N,N,N',N',N'',N''-hexamethylphosphoric triamide; n-butyllithium in tetrahydrofuran; hexane 1.) -78 deg C, 30 min, 2.) room temp, 20 h; Title compound not separated from byproducts;

N,N,N',N',N'',N''-hexamethylphosphoric triamide; prenyl bromide in tetrahydrofuran; hexane 1.) THF/hexane, -78 deg C, 30 min, 2.) THF/hexane, room temp, 20 h;