N,N,N',N',N'',N''-hexamethylphosphoric triamide; allylsamarium bromide in tetrahydrofuran T=20°C; 1 h; Inert atmosphere; SolventReagent/catalyst;

N,N,N',N',N'',N''-hexamethylphosphoric triamide; allylsamarium bromide in tetrahydrofuran T=20°C; 1 h; Inert atmosphere; SolventReagent/catalyst;

With  toluene-4-sulfonic acid in  toluene 7 h;  Heating;