Ligand-Free Nickel-Catalysed 1,4-Addition of Arylboronic Acids to α,β-Unsaturated Carbonyl Compounds
作者:Wen Chen、Lu Sun、Xi Huang、Jiayi Wang、Yanqing Peng、Gonghua Song
DOI:10.1002/adsc.201400761
日期:2015.5.4
catalytic system has been developed for the 1,4‐addition of arylboronic acids to α,β‐unsaturatedcarbonylcompounds. With catalyst loadings of 1–2 mol%, a series of 1,4‐adducts from chalcones and cinnamates was obtained in moderate to excellent yields within 5–30 min under a nitrogen atmosphere and microwave irradiation. The 1,4‐addition of arylboronic acids to acrylates is less efficient.
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
Palladium-catalyzed conjugate addition of arylsulfonyl hydrazides to α,β-unsaturated ketones
作者:Wen Chen、Hui Chen、Fuhong Xiao、Guo-Jun Deng
DOI:10.1039/c3ob40518d
日期:——
A palladium-catalyzed desulfitative–denitrogenative conjugate addition of arylsulfonylhydrazides to α,β-unsaturated ketones is described. The reaction showed very good selectivity and tolerated a wide range of functionalities under an atmosphere of oxygen with or without the aid of a metal co-oxidant.
An Atom-Economical Route to Substituted β-Arylethyl Ketones: Phosphomolybdic Acid-Catalyzed Carbohydroxylation of Terminal Alkynes in Organic Carbonate
作者:Guo-Ping Yang、Nan Zhang、Nuan-Nuan Ma、Bing Yu、Chang-Wen Hu
DOI:10.1002/adsc.201601231
日期:2017.3.20
efficient and atom‐economical route for the synthesis of substituted β‐arylethyl ketones was developed by using cheap phosphomolybdic acid (H3PMo12O40) as catalyst and non‐volatile propylene carbonate (PC) as green solvent via the carbohydroxylation of terminal alkynes with benzylicalcohols under mild conditions. Various functional groups on the benzylicalcohols and terminal alkynes were tolerated, giving
通过使用廉价的磷钼酸(H 3 PMo 12 O 40)作为催化剂和非挥发性碳酸亚丙酯(PC)作为绿色溶剂,开发了一种高效且原子经济的合成取代的β-芳基乙基酮的途径。在温和条件下,末端炔烃与苄醇的碳羟基化反应。可以耐受苄醇和末端炔烃上的各种官能团,从而以高至极佳的收率(高达95%)提供相应的取代的β-芳基乙基酮。值得注意的是,协议中的营业额(TON)达到520。机理研究表明,PC可以稳定杂多阴离子和碳正离子中间体,从而促进碳羟基化反应。