Abstract
The reactivity of palladium complex supported by phenanthroline ligand has been studied in the reductive carbonylation of PhNO2 using different solvents. Nucleophiles like, 2,4,6- trimethyl phenol (TMP) and 2,2,2-trifluoro ethanol (TFE) were employed to obtain a carbamate that is more readily pyrolyzed, these nucleophiles were selected based on their larger size. TMP as the nucleophilic reagent and toluene as solvent resulted optimum conversion of nitrobenzene with excellent selectivity for carbamate. On the other hand, the use of p-toluene sulfonic acid was confirmed to be effective for the Pd/phenanthroline catalyzed nitrobenzene carbonylation reactions, even when co-solvents are present or other nucleophiles other than MeOH are employed, producing the corresponding carbamate in high selectivity.
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