α-Functionalization of 2-Vinylpyridines via a Chiral Phosphine Catalyzed Enantioselective Cross Rauhut–Currier Reaction
作者:Cong Qin、Yonghai Liu、Yang Yu、Yiwei Fu、Hao Li、Wei Wang
DOI:10.1021/acs.orglett.8b00008
日期:2018.3.2
Herein, 2-vinylpyridines as a new type of electron-poor system for the asymmetric cross Rauhut–Currier reaction are reported. 2-Vinylpyridines are chemo- and enantioselectively activated by a newly designed chiral phosphine catalyst. The new reaction provides a powerful synthetic tool for accessing structurally diverse, highly valued chiral pyridine building blocks in good yields and with high enantioselectivities
在此,据报道2-乙烯基吡啶是一种用于不对称交叉Rauhut-Currier反应的新型电子贫乏系统。2-乙烯基吡啶被新设计的手性膦催化剂化学和对映选择性活化。新的反应为以高收率和高对映选择性获得结构多样的,高价值的手性吡啶构件提供了强大的合成工具。初步的机理研究表明,催化剂中的两个NH质子对于底物的协同活化和控制该反应的立体选择性至关重要。