Volume 52, Issue 33 pp. 8607-8610
Communication

N-Heterocyclic Carbene Catalyzed [4+3] Annulation of Enals and o-Quinone Methides: Highly Enantioselective Synthesis of Benzo-ε-Lactones

Prof. Dr. Hui Lv

Prof. Dr. Hui Lv

Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190 (China)

Key Laboratory for Green Chemical Process of Ministry of Education, School of material science and Engineering, Wuhan Institute of Technology, Wuhan, 430073 (China)

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Wen-Qiang Jia

Wen-Qiang Jia

Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190 (China)

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Li-Hui Sun

Li-Hui Sun

Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190 (China)

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Prof. Dr. Song Ye

Corresponding Author

Prof. Dr. Song Ye

Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190 (China)

Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190 (China)Search for more papers by this author
First published: 01 July 2013
Citations: 285

Financial support from the Ministry of Science and Technology of China (2011CB808600), National Natural Science Foundation of China (No. 21072195, 20932008), and the Chinese Academy of Sciences is gratefully acknowledged.

Graphical Abstract

Enantioselectivity through H bonding: An unprecedented [4+3] annulation of enals with o-quinone methides catalyzed by N-heterocyclic carbenes (NHCs) to give benzo-ε-lactones is described. High to excellent enantioselectivity was achieved by using a chiral triazolium NHC having a free OH group, which participates in a hydrogen-bonding interaction with the substrate.

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