Synthesis 2022; 54(21): 4691-4702
DOI: 10.1055/a-1799-0459
special topic
Asymmetric C–H Functionalization

Eight-Step Asymmetric Synthesis of (–)-Berkelic Acid

Authors

  • Zhenjie Yang

    a   Sauvage Center for Molecular Sciences, Engineering Research Center of Organosilicon Compounds & Materials (Ministry of Education), Hubei Key Lab on Organic and Polymeric Opto-Electronic Materials, College of Chemistry and Molecular Sciences, Wuhan University, 430072, Wuhan, P. R. of China
  • Hong-Gang Cheng

    a   Sauvage Center for Molecular Sciences, Engineering Research Center of Organosilicon Compounds & Materials (Ministry of Education), Hubei Key Lab on Organic and Polymeric Opto-Electronic Materials, College of Chemistry and Molecular Sciences, Wuhan University, 430072, Wuhan, P. R. of China
  • Ruiming Chen

    a   Sauvage Center for Molecular Sciences, Engineering Research Center of Organosilicon Compounds & Materials (Ministry of Education), Hubei Key Lab on Organic and Polymeric Opto-Electronic Materials, College of Chemistry and Molecular Sciences, Wuhan University, 430072, Wuhan, P. R. of China
  • Liming Cao

    a   Sauvage Center for Molecular Sciences, Engineering Research Center of Organosilicon Compounds & Materials (Ministry of Education), Hubei Key Lab on Organic and Polymeric Opto-Electronic Materials, College of Chemistry and Molecular Sciences, Wuhan University, 430072, Wuhan, P. R. of China
  • Qiang Wei

    a   Sauvage Center for Molecular Sciences, Engineering Research Center of Organosilicon Compounds & Materials (Ministry of Education), Hubei Key Lab on Organic and Polymeric Opto-Electronic Materials, College of Chemistry and Molecular Sciences, Wuhan University, 430072, Wuhan, P. R. of China
  • Qingqing Wang

    a   Sauvage Center for Molecular Sciences, Engineering Research Center of Organosilicon Compounds & Materials (Ministry of Education), Hubei Key Lab on Organic and Polymeric Opto-Electronic Materials, College of Chemistry and Molecular Sciences, Wuhan University, 430072, Wuhan, P. R. of China
  • Qianghui Zhou

    a   Sauvage Center for Molecular Sciences, Engineering Research Center of Organosilicon Compounds & Materials (Ministry of Education), Hubei Key Lab on Organic and Polymeric Opto-Electronic Materials, College of Chemistry and Molecular Sciences, Wuhan University, 430072, Wuhan, P. R. of China
    b   The Institute for Advanced Studies, Wuhan University, 430072, Wuhan, P. R. of China
    c   State Key Laboratory of Bio-Organic and Natural Products Chemistry, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, 345 Ling Ling Rd, Shanghai 200032, P. R. of China

This work is supported by the Fundamental Research Funds for the Central Universities (2042020kf0039 and 2042021kf0214), the National­ Natural Science Foundation of China (Grants 21801193, 21871213, and 22071189) and the startup funding from Wuhan University.


Graphical Abstract

Abstract

We herein report an eight-step asymmetric synthesis of (–)-berkelic acid. This work features a sequential Catellani-type reaction/oxa-Michael addition with epoxides as dual-functionalized alkylating reagents for synthesizing the isochroman framework, a one-pot, acid-catalyzed deprotection/spiroacetalization process for the construction of a tetracyclic core intermediate, and a late-stage Ni-catalyzed reductive coupling reaction for the installation of the side chain. Remarkably, during the deprotection/spiroacetalization process, four new stereocenters are created with high stereocontrol from a single existing chiral center.

Supporting Information



Publication History

Received: 25 February 2022

Accepted after revision: 15 March 2022

Accepted Manuscript online:
15 March 2022

Article published online:
19 May 2022

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