manganese(IV) oxide; 2-(2-(4,5-dihydrooxazol-2-yl)propan-2-yl)-4,5-dihydrooxazole; copper(II) bis(trifluoromethanesulfonate) in toluene T=120°C; 24 h; Inert atmosphereMolecular sieve;

1: 95 percent / K2CO3 / acetonitrile / 12 h / 20 °C 2: 93 percent / (1,3-dimesitylimidazolidin-2-ylidene)RuCl2(PCy3)(=CHPh) / CH2Cl2 / 1 h / Heating View Scheme