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
Iron porphyrin-catalyzed C(SP3) -H activation for the formation of C O bond via cross-dehydrogenative coupling of cycloether and aromatic acid
作者:Wei-Hong Wen、An-Na Xie、Hua-Hua Wang、Dong-Xu Zhang、Atif Ali、Xiao Ying、Hai-Yang Liu
DOI:10.1016/j.tet.2017.10.046
日期:2017.12
achieved by using ironporphyrin as the catalyst and di-tert-butyl peroxide oxidant. The benzoic acid substrates bearing electron donating or withdrawing groups could react with cyclic ether smoothly to afford the desired products. It was found ironporphyrin catalyzed oxidative C (sp3)-H activating esterification had the advantage of short reaction time and low catalyst loading. The reaction had been proved
Copper-Catalyzed Esterification of Alkylbenzenes with Cyclic Ethers and Cycloalkanes via C(sp<sup>3</sup>)–H Activation Following Cross-Dehydrogenative Coupling
作者:Saroj Kumar Rout、Srimanta Guin、Wajid Ali、Anupal Gogoi、Bhisma K. Patel
DOI:10.1021/ol5011906
日期:2014.6.6
A copper-catalyzed cross-dehydrogenative coupling strategy has been developed for the synthesis of two classes of esters from simple solvents. The reaction of methylarenes with cyclic ethers resulted in alpha-acyloxy ethers involving four sp(3) C-H cleavages, while treatment of methylarenes with cycloalkanes led to the formation of allyl esters at the expense of six consecutive sp(3) C-H bonds.
Iron-Catalyzed Cross-Dehydrogenative Coupling Esterification of Unactive C(sp<sup>3</sup>)–H Bonds with Carboxylic Acids for the Synthesis of α-Acyloxy Ethers
作者:Jincan Zhao、Hong Fang、Wei Zhou、Jianlin Han、Yi Pan
DOI:10.1021/jo500192h
日期:2014.5.2
An iron-catalyzed oxidative esterification reaction between unactivated C(sp3)–H bonds from symmetric and asymmetric ethers and carboxylic acids using di-tert-butyl peroxide (DTBP) as the oxidant via a crossdehydrogenativecoupling (CDC) reaction was established, which tolerates a wide range of cyclic ether substrates to react with aromatic acids and phenylacetic acid, providing an efficient method