NucleophilicOrthoAllylation of Aryl and Heteroaryl Sulfoxides
摘要:
Aryl and heteroaryl sulf oxides undergo ortho allylation upon treatment with Tf2O and allyisilanes. The method complements the use of sulfoxides to direct ortho-metalation and reaction with electrophiles as it allows allylic carbon nucleophiles to be added ortho to the directing group in a metal-free process. The versatile sulfide adducts can be selectively manipulated using various methods Including Kumada-Corriu cross-coupling of the organosulfanyl group.
Chan–Lam-Type C–S Coupling Reaction by Sodium Aryl Sulfinates and Organoboron Compounds
作者:Long Yin Lam、Cong Ma
DOI:10.1021/acs.orglett.1c02299
日期:2021.8.6
A Chan–Lam-type C–S coupling reaction using sodium aryl sulfinates has been developed to provide diaryl thioethers in up to 92% yields in the presence of a copper catalyst and potassium sulfite. Both electron-rich and electron-poor sodium aryl sulfinates and diverse organoboron compounds were tolerated for the synthesis of aryl and heteroaryl thioethers and dithioethers. The mechanistic study suggested
A Highly Efficient, Ligand-Free, and Recyclable Cu2S-Catalyzed Coupling of Aryl Iodides with Diaryl Disulfides
作者:Huifeng Wang、Linlin Jiang、Tao Chen、Yaming Li
DOI:10.1002/ejoc.201000003
日期:2010.4
A highlyefficient and ligand-free copper(I) sulfide catalyzed cross-coupling reaction of aryliodides with diaryldisulfides was developed. With only 1 mol-% of Cu 2 S as the catalyst, iron powder as the reductant, and K 2 CO 3 as the base, aryliodides reacted with disulfides in DMSO at 90-110°C for 18-24 h under an atmosphere of argon to give the corresponding aryl sulfides in good to excellent
开发了一种高效且无配体的硫化铜(I)催化芳基碘化物与二芳基二硫化物的交叉偶联反应。以1 mol%的Cu 2 S为催化剂,铁粉为还原剂,K 2 CO 3 为碱,芳基碘化物与二硫化物在DMSO中在90-110°C的气氛下反应18-24 h氩以良好至极好的产率得到相应的芳基硫化物。此外,催化剂是可回收和可重复使用的,但会损失一些活性。
Iron-mediated oxidative C–H coupling of arenes and alkenes directed by sulfur: an expedient route to dihydrobenzofurans
作者:Craig W. Cavanagh、Miles H. Aukland、Quentin Laurent、Alan Hennessy、David J. Procter
DOI:10.1039/c6ob00883f
日期:——
ortho-coupling of arenes and unactivated terminal alkenes mediated by iron, and a palladium-catalysed deallylation/heterocyclisation sequence. The iron-mediated coupling affords linear products of alkene chloroarylation in good yield and with complete regioselectivity. The coupling likely proceeds by redox-activation of the arene partner by iron(III) and alkene addition to the resultant radicalcation.