The catalytic asymmetric insertion reaction of α-diazocarbonyl compounds into XÀH bonds (X= C, N, P, O, S, etc.) has attracted much attention because it provides an efficient way to construct versatile and useful building blocks.[1] In contrast to the extensive and fruitful studies on asymmetric CÀH insertion,[2] the investigation of enantioselective insertion of α- diazocarbonyl compounds into heteroatom–hydrogen bonds (XÀH) is still limited.[3] This ...
