Catalytic Asymmetric Claisen Rearrangement of Enolphosphonates: Construction of Vicinal Tertiary and All-Carbon Quaternary Centers
作者:Jiajing Tan、Cheol-Hong Cheon、Hisashi Yamamoto
DOI:10.1002/anie.201203092
日期:2012.8.13
A copper‐catalyzed enantioselective Claisen rearrangement of easily accessible enolphosphonates using the commercially available PhBOX as the chiral ligand was developed. A wide range of rearrangement products with contiguous tertiary and all‐carbon quaternary centers were obtained in excellent yields and stereoselectivities. The α‐ketophosphonate substituent in the products could be easily transformed
开发了使用市售 PhBOX 作为手性配体的铜催化的对映选择性克莱森重排易于获得的烯醇膦酸酯。以优异的产率和立体选择性获得了一系列具有连续三级和全碳四级中心的重排产物。产物中的α-酮膦酸酯取代基很容易转化为其他官能团。