in tetrahydrofuran T=-78 - 25°C; 2 h; Yields of byproduct given;

in tetrahydrofuran T=-78 - 25°C; 2 h; Yield given;

in dimethyl sulfoxide T=35°C; 1.3 h; Irradiationother solvent, time, temperature; Product distribution;

in dimethyl sulfoxide T=35°C; 1.3 h; Irradiationother solvent, time, temperature; Product distribution;

N,N,N',N',N'',N''-hexamethylphosphoric triamide; potassium tert-butylate; lithium diisopropyl amide 1.) THF, hexane, 5 h, r.t., 2.) THF, hexane, -78 deg C, 1 h, 3.) 15 min, -78 deg C -> r.t.; Yield given. Multistep reaction;

N,N,N',N',N'',N''-hexamethylphosphoric triamide; potassium tert-butylate; lithium diisopropyl amide Yield given. Multistep reaction;