The arylation of imidazo[1,2‐a]pyridine and benzo[d]imidazo[2,1‐b]thiazoles by using diaryliodonium salts has been developed. Potassium tert‐butoxide was used to promote this transition‐metal‐free reaction, which afforded the corresponding products in good to excellent yields.
咪唑的芳基化[1,2一]吡啶和苯并[ d ]咪唑并[2,1- b ]通过使用二芳基碘盐已经开发噻唑。钾叔丁醇是用来促进此过渡金属无反应,得到相应的产品以良好至优异的产量。
C3 Sulfenylation of N-Heteroarenes in Water under Catalyst-Free Conditions
We describe herein a catalyst-free selective C−H sulfenylation of imidazo[1,2-a]pyridines using sulfonothioates as odorless source of thioarylated reagent in an aqueous medium. The method works for a variety of substitutedimidazo[1,2-a]pyridines with broad functional group tolerance. The methodology has been extends to selective sulfernylation of indoles and imidazothiazoles. The sulfonothioates are
Use of Imidazo[1,2‐
<i>a</i>
]pyridine as a Carbonyl Surrogate in a Mannich‐Like, Catalyst Free, One‐Pot Reaction
作者:Gunaganti Naresh、Naga Rajiv Lakkaniga、Anupreet Kharbanda、Wei Yan、Brendan Frett、Hong‐yu Li
DOI:10.1002/ejoc.201801430
日期:2019.1.31
developed a simple and efficient protocol to aminomethylate the C‐3 position of imidazo[1,2‐a]pyridine through a multicomponent, decarboxylation reaction involving imidazo[1,2‐a]pyridine, a secondary amine, and glyoxylic acid. The developed protocol requires mild reaction conditions and furnishes diverse imidazo[1,2‐a]pyridine analogues from commercially available starting materials.
我们开发了一种简单而有效的协议来aminomethylate咪唑并[1,2的C-3位一个通过多组分]吡啶,脱羧反应涉及咪唑并[1,2一]吡啶,仲胺,和二羟乙酸。制定的方案要求反应条件温和,并从市售起始原料中提供多种咪唑并[1,2- a ]吡啶类似物。
Catalyst free, C-3 functionalization of imidazo[1,2-<i>a</i>]pyridines to rapidly access new chemical space for drug discovery efforts
Multicomponentreactions (MCRs) are robust tools for the rapid synthesis of complex, small molecule libraries for use in drug discovery and development. By utilizing MCR chemistry, we developed a protocol to functionalize the C-3 position of imidazo[1,2-a]pyridine through a three component, decarboxylation reaction involving imidazo[1,2-a]pyridine, glyoxalic acid, and boronic acid.
An electrochemical oxidative homo-coupling reaction of imidazopyridine heterocycles to biheteroaryls
作者:Yongyuan Gao、Yang Wang、Jie Zhou、Haibo Mei、Jianlin Han
DOI:10.1039/c7gc03563b
日期:——
An electrochemical dehydrogenative homo-coupling reaction of imidazopyridine-based heterocycles has been developed, which affords biheteroaryls with good chemical yields and high regioselectivities. This reaction is conducted in a simple undivided cell at room temperature, which avoids the use of any metal-catalysts, additives and oxidants. This reaction tolerates a wide scope of substrates, which