作者:Raghvendra S. Raghuvanshi、Virendra P. Yadav、Vinod K. Singh
DOI:10.2174/1570178612666151028210206
日期:2015.12.2
Background: Benzimidazoles exhibit a wide range of biological activities, including antiparasitic,
antiulcer, antihypertensive, antihistaminic, anticancer, antiemetic and antiinflammatory agents.
Methods: Tetraethylammonium superoxide has been generated in situ by the phase transfer reaction of
potassium superoxide and tetraethylammonium bromide in dry dimethylformamide at room temperature
and subsequently allowed to react with a number of Schiff's bases.
Results: The Synthesis of 2-arylbenzimidazoles from Schiff bases using in situ generated tetraethylammonium superoxide
in dry DMF, at room temperature.
Conclusion: The role of in situ generated Et4NO2 as an efficient agent to promote the synthesis of 2-arylbenzimidazole
from Schiff base has been demonstrated under mild conditions.
背景:苯并咪唑具有广泛的生物活性,包括抗寄生虫药、抗溃疡药、抗高血压药、抗组胺药、抗癌药、止吐药和抗炎药。 方法:在室温下,通过超氧化钾和四乙基溴化铵在干燥的二甲基甲酰胺中发生相转移反应,在原位生成四乙基超氧化铵,然后让其与一些希夫碱发生反应。 结果:合成了 2-芳基溴化铵:在室温下,利用原位生成的四乙基铵超氧化物在干燥的 DMF 中从希夫碱合成 2-芳基苯并咪唑。 结论:在温和的条件下,原位生成的 Et4NO2 作为一种高效制剂,促进了从希夫碱合成 2-芳基苯并咪唑的过程。