Synthesis 2021; 53(09): 1597-1604
DOI: 10.1055/s-0040-1705976
paper

An Efficient Substrate-Induced Method for the Synthesis of CF3-Substituted Cyclopropanes by Metal-Free Reaction of Trifluoromethyl Styrylisoxazoles with Nitromethane

Authors

  • Qing-he Zhao

    a   Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Bejing 100700, P. R. of China
  • Guang-hao Yu

    a   Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Bejing 100700, P. R. of China
  • Ye-chen Meng

    c   Hengshui No. 5 Middle School, Shengli West Road, Hengshui, Hebei Province, P. R. of China
  • Feng Sui

    a   Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Bejing 100700, P. R. of China
  • Mi-yi Yang

    a   Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Bejing 100700, P. R. of China
  • Li Liu

    a   Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Bejing 100700, P. R. of China
  • Hui-jie Li

    a   Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Bejing 100700, P. R. of China
  • Feng Li

    b   College of Chemistry and Chemical Engineering, Shangqiu Normal University, 298 Wenhua Road, Shangqiu, Henan 476000, P. R. of China
  • Hai Ma

    a   Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Bejing 100700, P. R. of China

We thank the Voluntary Program of China Academy of Chinese Medical Sciences (ZZ0908028) for financial support.


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Abstract

A series of (trifluoromethyl)cyclopropanes (TFCPs) tolerating a broad range of functional groups, known as tert-butyl bioisosteres, have been obtained from the cyclization reaction between nitromethane­ and 5-[β-(trifluoromethyl)styryl]isoxazoles in 70–94% yields and 75:25 to 90:10 dr. This method offers practical access to this cyclopropyl moiety of pharmacological interest, employing an inorganic base under phase-transfer conditions.

Supporting Information



Publikationsverlauf

Eingereicht: 02. Oktober 2020

Angenommen nach Revision: 21. Oktober 2020

Artikel online veröffentlicht:
19. November 2020

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