in benzene T=300°C;

in benzene T=300°C;

N,N,N',N',N'',N''-hexamethylphosphoric triamide; Bu3SnI T=40°C; 1 h;

triphenylantimony di-iodide in benzene T=45°C; 2 h; other substituted oxiranes and ketenes; other catalists; various solvents and conditions of reaction; Product distribution;