Nano copper oxide mediated ligand-free C–S cross-coupling and concomitant oxidative aromatization of 4-aryl-3,4-dihydropyrimidin-2(1H)-thione with diaryliodonium salts
摘要:
A wide range of Biginelli 4-aryl-3,4-dihydropyrimidin-2(1H)-thiones undergo ligand-free C-S cross-coupling with diaryliodonium triflates in the presence of CuO nanoparticles with the concomitant oxidative aromatization to form highly substituted 2-(thioaryl)pyrimidine. The nano CuO catalyst can be recycled and reused three times without any significant loss of catalytic activity. (C) 2012 Elsevier Ltd. All rights reserved.
Chemo-Controlled Cross-Coupling of Di(hetero)aryl Disulfides with Grignard Reagents: CC<i>vs.</i>CS Bond Formation
作者:Bao-Xin Du、Zheng-Jun Quan、Yu-Xia Da、Zhang Zhang、Xi-Cun Wang
DOI:10.1002/adsc.201400980
日期:2015.4.13
A general protocol for the chemoselectivity‐controlled CC and CS coupling reactions of di(hetero)aryldisulfides with Grignardreagents catalyzed by ferrocene and palladium acetate has been developed. Ferrocene favored the formation of CS coupled products at low temperature, whereas CCbond couplings were favored when palladium acetate was used. All the reactions proceeded with excellent chemoselectivity
C-O and C-S coupling reaction of 1,2-di(pyrimidin-2-yl) disulfides with phenols/thiophenols promoted by copper(I) chloride
作者:Ping Zhang、Yan Guo、Zheng-Jun Quan
DOI:10.1002/hc.21397
日期:2017.9
C-O and C-S bonds formation by the cross-coupling reaction of 1,2-di(pyrimidin-2-yl) disulfides with phenols/thiophenols promoted by copper(I) chloride was established. It was discovered that variously substituted di(hetero)aryl disulfides and phenols were well tolerated. This strategy is the conversion of disulfides into hetero-aryl ethers and thioethers by a copper-promoted chemoselectiveC-S bond cleavage
建立了通过氯化铜(I)促进的 1,2-二(嘧啶-2-基)二硫化物与苯酚/苯硫酚的交叉偶联反应形成 CO 和 CS 键的有效方案。发现各种取代的二(杂)芳基二硫化物和酚类具有良好的耐受性。该策略是通过铜促进的二硫化物的化学选择性 CS 键裂解,将二硫化物转化为杂芳基醚和硫醚。