1: 5-chloro-thien-2-yl chloride With TMPMgCl*LiCl in tetrahydrofuran T=25°C; 0.5 h; Inert atmosphere; 2: With CuCN*2LiCl in tetrahydrofuran 0.25 h; Inert atmosphere; 3: benzoyl chloride in tetrahydrofuran T=-30 - 25°C;