lithium diethylamide in N,N,N',N',N'',N''-hexamethylphosphoric triamide; diethyl ether T=0°C; 4 h;

lithium diethylamide in N,N,N',N',N'',N''-hexamethylphosphoric triamide; diethyl ether T=19°C; 20 h; Yield given. Yields of byproduct given. Title compound not separated from byproducts;

1: NaIO4 / 1) acetone, water. 0 deg C, 3 h, 2) r.t., 12 h 2: nBuLi, TMEDA / hexane / 24 h / 19 °C / further reagents, solvents, and temperatures; The factors governing the competitions between 1,2- and 1,3-eliminations was studied. View Scheme

lithium diethylamide in N,N,N',N',N'',N''-hexamethylphosphoric triamide; diethyl ether T=19°C; 20 h; Yield given. Yields of byproduct given. Title compound not separated from byproducts;

1: NaIO4 / 1) acetone, water. 0 deg C, 3 h, 2) r.t., 12 h 2: nBuLi, TMEDA / hexane / 24 h / 19 °C / further reagents, solvents, and temperatures; The factors governing the competitions between 1,2- and 1,3-eliminations was studied. View Scheme