Synthesis 2013; 45(20): 2832-2842
DOI: 10.1055/s-0033-1338517
paper
© Georg Thieme Verlag Stuttgart · New York

Enantioselective Michael Addition of 1,3-Diketones to Arenesulfonylalkylindoles: A Flexible Gateway to Optically Active 3-sec-Alkyl-Substituted Indoles Containing a Pyrazole Skeleton

Authors

  • Zongle Zuo

    a   Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province, China West Normal University, Nanchong 637002, P. R. of China   Fax: +86(817)2568081   eMail: jlhhxg@cwnu.edu.cn
  • Shilu Zhang

    b   Analytical Experimental Center of North Sichuan Medical College, Nanchong 637007, P. R. of China
  • Rongming Wang

    a   Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province, China West Normal University, Nanchong 637002, P. R. of China   Fax: +86(817)2568081   eMail: jlhhxg@cwnu.edu.cn
  • Wujun He

    a   Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province, China West Normal University, Nanchong 637002, P. R. of China   Fax: +86(817)2568081   eMail: jlhhxg@cwnu.edu.cn
  • Song Wu

    a   Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province, China West Normal University, Nanchong 637002, P. R. of China   Fax: +86(817)2568081   eMail: jlhhxg@cwnu.edu.cn
  • Xiaohua Xie

    a   Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province, China West Normal University, Nanchong 637002, P. R. of China   Fax: +86(817)2568081   eMail: jlhhxg@cwnu.edu.cn
  • Dabin Qin

    a   Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province, China West Normal University, Nanchong 637002, P. R. of China   Fax: +86(817)2568081   eMail: jlhhxg@cwnu.edu.cn
  • Linhai Jing*

    a   Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province, China West Normal University, Nanchong 637002, P. R. of China   Fax: +86(817)2568081   eMail: jlhhxg@cwnu.edu.cn
Weitere Informationen

Publikationsverlauf

Received: 04. Juli 2013

Accepted: 17. Juli 2013

Publikationsdatum:
07. August 2013 (online)


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Abstract

Enantioselective Michael addition of 1,3-diketones to alkylideneindolenines generated in situ from arenesulfonylalkylindoles is described, and a series of optically active C3-alkyl-substituted indole derivatives has been obtained. The resulting adducts can be readily converted into 3-sec-alkyl-substituted indoles containing a pyrazole skeleton, with direct connection between the α- and 4-positions, without decrease of the enantioselectivity.

Supporting Information