A study on the reaction of 3-alkyl(aryl)imidazo[1,5-<i>a</i>]pyridines with ninhydrin
作者:Mervat S. Sammor、Mustafa M. El-Abadelah、Ahmad Q. Hussein、Firas F. Awwadi、Salim S. Sabri、Wolfgang Voelter
DOI:10.1515/znb-2018-0039
日期:2018.6.27
Abstract The reaction of 3-alkyl(aryl)imidazo[1,5-a]pyridines (1) with ninhydrin in dichloromethane at room temperature delivered good yields of the respective 2-hydroxy-2-(imidazo[1,5-a]pyridine-1-yl)indene-1,3-diones. In the presence of dimethyl acetylenedicarboxylate (DMAD), this uncatalyzed electrophilic substitution reaction, involving C-1 (in 1) and the central C=O (in ninhydrin), takes precedence
Iodine-catalyzed direct C–H thiolation of imidazo[1,5-a]quinolines for the synthesis of 3-sulfenylimidazo[1,5-a]quinolines
作者:Song-Song Wu、Cheng-Tao Feng、Di Hu、Ye-Kai Huang、Zhong Li、Zai-Gang Luo、Shi-Tang Ma
DOI:10.1039/c6ob02736a
日期:——
An iodine-catalyzed regioselective sulfenylation of imidazo[1,5-a]quinolines was developed under metal- and oxidant-free reaction conditions. Using disulfides or thiophenols as sulfenylating agents, 3-sulfenylimidazo[1,5-a]quinoline derivatives were obtained in good to excellent yields with broad functional group tolerance. A multi-component reaction to generate 1-sulfenylated imidazo[1,5-a]pyridines
在无金属和无氧化剂的条件下,开发了碘催化的咪唑并[1,5- a ]喹啉的区域选择性亚磺酰基。使用二硫化物或硫酚作为亚磺酰化剂,可以良好的收率获得优异的3-亚磺酰基咪唑并[1,5- a ]喹啉衍生物,并且具有宽泛的官能团耐受性。还描述了产生1-亚磺酰化的咪唑并[1,5- a ]吡啶的多组分反应。初步生物学评估表明,某些3-亚磺酰化的咪唑并[1,5- a ]喹啉具有显着的抗癌活性。
Electrochemical synthesis of selenocyanated imidazo[1,5-a]quinolines under metal catalyst- and chemical oxidant-free conditions
selenocyanation of imidazo[1,5-a]quinolines with KSeCN under metal catalyst- and chemical oxidant-free conditions. This sustainable strategy shows a broad scope and great compatibility with functional groups, and affords synthetically and biologically important selenocyanated imidazo[1,5-a]quinolines in good to excellent yields with cheap graphite and Ni plates as the electrodes. The gram-scale synthesis was also
Natural α-Amino Acids Applied in the Synthesis of Imidazo[1,5-<i>a</i>]N-heterocycles under Mild Conditions
作者:Qiang Wang、Shuai Zhang、Fengfeng Guo、Baiqun Zhang、Ping Hu、Zhiyong Wang
DOI:10.1021/jo302299u
日期:2012.12.21
A facile iodine-mediated decarboxylative cyclization from alpha-amino acids and N-heterocyclic carbaldehydes was developed. By virtue of this method, a series of imidazo[1,5-a]N-heterocycles can be synthesized efficiently under mild conditions. A tentative reaction mechanism was proposed based on the experimental results and previous reports.