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Tengrui Yuan

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Articles

Dearomative (3 + 2) Cycloaddition of Indoles for the Stereoselective Assembly of Fully Functionalized Cyclopentanoids

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By Tengrui Yuan, Kristof Van Hecke, Johan M. Winne
| dx.doi.org
CCDC 2340696–2340697 contain the supplementary crystallographic data for this paper. These data can be obtained free of charge via www.ccdc.cam.ac.uk/data_request/cif, or by emailing data_request@ccdc.cam.ac.uk, or by contacting The Cambridge Crystallographic Data Centre, 12 Union Road, Cambridge CB2 1EZ, UK; fax: +44 1223 336033. Terms & Conditions Most electronic Supporting Information files are available without a subscription to ACS Web Editions.
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Stereoselective Gold(I)‐Catalyzed Vinylcyclopropanation via Generation of a Sulfur‐Substituted Vinyl Carbene Equivalent

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By Tengrui Yuan, Bram Ryckaert, Kristof Van Hecke, Jan Hullaert
| Color Research & Application Verified
Communication PDF ShareShare Abstract A stereoselective gold(I)‐catalyzed vinylcyclopropanation of alkenes has been developed. A gold‐coordinated cationic vinyl carbene species, readily generated via a rearrangement of the ethylenedithioacetal of propargyl aldehyde, reacts with a wide range of alkenes to afford thio‐substituted vinylcyclopropanes.
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Chiral Primary Amine Catalysis for Asymmetric Mannich Reactions of Aldehydes with Ketimines: Stereoselectivity and Reactivity

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By Jun Dai, Juan Liu, Tao Chen, Zhihui Shao, Dan Xiong, Tengrui Yuan
| Color Research & Application Verified
The application potential of primary amine catalysts in the context of Mannich reactions of aldehydes with ketimines is exemplified by isatin-derived ketimines and cyclic trifluoromethyl ketimines. Primary amine catalysts exhibit either unusual stereoselectivity or reactivity, which is not observable with secondary amine catalysts. Moreover, reversal of diastereofacial selectivity between primary and secondary amine catalysts is disclosed.
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