1: RLi or RMgBr, R = Ph With indium(III) chloride in tetrahydrofuran T=-78°C; 0.5 h; Inert atmosphere; 2: C23H18O3S With Ni(PCy3)2Cl2; tri-cyclo-hexyl-phosphine in tetrahydrofuran T=20 - 80°C; Inert atmosphere;