1: With N,N,N',N',N'',N''-hexamethylphosphoric triamide; n-butyllithium in tetrahydrofuran; hexane T=-78°C; 0.25 h; 2: With Mukayama reagent in tetrahydrofuran; hexane T=-78°C; 0.5 h; Further stages.;

T=600°C; P=0.01 Torr; 1 h; Flash photolysis;