Chem. J. Chinese Universities ›› 2021, Vol. 42 ›› Issue (9): 2772.doi: 10.7503/cjcu20210297

• Organic Chemistry • Previous Articles     Next Articles

Na2CO3-catalyzed 1,6-Conjugate Addition of Trimethylsilyl Azide to δ-CF3-δ-Aryl-disubstituted Para-Quinone Methides: Efficient Construction of Diarylmethanes Bearing CF3- and N3-Substituted Quaternary Stereocenters

LIU Huazheng1, PAN Xiaoguang2, LI Hua2, WAN Renzhong1(), LIU Xigong2()   

  1. 1.College of Animal Science and Veterinary Medicine,Shandong Agricultural University,Taian 271018,China
    2.School of Chemistry and Chemical Engineering,Shandong University,Jinan 250100,China
  • Received:2021-04-30 Online:2021-09-10 Published:2021-09-08
  • Contact: WAN Renzhong E-mail:wrzh63@163.com;liuxigong@sdu.edu.cn
  • Supported by:
    the National Natural Science Foundation of China(21801093);the China Postdoctoral Science Foundation(2019M662321)

Abstract:

Organic azides have emerged as significant and versatile reactants in organic synthesis and have been widely used in the field of chemical biology, pharmaceutical discovery, and materials science. Trifluoromethylated compounds were recognized as key structural motifs in bioactive molecules and synthetic pharmaceuticals. The incorporation of a trifluoromethyl group into organic molecules is often beneficial for improving their physiochemical properties such as metabolic stability, lipophilicity, and bioavailability. As a consequence, the development of efficient methods for the synthesis of molecules containing both the trifluoromethyl group and the azide group is highly desired. However, only a few of synthetic methods were reported for the synthesis of these structures. On the other hand, diarylmethane derivatives spread across natural products, pharmaceuticals and functional materials, and their synthesis was attracted great attention owning to the diverse biological and medical properties. Described is an efficient azidative aromatization process of δ-CF3-δ-aryl-disubstituted para-quinone methides with trimethylsilyl azide. Using Na2CO3 as catalyst, 1,6-conjugate addition of trimethylsilyl azide to δ-CF3-δ-aryl-substituted para-quinone methides went smoothly, delivering diarylmethanes bearing δ-CF3- and N3-substituted stereocenters in excellent yields. Moreover, the reaction displays a broad substrate scope and excellent functional group tolerance.

Key words: Diarylmethane, Azide, δ-CF3-δ-aryl-substituted, 1, 6-Conjugate addition

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