无金属的C–N键形成:一锅合成吡啶并[2',1':2,3]咪唑并[4,5- c ] cinnolines,苯并[4',5']噻唑并-噻唑并[2] ′,3':2,3]咪唑并[4,5- c ] cinnolines †
摘要:
一种高效的一锅合成新型吡啶并[2',1':2,3]咪唑并[4,5- c ] cinnoline衍生物已实现,具有中等至良好的产率,并通过CH形成了两个C–N键2-芳基咪唑并[1,2- a ]吡啶的官能化。反应通过偶氮二异丙基二异丙基酯的C-3区域选择性酰化进行,然后通过C–H官能化在三氟乙酸中由苯基碘(III)二乙酸酯(PIDA)介导的氧化N-芳基化反应生成吡啶基[2',1':2, 3]咪唑并[4,5- c ] cinnolines。其他imidazoheterocycles如2-芳基苯并[ d ]咪唑并[2,1- b ]噻唑和6-芳基咪唑并[2,1- b对噻唑在无过渡金属和温和条件下进行相似的转化,得到相应的辛啉。
The invention relates to compounds of formula (I): and their pharmaceutically acceptable salts and solvates, which are inhibitors of SSAO activity. The invention further relates to pharmaceutical compositions comprising these compounds and to the use of these compounds for the treatment or prevention of medical conditions wherein inhibition of SSAO activity is beneficial, such as inflammatory diseases and immune disorders.
The invention relates to compounds of formula (I): and their pharmaceutically acceptable salts and solvates, which are inhibitors of SSAO activity. The invention further relates to pharmaceutical compositions comprising these compounds and to the use of these compounds for the treatment or prevention of medical conditions wherein inhibition of SSAO activity is beneficial, such as inflammatory diseases and immune disorders.
The invention relates to compounds of formula (I): and their pharmaceutically acceptable salts and solvates, which are inhibitors of SSAO activity. The invention further relates to pharmaceutical compositions comprising these compounds and to the use of these compounds for the treatment or prevention of medical conditions wherein inhibition of SSAO activity is beneficial, such as inflammatory diseases and immune disorders.
Novel one step synthesis of imidazo[1,2-a]pyridines and Zolimidine via iron/iodine-catalyzed Ortoleva-King type protocol
作者:Sankuviruthiyil Mohanan Ujwaldev、K.R. Rohit、Nissy Ann Harry、Gopinathan Anilkumar
DOI:10.1016/j.tetlet.2019.150950
日期:2019.8
Imidazo[1,2-a]pyridines form versatile scaffolds in pharmaceutical industry arising from their diverse biological activities. The synthesis of these molecules thus has been of great interest and resulted in the development of a large number of new methodologies. Herein we describe the first iron-catalyzed Ortoleva-King type protocol towards the synthesis of these fused heterocycliccompounds. This
咪唑并[1,2- a ]吡啶因其多种生物活性而在制药工业中形成多功能支架。因此,这些分子的合成引起了极大的兴趣,并导致了许多新方法的发展。在这里,我们描述了第一个铁催化的Ortoleva-King型协议,以合成这些稠合的杂环化合物。该方法采用廉价且容易获得的FeCl 3 ·6H 2 O和分子碘作为催化体系。该过程已被基板范围与各种芳族酮和2-氨基吡啶,得到不同的咪唑并延伸[1,2被很好探索一个吡啶衍生物的产率中等至良好。该方案的成功应用还通过直接一步合成胃保护药物Zolimidine得到了证明。
Metal-free C–N bond formations: one-pot synthesis of pyrido[2′,1′:2,3]imidazo[4,5-c]cinnolines, benzo[4′,5']thiazolo- and thiazolo[2′,3′:2,3]imidazo[4,5-c]cinnolines
An efficient one-pot synthesis of novel pyrido[2′,1′:2,3]imidazo[4,5-c]cinnoline derivatives has been achieved with moderate to good yields, with two C–N bond formations through C–H functionalization of 2-arylimidazo[1,2-a]pyridines. The reaction proceeds via C-3 regioselective hydrazination with diisopropyl azodicarboxylate followed by oxidative N-arylation mediated by phenyliodine(III) diacetate
一种高效的一锅合成新型吡啶并[2',1':2,3]咪唑并[4,5- c ] cinnoline衍生物已实现,具有中等至良好的产率,并通过CH形成了两个C–N键2-芳基咪唑并[1,2- a ]吡啶的官能化。反应通过偶氮二异丙基二异丙基酯的C-3区域选择性酰化进行,然后通过C–H官能化在三氟乙酸中由苯基碘(III)二乙酸酯(PIDA)介导的氧化N-芳基化反应生成吡啶基[2',1':2, 3]咪唑并[4,5- c ] cinnolines。其他imidazoheterocycles如2-芳基苯并[ d ]咪唑并[2,1- b ]噻唑和6-芳基咪唑并[2,1- b对噻唑在无过渡金属和温和条件下进行相似的转化,得到相应的辛啉。