四环骨架的咪唑并[1,2结合一个]吡啶部分具有喹啉骨架,如吡啶并[2',1':2,3]咪唑并[4,5- b ]喹啉的刺激增加利益,因为它们是靠近电子等排物一系列强大的抗增殖化合物。在本文中,我们报告了一种通过市售或易于获得的2-氨基吡啶的一锅顺序反应合成吡啶并[2',1':2,3]咪唑并[4,5- c ]喹啉的新颖方法, 2-溴代苯甲基溴化物,氨水和醛。此外,二氢吡啶并[2',1':2,3]咪唑[4,5‐ c通过使用各种酮代替醛作为底物,也可以类似的方式获得]喹啉。值得注意的是,整个过程在一个罐中结合了缩合/胺化/环化反应,从而以一种简单而实用的方式得到了复杂的化合物。与文献方法相比,本文报道的合成策略具有以下优势:容易获得的起始原料,产物的结构多样性,良好的官能团耐受性和避免逐步操作的优点。
selective product formation and high yields are the advantages of this method. The synthesis of a series of novel quinoline fused imidazo[4,5-c]quinolines was accomplished by a simple, efficient, iodine–dimethyl sulfoxide (I2–DMSO) promoted sequential oxidative cross coupling followed by intramolecular cyclization of pyridoimidazole arylamines and carbonyl compounds in a one-pot reaction. Simple reaction
摘要 一系列新颖的喹啉稠合的咪唑并[4,5- c ]喹啉的合成是通过简单,有效的碘-二甲基亚砜(I 2 -DMSO)促进的顺序氧化交叉偶联,然后进行吡啶并咪唑芳胺和羰基的分子内环化一锅反应中的化合物。简单的反应条件,无金属催化剂,无添加剂,无配体,选择性的产物形成和高收率是该方法的优点。 一系列新颖的喹啉稠合的咪唑并[4,5- c ]喹啉的合成是通过简单,有效的碘-二甲基亚砜(I 2 -DMSO)促进的顺序氧化交叉偶联,然后进行吡啶并咪唑芳胺和羰基的分子内环化一锅反应中的化合物。简单的反应条件,无金属催化剂,无添加剂,无配体,选择性的产物形成和高收率是该方法的优点。
Synthesis of biologically active pyridoimidazole/imidazobenzothiazole annulated polyheterocycles using cyanuric chloride in water
作者:Anand Kumar Pandey、Rashmi Sharma、Awantika Singh、Sanjeev Shukla、Kumkum Srivastava、Sunil K. Puri、Brijesh Kumar、Prem M. S. Chauhan
DOI:10.1039/c4ra03415e
日期:——
An efficient and mild protocol for rapid access to N-fused polyheterocycles via Pictet–Spengler type 6-endo cyclization by cyanuric chloride in aqueous medium has been developed.
Molecular iodine-catalysed oxidative CO–C(alkyl) bond cleavage of aryl/heteroaryl alkyl ketones: an efficient strategy to access fused polyheterocycles
作者:Geeta Sai Mani、Ayanampudi Venkata Subba Rao、Yellaiah Tangella、Satish Sunkari、Faria Sultana、Hari Krishna Namballa、Nagula Shankaraiah、Ahmed Kamal
DOI:10.1039/c8nj03417f
日期:——
An efficient molecular iodine-catalysed one-pot strategy has been accomplished for the construction of various fused heterocycles such as pyridoimidazoles, pyrrolo[1,2-a]quinoxalines and imidazobenzothiazoles under metal and oxidant free conditions. Gratifyingly, this method allows the sequential formation of C–N and C–C bonds with concomitant CO–C(alkyl) bond cleavage. The key features of this protocol
在无金属和无氧化剂条件下,已经完成了一种有效的分子碘催化一锅策略,用于构建各种稠合杂环,如吡啶并咪唑,吡咯并[1,2- a ]喹喔啉和咪唑并苯并噻唑。令人欣慰的是,这种方法可以依次形成C–N和C–C键,并伴随有CO–C(烷基)键断裂。该协议的关键特征是广泛的底物范围,操作简便,良率适中和无金属条件,这使该协议便于生成稠合多杂环文库。
Iodine promoted synthesis of pyrido[2′,1′:2,3]imidazo[4,5-c]quinoline derivatives via oxidative decarboxylation of phenylacetic acid
unprecedented and efficient molecular iodine promoted domino protocol for the synthesis of N polycyclic pyrido[2′,1′:2,3]imidazo[4,5-c]quinolines were reported from phenylacetic acid and 2-(imidazoheteroaryl)anilines. This methodology was also extended for the preparation of benzo[4′,5′]thiazolo [2′,3′:2,3]imidazo[4,5-c]isoquinolines in good yields. However, this protocol proceeds via a sequential
摘要 报道了从苯乙酸和 2-(咪唑杂芳基)苯胺合成N多环吡啶并[2',1':2,3] 咪唑并[4,5-c]喹啉的前所未有的高效分子碘促进多米诺协议。该方法还被扩展用于以良好收率制备苯并[4',5']噻唑并[2',3':2,3]咪唑并[4,5- c ]异喹啉。然而,该协议通过苯乙酸与 I 2 /DMSO 系统的顺序脱羧进行,然后以良好的收率进行 Pictet-Spengler 环化。
Molybdenum‐Catalyzed One‐Pot Multi‐Step Synthesis of N‐Polyheterocycles from Nitroarenes and Glycols
作者:Sara Gómez‐Gil、Nuria Cases、Raquel Hernández‐Ruiz、Rubén Rubio‐Presa、Samuel Suárez‐Pantiga、María R. Pedrosa、Roberto Sanz
DOI:10.1002/ejoc.202400145
日期:2024.5.13
A tandem process for the synthesis of N-polyheterocycles from easily available nitroarenes catalyzed by a dioxomolybdenum(VI) complex is described, where the byproduct generated in the first step is incorporated into the final structure. A broad variety of nitrogenated compounds are synthesized in overall good yields in a one-pot manner.