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。
Electrochemically enabled synthesis of sulfide imidazopyridines <i>via</i> a radical cyclization cascade
作者:Ping-Fu Zhong、Hong-Min Lin、Lin-Wei Wang、Zu-Yu Mo、Xiu-Jin Meng、Hai-Tao Tang、Ying-Ming Pan
DOI:10.1039/d0gc02125c
日期:——
Owing to the inert nature of the pyridine ring and high activity of iminyl radicals, the reaction between pyridine and iminyl radicals remains a significant challenge. In this paper, we report the synthesis of sulfide imidazo[1,2-a]pyridines from vinyl azides, thiophenols, and pyridines via a radical [3 + 2] cycloaddition. Promoting inert pyridine and highly active iminyl radicals to participate in
由于吡啶环的惰性和亚氨基自由基的高活性,吡啶和亚氨基自由基之间的反应仍然是一个重大挑战。在本文中,我们报告了通过自由基[3 + 2]环加成反应从乙烯基叠氮化物,硫酚和吡啶合成硫化物咪唑并[1,2- a ]吡啶。促进惰性吡啶和高活性亚氨基自由基参与该分子间环加成过程是该方案的显着特征。所制备的硫化物咪唑并吡啶支架的优异抗肿瘤活性证明了开发的合成方案的合成实用性。
Graphene oxide (GO)-catalyzed multi-component reactions: green synthesis of library of pharmacophore 3-sulfenylimidazo[1,2-a]pyridines
作者:Samir Kundu、Basudeb Basu
DOI:10.1039/c5ra04983k
日期:——
Graphene oxide (GO)-catalyzed multi-component reactions: green synthesis of library of pharmacophore 3-sulfenylimidazo[1,2-a]pyridines
Iodine-Mediated Multicomponent Synthesis of 3-Sulfenylimidazo[1,2-a]pyridines from 2-Aminopyridines, Ketones, and Sulfonyl Hydrazides
作者:Hongjun Ren、Zhengkai Chen、Sipei Hu、Shiying Du、Yunjie Yao、Zuguang Yang
DOI:10.1055/s-0037-1612082
日期:2019.3
A one-pot multicomponent reaction for the synthesis of 3-sulfenylimidazo[1,2-a]pyridines from readily available 2-aminopyridines, ketones, and sulfonyl hydrazides, mediated by molecular iodine, has been developed. The transformations proceed smoothly with high efficiency and a broad substrate scope, affording the desired heterocyclic products in moderate to excellent yields.
A one-pot three-component reaction for the regioselective synthesis of thioarylated imidazoheterocycles from aryl halides and elemental sulfur using copper(I) iodide as a catalyst has been developed. Reactions proceed with high efficiency and afford thioarylated imidazoheterocycles in good yields with broad functional group tolerance.