sodium amalgam in tetrahydrofuran Rh complex treated with sodium amalgam in THF at room temp. for 3 h, excess of amalgam filtered, soln. added under CO atmosphere to soln. of org. compd. over 45 min, mixture stirred at room temp. for 2 d; filtration, concn., addn. of light petroleum, filtration, addn. of MeOH, washing (light petroleum), drying in vac.; elem. anal.;

T=240°C;

Irradiation (UV/VIS); soln. of Fe complex in excess of org. compd. sealed under vac. in a silica reaction tube, irradiated with UV lamp for 5 d; chromy. (Florisil, light petroleum), washing (Et2O), drying in air;

calcium carbonate; zinc 1.) 185-190 deg C, 2 h, 2.) diglyme, reflux, 30 min; Yield given. Multistep reaction;