Construction of Polyfunctionalized 6–5–5 Fused Tricyclic Carbocycles via One-Pot Sequential Semipinacol Rearrangement/Michael Addition/Henry Reaction
作者:Fu-Ping Zhu、Xiang Guo、Fu-Min Zhang、Xiao-Ming Zhang、Hong Wang、Yong-Qiang Tu
DOI:10.1021/acs.orglett.0c00565
日期:2020.3.6
A novel one-pot semipinacol rearrangement/Michael addition/Henry reaction of vinylogous α-ketols with nitroolefins has been achieved through the promotion of two Lewis acids, namely, TMSOTf and TiCl4, at temperatures between 0 and −78 °C. A range of synthetically challenging polyfunctionalized 6–5–5 and 7–5–5 fused tricyclic carbocycles bearing up to five continuous stereocenters, including one quaternary