Bu4NI-catalyzed decarboxylative acyloxylation of an sp3 C–H bond adjacent to a heteroatom with α-oxocarboxylic acids
作者:Shuai Zhang、Li-Na Guo、Hua Wang、Xin-Hua Duan
DOI:10.1039/c3ob40748a
日期:——
A novel metal-free decarboxylative acyloxylation of an sp3 CâH bond in formamides and ethers has been explored. A variety of N-acyloxymethylamides and α-acyloxy ethers could be easily synthesized by this method. Preliminary mechanistic studies have shown that the reaction proceeded via a radical process.
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