A very high-yielding reaction of bis(o-nitrophenyl) carbonate with aliphatic amines under mild conditions has been developed. The resulting o-nitrophenyl carbamates were characterized by IR, H-1-NMR, C-13-NMR, and elemental analysis.
Synthesis of Bis-ureas from Bis(o-nitrophenyl) Carbonate
A general method for the preparation of bis-ureas from bis(o-nitrophenyl) carbonate has been developed. Directional urea synthesis is achieved by sequential amine addition to bis(o-nitrophenyl) carbonate in two steps: in the first step bis(o-nitrophenyl) carbonate is reacted with benzylamine to form benzyl-o-nitrophenyl carbamate; in the second step the carbamate is reacted with a variety of diamines