methanol in methanol Irradiation (UV/VIS); solid carbene complex is added to an oven-dried Pyrex pressure tube, followed by dry methanol, contents are degassed, purged with Ar, warmed to room temp., purged with CO, pressurized with 50-90 psi CO, irradiated (450 W) for 6 d; monitored by TLC, mixt. is filtered (Celite), evapg. in vacuo yields pure product; NMR, IR, elem. anal.;

P=2585.7 - 4654.3 Torr; 144 h; Ambient temperatureIrradiation;

sodium carbonate in acetonitrile 4 h; Heating;

potassium carbonate in acetonitrile Heating;

1.1: 68 percent / CH2Cl2; toluene / 4 h / 0 - 20 °C 2.1: AIBN / benzene / Heating 2.2: 73 percent / (Me3Si)3SiH / benzene / 3 h / Heating View Scheme