A water-mediated regioselective synthesis of 6,7-diaryl-5-oxo-2,3,5,6-tetrahydroimidazo[1,2-a]pyridine-6-carbonitriles was performed by the reaction of 2-[1-cyano-2,2-bis(methylsulfanyl)vinyl]benzonitrile with 1-aryl-2-(imidazolidin-2-ylidene)ethanones under basic conditions. This reaction involves an unprecedented (4+2) annulation.
The aza-ene reaction of heterocyclic kentene aminals with enones: An unusual and efficient formation of imidazo[1,2-a] pyridine and imidazo[1,2,3-ij][1,8]naphthyridine derivatives
作者:Jian-Heng Zhang、Mei-Xiang Wang、Zhi-Tang Huang
DOI:10.1016/s0040-4039(98)02132-7
日期:1998.12
Reaction of heterocyclic ketene animals with enones proceeds via an aza-ene addition followed by intramolecular cyclization to give imidazo[1,2-a]pyridine and imidazo[1,2,3-ij] [1,8]naphthyridine derivatives.
杂环烯酮动物与烯酮的反应通过氮杂烯加成反应进行,然后进行分子内环化,得到咪唑并[1,2- a ]吡啶和咪唑并[1,2,3- ij ] [1,8]萘啶衍生物。
Substrate-Tuned Domino Annulation for Selective Synthesis of Poly-substituted Benzo[<i>f</i>]imidazo[2,1-<i>a</i>][2,7]naphthyridines and 3-Azaheterocyclic Substituted 2-Arylquinolines
developed for the selective synthesis of poly-substituted benzo[f]imidazo[2,1-a][2,7]naphthyridines and 3-azaheterocyclic substituted 2-arylquinolines. These reactions proceed well under mild conditions without any additives. Plausible mechanisms for such a polycyclic ringsystem assembly were also proposed. Moreover, benzo[f]imidazo[2,1-a][2,7]naphthyridine 3g displayed a fluorescence effect, demonstrating
杂环烯酮缩醛(HKA)和2-氨基查尔酮的多米诺环化/氧化已开发用于选择性合成多取代的苯并[ f ]咪唑并[ 2,1- a ] [2,7]萘啶和3-氮杂环杂环取代基2-芳基喹啉。这些反应在温和条件下进行得很好,没有任何添加剂。还提出了这种多环系统组装的合理机制。此外,苯并[ f ]咪唑并[2,1- a ] [2,7]萘啶3g显示出荧光效应,证明了在有机光学材料中的潜在应用。
Synthesis of Imidazo[1,2-a]pyridines and Pyrido[1,2-a]pyrimidines in Water and their S<sub>N</sub>Ar Cyclizations
作者:Langpoklakpam Gellina Chanu、Thokchom Prasanta Singh、Yong Ju Jang、Yong-Jin Yoon、Okram Mukherjee Singh、Sang-Gyeong Lee
DOI:10.5012/bkcs.2014.35.4.994
日期:2014.4.20
2013Synthesis of tetrahydroimidazo[1,2-a]pyridines and tetrahydropyrido[1,2-a] pyrimidines by a one-pot andthree component reaction of α-oxoketenedithioacetals, diamines and DMAD in water has been described.Different routes for accessing the desired compounds were examined and a few specially designed-substrateshave been utilized further to afford the new imidazo and pyrido fused [1,8] naphthyridine
E-mail: leesang@gnu.ac.kr 2013年9月4日接收,2013年10月11日接受已经描述了水中的α-氧代烯二硫代缩醛、二胺和 DMAD。研究了获得所需化合物的不同途径,并进一步利用了一些专门设计的底物,通过 S
The reaction of heteroaroyl-substituted heterocyclic ketene aminals with 2,3,4,6-tetra-O-acetyl-?-D-glucopyranosyl azide
The reaction of heteroaroyl-substitutedheterocyclicketeneaminals with 2,3,4,6-tetra-O-acetyl-β-D-glucopyranosyl azide was investigated and a series of potential bioactive compounds, 1-glucopyranosyl-4-heterocyclic-5-heteroaryl-1,2,3-triazoles, were obtained in good yields. Both the reaction rate and the yield were strongly affected by the heteroaryl and heterocyclic groups. In order to improve their