺衍生物的进一步处理,得到了相应的N-(叔丁氧基羰基)胺。