NBS mediated protocol for the synthesis of N -bridged fused heterocycles in water
作者:Saket B. Bhagat、Vikas N. Telvekar
DOI:10.1016/j.tetlet.2017.08.017
日期:2017.9
A facile and environmental friendly protocol for the synthesis of N-bridged fused bicyclic compounds such as imidazo[1,2-a]pyridines, imidazo[1,2-a]pyrimidines, and imidazo[2,1-b]thiazole, from commercially available starting materials has been developed. The reaction proceeds via NBS mediated in situ formation of α-brominated intermediate of corresponding aromatic ketones, 1,3-diketones, β-keto esters
从N-桥联稠合双环化合物(如咪唑并[1,2- a ]吡啶,咪唑并[1,2- a ]嘧啶和咪唑并[2,1- b ]噻唑)合成的简便且环境友好的方案已经开发了可商购的原料。反应是通过NBS介导的原位形成相应芳族酮,1,3-二酮,β-酮酯的α-溴化中间体进行的,然后用适当的亲核试剂进行捕集,以提供在金属-金属化条件下高收率的这些通用的咪唑稠合双环杂环化合物。免费条件。