A General, Scalable, Organocatalytic Nitro-Michael Addition to Enones: Enantioselective Access to All-Carbon Quaternary Stereocenters
作者:Xiaodong Gu、Yuanyuan Dai、Tingting Guo、Allegra Franchino、Darren J. Dixon、Jinxing Ye
DOI:10.1021/acs.orglett.5b00387
日期:2015.3.20
Michael addition of nitromethane to five-, six-, and seven-membered β-substituted cyclic enones with excellent enantioselectivity, offering scalable, asymmetric access to all-carbon quaternary stereocenters. The reaction scope can be expanded to include linear acyclic enones, and excellent levels of enantioselectivity are also observed. Furthermore, this organocatalytic, asymmetric nitro-Michael reaction
甲叔-亮氨酸衍生的手性二胺催化不对称迈克尔加成硝基甲烷到五,六,七元β取代的环状烯酮具有优异的对映选择性,提供可扩展的,不对称访问所有碳季立体。反应范围可以扩大到包括线性无环烯酮,并且还观察到极好的对映选择性。此外,这种有机催化,不对称的硝基-迈克尔反应适合于多克级放大,并适用于制备杜鹃花倍半萜骨架。