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Updated: Jan 10, 2026
![[DPEPhosbcpCu]PF6: A General and Broadly Applicable Copper-Based Photoredox Catalyst](/_next/image?url=https%3A%2F%2Fcloudfront.jove.com%2FCDNSource%2Fteasers%2F59739.jpg&w=3840&q=50)
[DPEPhosbcpCu]PF6: A General and Broadly Applicable Copper-Based Photoredox Catalyst
Published on: May 21, 2019
Copper-Mediated Radical Cyclopropanation of Activated Alkenes under Continuous-Flow Conditions
Jilong Fu1, Ronghui Luo1, Feng Chen1
1College of Biotechnology and Pharmaceutical Engineering, State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University, Nanjing 211816, China.
Abstract:
Polysubstituted cyclopropanes are valuable in complex molecule synthesis but challenging to access due to low atom economy and harsh conditions. Herein, we report a copper-mediated, peroxide-initiated cyclopropanation of activated alkenes with active methylene compounds via a radical pathway. This diazo-free, prefunctionalization-free method, integrated with continuous flow, enhances safety, scalability, and efficiency. Operable under mild conditions with broad substrate scope, it offers a practical and atom-economical route to diverse polysubstituted cyclopropanes.
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