in benzene Norrish type-II reaction; IrradiationInert atmosphere; optical yield given as percent de;

1: Methyltriphenylphosphonium bromide With n-butyllithium in diethyl ether; hexane T=20°C; 0.5 h; 2: α-methyl-γ-phenylbutyrophenone in diethyl ether; hexane T=20°C; 24 h;