Synthesis 2020; 52(01): 85-97
DOI: 10.1055/s-0037-1610728
paper
© Georg Thieme Verlag Stuttgart · New York

DBU-Catalyzed Inter- and Intramolecular Double Michael Addition of Donor–Acceptor Chromone-Pyrazolone/Benzofuranone Synthons: Access to Spiro-Pyrazolone/Benzofuranone-Hexahydroxanthone Hybrids

Authors

  • Qi Di Wei §

    a   Guizhou Engineering Center for Innovative Traditional Chinese Medicine and Ethnic Medicine, Guizhou University, Guiyang, Guizhou 550025, P. R. of China   Email: xlliu1@gzu.edu.cn
  • Yi-Ming Yao §

    a   Guizhou Engineering Center for Innovative Traditional Chinese Medicine and Ethnic Medicine, Guizhou University, Guiyang, Guizhou 550025, P. R. of China   Email: xlliu1@gzu.edu.cn
  • Shun-Qin Chang

    a   Guizhou Engineering Center for Innovative Traditional Chinese Medicine and Ethnic Medicine, Guizhou University, Guiyang, Guizhou 550025, P. R. of China   Email: xlliu1@gzu.edu.cn
  • Wu-De Yang

    b   College of Pharmaceutical Sciences, Guizhou University of Traditional Chinese Medicine, Guiyang, Guizhou 550025, P. R. of China
  • Min-Yi Tian

    a   Guizhou Engineering Center for Innovative Traditional Chinese Medicine and Ethnic Medicine, Guizhou University, Guiyang, Guizhou 550025, P. R. of China   Email: xlliu1@gzu.edu.cn
  • Xiong-Li Liu

    a   Guizhou Engineering Center for Innovative Traditional Chinese Medicine and Ethnic Medicine, Guizhou University, Guiyang, Guizhou 550025, P. R. of China   Email: xlliu1@gzu.edu.cn
  • Ying Zhou

    b   College of Pharmaceutical Sciences, Guizhou University of Traditional Chinese Medicine, Guiyang, Guizhou 550025, P. R. of China

This work received financial support from National Nature Science Foundation of China (81760625, 81660576 and 81560563) and Projects of Guizhou Province ([2016]5623, JG[2016]06, [2019]1402, [2017]5609 and [2018]5781).
Further Information

Publication History

Received: 27 June 2019

Accepted after revision: 18 August 2019

Publication Date:
13 September 2019 (online)


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§ These two authors contributed equally to this work.

Abstract

A DBU-catalyzed inter- and intramolecular double Michael addition of donor–acceptor chromone-pyrazolone/benzofuranone synthons and 3-methyl-4-nitro-5-alkenylisoxazoles has been established, which constructed structurally diverse spiro-pyrazolone/benzofuranone-hexahydroxanthone hybrids bearing five consecutive stereocenters in good yields (up to 91%) with high diastereoselectivities (up to >20:1 dr). Moreover, this strategy further expanded the synthetic potential of bifunctional donor–acceptor chromones, and demonstrated great potential for applications in medicinal chemistry.

Supporting Information