The object Of this Study was the reductive carbonylation of 1,3-dinitrobenzene, 1,4-dinitrobenzene and 2,4-dinitrotoluene to respective dicarbamates in the presence of the PdCl2/Fe/I-2/Py catalytic system. By increasing the catalyst amount and extending the carbonylation reaction time a 100% conversion of dinitrobenzene to the col responding dicarbamates was achieved with a selectivity of 87, 68, and 55%, for 1,4-. 1,3-dinitrobenzene and 2,4-dinitrobenzene, respectively, (C) 2009 Elsevier B.V. All rights reserved.