M. Anbazhagan et al., CONVERSION OF CARBONIMIDODITHIOATES INTO UNSYMMETRICAL DI-SUBSTITUTEDAND TRI-SUBSTITUTED UREAS INCLUDING UREA DIPEPTIDES, Tetrahedron letters, 39(21), 1998, pp. 3609-3612
Selective hydrolysis of carbonimidodithioates (3) leads to the thiocar
bamates (4), which can be easily transformed to the unsymmetrical urea
s (5) by treatment with the appropriate amines. This constitutes a syn
thesis of ureas without the use of phosgene or carbon monoxide. (C) 19
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