in toluene under N2; addn. of α-imino ketone to stirred suspn. of Fe2(CO)9 in toluene, stirring for 14 h at room temp.; bubbling air through soln. for 5 min, evapn., column chromy. (SiO2, pentane for Fe3(CO)12, 7:1 pentane/Et2O for Fe2(CO)6 complex), crystn. frompentane at -60°C (Fe2(CO)6 complex);

sodium 1) ether, reflux, 4 h; 2) ether.; Yield given. Multistep reaction;

in benzene Heating;

hydrogen; palladium on activated charcoal in ethyl acetate 1 h; Ambient temperature;

in tetrahydrofuran T=60°C; 10 h;