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■ Copper Corrole Catalyzed Esterification of C(sp3)-H with Carboxylic Acids via Cross-Dehydrogenative Coupling Reaction

Zhao-Yang Liu, Wei-Yu Peng, Waseem Akram, Jia-Wei Lai, Hao Zhang, and Hai-Yang Liu

*Department of Chemistry, The Key Laboratory of Fuel Cell Technology of Guangdong Province, South China University of Technology, Guangzhou 510640, China

Abstract

Copper corrole complex was firstly used as catalyst for oxidative esterification of un-reactive C(sp3)-H bond of cyclic ether and carboxylic acid via cross dehydrogenative coupling (CDC) reaction using di-tert-butyl peroxide (DTBP) as oxidant. A wide range of carboxylic acids can react with cyclic ether with good to excellent yields, showing copper corrole is a new kind of promising catalyst for CDC reaction. Under gram-level test, the turnover number (TON) may achieve 8400 with 84% yield at only 0.01% catalyst loading, demonstrating its practical uses.