in not given reaction at 100°C;;

in not given reaction for 26 h at 100°C;;

in not given

C6H5NCO in not given byproducts: NH(C6H5)CHO;

formic acid in not given byproducts: CO2, H2O; 100°C, stirring (4 h), then 200°C (200 Torr, 4 h), addn. of further formic acid, then 100°C (30 min); further product: Bu3SnOCHO; cooling to room temp., addn. of MeOH, decantation, addn. of petroleum ether, filtration, evapn., distn.; mixt. of products detd. by (119)Sn-NMRspectroscopy and liquid chromy.;

in not given

in neat (no solvent) byproducts: H2; (N2), Schlenk techniques; heating Sn compd. (200°C) for 6 h; NMR;