lithium diethylamide in N,N,N',N',N'',N''-hexamethylphosphoric triamide; diethyl ether T=20°C; 3 h; Various reagents/solvents was used for the cyclisation (n-BuLi/TMEDA, K-t-butoxide/DMSO).; Product distribution;

lithium diethylamide in N,N,N',N',N'',N''-hexamethylphosphoric triamide; diethyl ether T=20°C; 3 h; Various reagents/solvents was used for the cyclisation (n-BuLi/TMEDA, K-t-butoxide/DMSO).; Product distribution;

lithium diethylamide in N,N,N',N',N'',N''-hexamethylphosphoric triamide; diethyl ether T=20°C; 3 h; Various reagents/solvents was used for the cyclisation (n-BuLi/TMEDA, K-t-butoxide/DMSO).; Product distribution;