imidazo[1,2-a]pyridines using p-tosylchloride as a benign source of sulfenylating agents has been developed. On the other hand, p-tosylchloride mediated thiomethylation of imidazo[1,2-a]pyridines with dimethylsulfoxide as a source of thiomethylation under metal-free conditions was also described.
已经开发了使用对甲苯磺酰氯作为亚磺化剂的良性来源的咪唑并[1,2- a ]吡啶的铜催化的区域选择性C-3亚磺酰基化。另一方面,还描述了在无金属条件下,对甲苯磺酰氯介导的咪唑并[1,2- a ]吡啶的硫甲基化,其中使用二甲基亚砜作为硫甲基化的来源。
Synergistic cooperative effect of CF<sub>3</sub>SO<sub>2</sub>Na and bis(2-butoxyethyl)ether towards selective oxygenation of sulfides with molecular oxygen under visible-light irradiation
作者:Kai-Jian Liu、Zheng Wang、Ling-Hui Lu、Jin-Yang Chen、Fei Zeng、Ying-Wu Lin、Zhong Cao、Xianyong Yu、Wei-Min He
DOI:10.1039/d0gc02663h
日期:——
visible-light-initiated oxygenation of sulfides at ambient temperature under transition-metal-, additives-free and minimal solvent conditions. The synergistic catalytic efforts between CF3SO2Na and 2-butoxyethyl ether represents the key promoting factor for the reaction.
一种安全,实用,环保的方法,可在环境温度下,无过渡金属,无添加剂且溶剂最少的条件下,通过可见光引发的硫化物氧合转换合成亚砜和砜。CF 3 SO 2 Na和2-丁氧基乙基醚之间的协同催化作用是反应的关键促进因素。
Iron(III)-Catalyzed Denitration Reaction: One-Pot Three-Component Synthesis of Imidazo[1,2-<i>a</i>]pyridine Derivatives
An iron(III)-catalyzed one-potthree-component cross-coupling nitration reaction of 2-aminopyridines, aldehydes and nitroalkanes, straightforwardly forms imidazo[1,2-a]pyridinederivatives and is described in this report. The system shows good functional-group tolerance and proceeds smoothly in moderate to good yields.
The first transition‐metal‐free method for direct C−H trifluoromethylation of imidazo[1,2‐a]pyridine derivatives with readily available Ruppert‐Prakash reagent TMSCF3 undermildconditions was described. Moreover, this method could be applied to direct C−H perfluoroalkylation of imidazopyridines, affording a series of novel perfluoroalkylated products in moderate to good yields. Notable advantages
Electrochemically initiated intermolecular C–N formation/cyclization of ketones with 2-aminopyridines: an efficient method for the synthesis of imidazo[1,2-<i>a</i>]pyridines
Electrochemical intermolecular C–N formation/cyclization of ketones with 2-aminopyridines using catalytic hydriodic acid as the redox mediator was developed, providing imidazo[1,2-a]pyridines under more environmentally benign conditions. The reaction proceeds in a simple undivided cell, using low toxic ethanol as the solvent, without external oxidants, and exhibits high atom economy. A variety of ketones
开发了使用催化氢碘酸作为氧化还原介体的2-氨基吡啶与酮的电化学分子间C–N形成/环化反应,在更环境友好的条件下提供了咪唑并[1,2- a ]吡啶。该反应在一个简单的,没有分裂的细胞中进行,使用低毒的乙醇作为溶剂,没有外部氧化剂,并且具有很高的原子经济性。该反应适合各种酮,包括苯乙酮,未取代的和烷基酮,以中等至极好的收率提供相应的产物。在标准条件下,也可以实现三组分串联反应,实现C–N,C–S / C–Se键的形成。