Synthesis of chiral γ-lactams via Rh(II) catalyzed intramolecular C–H insertion: α-substituents and conformational effects
作者:David L. Flanigan、Cheol Hwan Yoon、Kyung Woon Jung
DOI:10.1016/j.tetlet.2004.10.159
日期:2005.1
γ-lactams are efficiently synthesized via Rh(II) catalyzed intramolecular C–H insertion from various α-diazoamides. Independent of α-substituents, regio- and stereoselectivities are enhanced through a conformational effect exerted by a bicyclic transition state.
高度官能化的手性γ-内酰胺可以通过Rh(II)催化的各种C-H分子内插入各种α-重氮酰胺来合成。独立于α-取代基,通过双环过渡态所产生的构象效应增强了区域选择性和立体选择性。