萘的合成[1',2':4,5]咪唑并[1,2一]吡啶和咪唑并[5,1,2- CD ]中氮茚通过2-苯基咪唑的Pd催化Cycloaromatization [1,2一吡啶与炔烃
摘要:
本文研究了内部炔烃对钯催化的2-苯基咪唑并[1,2- a ]吡啶(PIP)的氧化环芳构化反应。从该反应中,可以得到两类稠合的N-杂环,萘并[1',2':4,5]咪唑并[1,2- a ]吡啶(NIP)和咪唑并[5,1,2- cd ]吲哚并嗪(IID )是通过脱氢偶联形成的,其特征是位于PIP底物不同部分的C–H键断裂。此外,当5-甲基-2-苯基咪唑并[1,2- a ]吡啶或2-杂咪唑并[1,2 - a使用]吡啶,可以高效获得独家产品NIP或IID。有趣的是,与Rh(III)相比,Pd(II)在促进该反应方面表现出不同的作用方式,并导致NIP的形成,其对不对称炔烃的反应具有区域选择性相反的结果。
Copper-Catalyzed Synthesis of Imidazo[1,2-<i>a</i>]pyridines through Tandem Imine Formation-Oxidative Cyclization under Ambient Air: One-Step Synthesis of Zolimidine on a Gram-Scale
A new copper‐catalyzed oxidative cyclization via CH amination between 2‐aminopyridines and methyl aryl/heteroaryl ketones has been developed under ambient air. Imidazo[1,2‐a]pyridines containing a wide range of functional groups have been synthesized from basic and easily available starting materials. This simple, one‐pot reaction protocol is applicable for the direct preparation of zolimidine (a
一种新的铜催化的氧化环化经由Ç ħ胺化2-氨基吡啶和间甲基芳基/杂芳基酮已根据环境空气显影。含有多种官能团的咪唑并[1,2- a ]吡啶是从碱性且容易获得的起始原料合成的。这种简单的一锅法反应方案适用于大规模直接制备唑来咪定(市售的抗溃疡药)。
Iron(III)-catalyzed three-component domino strategy for the synthesis of imidazo[1,2-a]pyridines
An efficient, one-pot, three-component domino strategy has been demonstrated for the synthesis of imidazo[1,2-a]pyridines using a catalytic amount of Fe(III) chloride in high yields in air. A library of imidazo[1,2-a]pyridines was synthesized by the reaction of easily available aldehydes and 2-aminopyridines in a mixture of nitroalkane and DMF (2:1). This transformation presumably occurs by a sequential
已经证明了一种有效的单锅三组分多米诺骨牌策略,该策略用于在空气中高产率地使用催化量的氯化Fe(III)合成咪唑并[1,2- a ]吡啶。通过使易得的醛与2-氨基吡啶在硝基烷和DMF(2:1)的混合物中反应,合成了咪唑并[1,2- a ]吡啶文库。该转化大概是通过顺序的氮杂-亨利反应/环化/脱硝而发生的。使用容易获得的化学品作为起始原料,廉价的金属催化剂,好氧反应条件,宽泛的官能团耐受性和操作简便性是本方案的显着优势。
A Facile and Efficient Synthesis of bis(Imidazo[1,2-a]pyridin-3-yl)methane
and Vinyl Derivatives
作者:Daliparthi Eswara Prasada Rao、Medepalli David Raju、Jasti Surendra、Ala Vasu Babu、Poguri Eswaraiah、Nallamaddi Ravi Kumar Reddy、Chinnapillai Rajendiran、Mandava Venkata Basaveswara Rao
DOI:10.2174/1570178618666211022144225
日期:2022.1
derivatives by the reaction between two moles of imidazo[1,2-a]pyridine, one mole ofchloroacetaldehyde in acetic acid, and two drops of trifluoroacetic acid was not successful, insteadunderwent dehydrohalogenation to yield vinyl derivatives (4a-d).
Iron(III)-Catalyzed Cascade Reaction between Nitroolefins and 2-Aminopyridines: Synthesis of Imidazo[1,2-<i>a</i>]pyridines and Easy Access towards Zolimidine
The iron(III)‐catalyzed one‐pot cascadereactionbetweennitroolefins and 2‐aminopyridines has been demonstrated for the synthesis of imidazo[1,2‐a]pyridines by exploiting the bielectrophilic nature of nitroolefins. This methodology could be successfully applicable for the synthesis of zolimidine, a useful drug for the treatment of peptic ulcer. The reaction proceeds through Michael addition followed
通过利用硝基烯烃的双亲电子性质,已证明了铁(III)催化的硝基烯烃与2-氨基吡啶之间的一锅级联反应可用于合成咪唑并[1,2- a ]吡啶。该方法学可以成功地用于合成唑来咪定,这是一种治疗消化性溃疡的有用药物。反应通过迈克尔加成进行,随后进行分子内环化和原位脱硝。
Application of Imidazopyridine Derivatives in Regenerative Medicine
申请人:University of Heidelberg
公开号:US20200062719A1
公开(公告)日:2020-02-27
A method of producing a pluripotent stem cell is provided. The method is comprising contacting a non-pluripotent donor cell obtained from a mammalian donor with a compound characterized by general formulas (1) and (3). Furthermore, methods for inducing OCT4 and NANOG, increasing histone 3 lysine methylation and the maintenance of pluripotency are provided.