Visible-Light-Promoted Photocatalyst-Free Hydroacylation and Diacylation of Alkenes Tuned by NiCl<sub>2</sub>·DME
作者:Xinxin Zhao、Bing Li、Wujiong Xia
DOI:10.1021/acs.orglett.9b04595
日期:2020.2.7
4-dihydropyridines via an acyl radical addition and hydrogen atom transfer pathway under photocatalyst-free conditions. The efficiency was highlighted by wide substrate scope, good to high yields, successful scale-up experiments, and expedient preparation of highly functionalized ketone derivatives. In addition, this protocol allows for the synthesis of 1,4-dicarbonyl compounds through alkene diacylation in the presence
The α-alkylation of ketones with alcohols in pure water catalyzed by a water-soluble Cp*Ir complex bearing a functional ligand
作者:Chong Meng、Jing Xu、Yawen Tang、Yao Ai、Feng Li
DOI:10.1039/c9nj03345a
日期:——
A water-soluble dinuclear Cp*Ir complex bearing 4,4′,6,6′-tetrahydroxy-2,2′-bipyrimidine as a bridging ligand was found to be a highly effective catalyst for the α-alkylation of ketones with alcohols in pure water. In the presence of catalyst (0.5 mol%), a series of desirable products were obtained with high reaction economy under environmentally benign conditions. The importance of the hydroxy group
Photocatalytic decarboxylative coupling between α-oxocarboxylicacids and alkenes
作者:Ziyue Chen、Fangling Lu、Feng Yuan、Juanjuan Sun、Linyu Du、Zhen Li、Meng Gao、Renyi Shi、Aiwen Lei
DOI:10.1007/s11426-019-9616-8
日期:2019.11
in running decarboxylation to construct ketone derivatives. In this article, we have developed a photocatalytic decarboxylative cross-coupling of α-oxocarboxylicacids and olefins to the synthesis of diverse aryl ketones. Various alkenes and α-oxocarboxylicacids were compatible, generating the desired products in up to 90% yield. Preliminary mechanism studies suggest that a freeradical pathway is involved
NNN Pincer Ru(II)-Complex-Catalyzed α-Alkylation of Ketones with Alcohols
作者:Xiao-Niu Cao、Xiao-Min Wan、Fa-Liu Yang、Ke Li、Xin-Qi Hao、Tian Shao、Xinju Zhu、Mao-Ping Song
DOI:10.1021/acs.joc.8b00013
日期:2018.4.6
C–C bonds using alcohols as the alkylating agents, generating water as the only byproduct. A broad range of substrates, including (hetero)aryl- or alkyl-ketones and alcohols, were well tolerated under the optimized conditions. Notably, α-substituted methylene ketones were also investigated, which afforded α-branched steric hindrance products. A potential application of α-alkylation of methylene acetone