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
A mild and rapid procedure to the synthesis of 2-substituted pyrimidines was developed via sequential functionalization of easily available Biginelli 3,4-dihydropyrimidine-2(1H)-ones via oxidation, esterification, followed by cross-couplingreaction of pyrimidin-2-yl sulfonates with N, S, and O nucleophiles in PEG-400 as a green reaction medium at room temperature.
通过氧化、酯化以及嘧啶-2-的交叉偶联反应对容易获得的 Biginelli 3,4-二氢嘧啶-2(1H)-酮进行顺序功能化,开发了一种温和且快速的合成 2-取代嘧啶的方法在室温下作为绿色反应介质,在 PEG-400 中使用 N、S 和 O 亲核试剂制备基磺酸盐。
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。
Synthesis of C2‐Functionalized Pyrimidine Derivatives by Using Arynes and Dithiopyrimidines
作者:Chun‐Hong Yang、Wen‐Peng Wang、Ming Li、Fan Gao、Wen Ma、Dong‐Ping Chen、Xi‐Cun Wang、Zheng‐Jun Quan
DOI:10.1002/ejoc.202300435
日期:2023.8
A method for synthesizing C2 functionalized pyrimidine derivatives by phenylalkyne and pyrimidine disulfide under environmental conditions with good group compatibility is reported. Furthermore, density functional theory (DFT) calculations confirm that it is more advantageous to generate C2-functionalized pyrimidine derivatives.