Takai–Utimoto reactions of oxoalkylhalides catalytic in chromium and cobalt

The scope of chromium(II)/cobalt(I)-catalyzed Takai–Utimoto reactions was extended to substrates with unprotected reactive functional groups. In the presence of a higher chlorosilane and manganese the first chromium(II)/cobalt(I)-catalyzed version for the coupling of oxoalkylhalides with aldehydes resulted.