Volume 21, Issue 42 p. 14723-14727
Communication

Organic Photocatalytic Cyclization of Polyenes: A Visible-Light-Mediated Radical Cascade Approach

Zhongbo Yang

Zhongbo Yang

Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, The Chinese Academy of Sciences, Beijing, 100190 (China), Fax: (+86)-10-6255-4449 http://luosz.iccas.ac.cn

Collaborative Innovation Center of Chemical Science and Engineering, Tianjin, 300071 (China)

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Han Li

Han Li

Center of Basic Molecular Science (CBMS) Department of Chemistry, Tsinghua University, Beijing, 100084 (China)

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Dr. Long Zhang

Dr. Long Zhang

Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, The Chinese Academy of Sciences, Beijing, 100190 (China), Fax: (+86)-10-6255-4449 http://luosz.iccas.ac.cn

Collaborative Innovation Center of Chemical Science and Engineering, Tianjin, 300071 (China)

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Prof. Ming-Tian Zhang

Corresponding Author

Prof. Ming-Tian Zhang

Center of Basic Molecular Science (CBMS) Department of Chemistry, Tsinghua University, Beijing, 100084 (China)

Ming-Tian Zhang, Center of Basic Molecular Science (CBMS) Department of Chemistry, Tsinghua University, Beijing, 100084 (China)

Sanzhong Luo, Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, The Chinese Academy of Sciences, Beijing, 100190 (China), Fax: (+86)-10-6255-4449http://luosz.iccas.ac.cn

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Prof. Dr. Jin-Pei Cheng

Prof. Dr. Jin-Pei Cheng

Center of Basic Molecular Science (CBMS) Department of Chemistry, Tsinghua University, Beijing, 100084 (China)

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Prof. Dr. Sanzhong Luo

Corresponding Author

Prof. Dr. Sanzhong Luo

Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, The Chinese Academy of Sciences, Beijing, 100190 (China), Fax: (+86)-10-6255-4449 http://luosz.iccas.ac.cn

Collaborative Innovation Center of Chemical Science and Engineering, Tianjin, 300071 (China)

Ming-Tian Zhang, Center of Basic Molecular Science (CBMS) Department of Chemistry, Tsinghua University, Beijing, 100084 (China)

Sanzhong Luo, Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, The Chinese Academy of Sciences, Beijing, 100190 (China), Fax: (+86)-10-6255-4449http://luosz.iccas.ac.cn

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First published: 01 September 2015
Citations: 28

Graphical Abstract

A visible improvement: A visible-light-mediated, organic photocatalytic radical cascade cyclization of polyprenoids has been developed. By combination of eosin Y as photocatalyst and hexafluoro-2-propanol as solvent, the desired cascade cyclization products are obtained in good yields and high stereoselectivities (see scheme; HFIP=hexafluoro-2-propanol).

Abstract

A visible-light-mediated, organic photocatalytic stereoselective radical cascade cyclization of polyprenoids is described. The desired cascade cyclization products are achieved in good yields and high stereoselectivities with eosin Y as photocatalyst in hexafluoro-2-propanol. The catalyst system is also suitable for 1,3-dicarbonyl compounds, which require only catalytic amounts of LiBr to promote the formation of the corresponding enols.