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Updated: Jun 24, 2026
![Cercosporin-Photocatalyzed [4+1]- and [4+2]-Annulations of Azoalkenes Under Mild Conditions](/_next/image?url=https%3A%2F%2Fcloudfront.jove.com%2FCDNSource%2Fteasers%2F60786.jpg&w=3840&q=50)
Cercosporin-Photocatalyzed [4+1]- and [4+2]-Annulations of Azoalkenes Under Mild Conditions
Published on: July 17, 2020
H-Terminated Catellani Strategy to Aryl β-Ethanol Enables Collective Total Syntheses of Pyranonaphthoquinone Natural
Wanbin Song1, Chen Zhang2, Zecheng Jin2
1School of Pharmaceutical Sciences, Zhejiang Chinese Medical University, Hangzhou 311402, China.
Abstract:
We report an ipso-H-terminated variant using inexpensive formate as the terminating reagent. Coupling with diverse epoxides provides complementary access to valuable aryl β-ethanols with high regioselectivity. Integration with oxa-Pictet-Spengler and Ullmann reactions enables a collective total synthesis of pyranonaphthoquinone natural products. This strategy features significantly reduced synthetic steps, improved overall yields, and robust conditions, establishing a modular platform for structurally diverse aryl ethanol scaffolds and facilitating systematic bioactivity studies.
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