已经开发了一种方便的一锅三组分反应,用于使用二甲基亚砜作为亚甲基供体,从芳基酮和2-氨基-N-杂环合成3-芳基咪唑并[1,2- a ] -N-杂环。在K 2 S 2 O 8的存在下,反应被I 2平稳催化,并以中等至良好的产率提供所需的产物。该协议在访问具有各种取代方式的生物活性3-芳基咪唑并[1,2- a ] -N-杂环时具有显着优势。
Convenient two-step one-pot synthesis of 3-substituted imidazo[1,2-a]pyridines and imidazo[1,2-b]pyridazines
作者:Hongli Fan、Fenghai Li
DOI:10.1007/s12039-018-1462-z
日期:2018.5
This protocol provides a simple and practical approach to 3-substituted fused imidazo-heterocyclic compounds in moderate to high yields. Graphical Abstract Synopsis. 3-Substituted imidazo[1,2-a]pyridines and imidazo[1,2-b]pyridazines were synthesized through a convenient, novel two-step one-pot reaction of heterocyclic amines and N,N-dimethylformamide dimethyl acetate with active electrophiles in moderate
摘要通过杂环胺与N的反应,开发了一种简便,新颖的两步法一锅法合成3-取代的咪唑并[1,2- a ]吡啶和3-取代的咪唑并[1,2- b ]哒嗪, 具有活性亲电子试剂的N-二甲基甲酰胺乙酸二甲酯\(\ hbox RCH} _ 2} \ hbox Br} \)(\(\ hbox R} = \ hbox CO} _ 2} \ hbox Et} \),CN,COPh,4'-MeO-PhCO和4'-F-PhCO)。该协议为中度至高收率的3-取代稠合咪唑杂环化合物提供了一种简单实用的方法。 图形概要 概要。通过杂环胺与N,N-二甲基甲酰胺乙酸二甲酯与活性亲电试剂的便捷,新颖的两步一锅反应,合成了3-取代的咪唑并[1,2- a ]吡啶和咪唑并[1,2- b ]哒嗪中等至高产。
Transition Metal-Mediated C═O and C═C Bond-Forming Reactions: A Regioselective Strategy for the Synthesis of Imidazo[1,2-<i>a</i>]pyridines and Imidazo[1,2-<i>a</i>]pyrazines
A novel and convenient transformation for the regiospecific synthesis of functionalizedimidazo[1,2-a]pyridine aldehydes/ketones and 3-vinyl imidazo[1,2-a]pyridines has been developed via copper(I)- and palladium(II)-catalyzed cyclization. The one-pot reaction proceeds smoothly with commercially available catalysts and affords the products in moderate to good yields. It represents an efficient approach
Iron(III)-catalyzed synthesis of 3-aroylimidazo[1,2-a]pyridines from 2-aminopyridines and ynals
作者:Zhengwang Chen、Botao Liu、Pei Liang、Zhixiong Yang、Min Ye
DOI:10.1016/j.tetlet.2018.01.018
日期:2018.2
An efficient iron-catalyzed intermolecular aminooxygenation of 2-aminopyridines with a wide range of ynals has been developed. 3-Aroylimidazo[1,2-a]pyridines containing various functional groups are synthesized under the standard conditions. The transformation is conducted in simple conditions and forms products in good yields.
已经开发了具有广泛的烯醛的2-氨基吡啶的有效铁催化的分子间氨基氧化。在标准条件下合成含有各种官能团的3-芳基咪唑并[1,2- a ]吡啶。该转化在简单的条件下进行,并以高收率形成产物。
I<sub>2</sub>-catalyzed intramolecular oxidative amination of C(sp<sup>3</sup>)–H bond: efficient access to 3-acylimidazo[1,2-<i>a</i>]pyridines under neat condition
作者:Lilan Huang、Wenqing Yin、Jian Wang、Chunfang Gan、Yanmin Huang、Chusheng Huang、Yimiao He
DOI:10.1039/c8ra10118c
日期:——
An efficient and “green” protocol for the synthesis of 3-acylimidazo[1,2-a]pyridines through intramolecular oxidative α-amination of carbonyl compounds has been developed. The reaction proceeds smoothly utilizing I2 as a catalyst and H2O2 as an oxidant under neat condition with broad substrate scope. Several complex nitrogen-containing fused rings are conveniently constructed, which are not easy to
已经开发了一种通过羰基化合物的分子内氧化 α-胺化合成 3-酰基咪唑并[1,2- a ]吡啶的有效且“绿色”的方案。以I 2为催化剂,H 2 O 2为氧化剂,反应在纯净条件下顺利进行,底物范围广。几个复杂的含氮稠环结构方便,传统方法不易获得。
I<sub>2</sub>-Catalyzed Three-Component Consecutive Reaction for the Synthesis of 3-Aroylimidazo[1,2-<i>a</i>]-<i>N</i>-Heterocycles
作者:Yi Zhang、Rener Chen、Zhiming Wang、Lei Wang、Yongmin Ma
DOI:10.1021/acs.joc.1c00023
日期:2021.5.7
A convenient one-pot, three-component reaction has been developed for the synthesis of 3-aroylimidazo[1,2-a]-N-heterocycles from aryl ketones and 2-amino-N-heterocycles using dimethyl sulfoxide as a methylene donor. The reaction proceeds smoothly catalyzed by I2 in the presence of K2S2O8 and affords the desired products in moderate to good yields. This protocol offers significant superiority in accessing
已经开发了一种方便的一锅三组分反应,用于使用二甲基亚砜作为亚甲基供体,从芳基酮和2-氨基-N-杂环合成3-芳基咪唑并[1,2- a ] -N-杂环。在K 2 S 2 O 8的存在下,反应被I 2平稳催化,并以中等至良好的产率提供所需的产物。该协议在访问具有各种取代方式的生物活性3-芳基咪唑并[1,2- a ] -N-杂环时具有显着优势。