A convenient transformation of N-substituted ureas into N-(t-butoxycarbonyl)amines using a copper(II) salt-lithium t-butoxide system

Article abstract of DOI:10.1016/S0040-4039(99)01751-7

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 proce