MOA; urea in nitrobenzene heating of the metal acetate with 4-nitrophthalic anhydride in nitrobenzene in the presence of urea and ammonium molybdate to 180 to 190°C for 4 h; filtn., washing with hot ethanol and water, pptn. from concd. H2SO4, elem. anal.;

urea T=180 - 200°C; 1 h;

in not given W. Chen, S. Chen, S. Lu, Y. Yao, M. Xu, Sci. China Ser. B.: Chem. 50 (2007) 379-384.;

1: sulfuric acid; nitric acid 2: urea / 1 h / 180 - 200 °C View Scheme

1: urea / |Heating 2: sulfuric acid; nitric acid 3: urea / 1 h / 180 - 200 °C View Scheme

in N,N-dimethyl-formamide heating tetra-4-nitrophthalocyanine with the metal salt in DMF;