Highly diastereo- and enantioselective construction of phthalide-oxindole hybrids bearing vicinal quaternary chiral centers via an organocatalytic allylic alkylation
作者:Wei Liu、Zhi-Peng Hu、Yan Yan、Wei-Wei Liao
DOI:10.1016/j.tetlet.2018.07.002
日期:2018.8
A diastereo- and enantioselective synthesis of phthalide-oxindole hybrids including congested adjacent quaternary chiral centers was demonstrated through a Lewisbase catalyzed asymmetricallylicalkylation reaction of Morita–Baylis–Hillman carbonates of isatins and 3-cyanophthalides. The various hybrid molecules with two valuable pharmacophores-combined frameworks can be obtained in good to high diastereo-
Asymmetric Synthesis of Dihydronaphthoquinones Containing Adjacent Stereocenters via a Sulfa-Michael Addition Triggered Ring-Expansion Approach
作者:Zhi-Peng Hu、Zhe Zhuang、Wei-Wei Liao
DOI:10.1021/acs.joc.5b00502
日期:2015.5.1
A novel asymmetric synthetic approach for the construction of enantioenriched functionalized dihydroquinones incorporating adjacent quaternary and tertiary stereocenters has been reported, in which enantioenriched 3-allylic phthalides engaged in an unprecedented sulfa-Michael addition-triggered Stereoselective ring-expansion reaction, and furnished the desired sulfur-incoporated dihydronaphthoquinones with high stereoselectivity.