Synthesis 2018; 50(12): 2385-2393
DOI: 10.1055/s-0037-1609480
paper
© Georg Thieme Verlag Stuttgart · New York

Synthesis of Isoxazolines and Isoxazoles via Metal-Free Desulfitative Cyclization

Authors

  • Jiaxin Cheng

    a   Department of Medicinal Chemistry, West China School of Pharmacy, Sichuan University, Chengdu, Sichuan, 610041, P. R. of China   eMail: lhe2001@sina.com
  • Ze Yang

    a   Department of Medicinal Chemistry, West China School of Pharmacy, Sichuan University, Chengdu, Sichuan, 610041, P. R. of China   eMail: lhe2001@sina.com
  • Yuansheng Li

    a   Department of Medicinal Chemistry, West China School of Pharmacy, Sichuan University, Chengdu, Sichuan, 610041, P. R. of China   eMail: lhe2001@sina.com
  • Yulan Xi

    a   Department of Medicinal Chemistry, West China School of Pharmacy, Sichuan University, Chengdu, Sichuan, 610041, P. R. of China   eMail: lhe2001@sina.com
  • Qiu Sun*

    b   West China Medical Center of Sichuan University, Chengdu, Sichuan, 610041, P. R. of China   eMail: sunqiu@scu.edu.cn
  • Ling He*

    a   Department of Medicinal Chemistry, West China School of Pharmacy, Sichuan University, Chengdu, Sichuan, 610041, P. R. of China   eMail: lhe2001@sina.com

We gratefully acknowledge the financial support from the National Science Foundation of China (No. 21072131) and Sichuan University–Lu Zhou Strategic Cooperation Projects (No. 2013 CDLZ-S18).
Weitere Informationen

Publikationsverlauf

Received: 03. Februar 2018

Accepted after revision: 09. März 2018

Publikationsdatum:
14. Mai 2018 (online)


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Abstract

A novel, one-pot reaction for the synthesis of isoxazolines and isoxazoles is developed via a cascade process under metal-free conditions. The approach involves the formation of intramolecular C–N and C–O bonds and intermolecular C–C bonds from aromatic alkenes or alkynes and N-hydroxysulfonamides using hypervalent iodine(VII) and iodine as the oxidant. Activation of C–H and C–C bonds/construction of C–O bonds/elimination of SO2/C–N bond formation is achieved in sequence­ in the reaction system.