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Peer reviewed
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Yang, Qian-Qian; Xiao, Wei; Du, Wei; Ouyang, Qin; Chen, Ying-Chun
Chemical communications (Cambridge, England), 2018, Volume: 54, Issue: 9Journal Article
An efficient double catalytic system, combining chiral amine and 2-mercaptobenzoic acid, is applied for α',β-regioselective 4+2 annulations of 2-cyclopentenone with a diversity of activated alkenes, constructing multifunctional chiral bicycle2,2,1heptane scaffolds in good to excellent yields and enantioselectivities. In comparison with the traditional cross-dienamine species between 2-cyclopentenone and chiral amine, the interrupted enamine intermediate containing a covalently linked thiol catalyst shows significantly improved reactivity.
![Asymmetric [4+2] annulation...](http://api.summon.serialssolutions.com/2.0.0/image/issn/XR4PS5YY4K/1359-7345/medium "Asymmetric [4+2] annulations to construct norcamphor scaffolds with 2-cyclopentenone via double amine-thiol catalysis")
