The efficient synthesis of Hantzsch 1,4-dihydropyridines via metal-free oxidative C C coupling by HBr and DMSO
作者:Narjes Rezaei、Parviz Rashidi Ranjbar
DOI:10.1016/j.tetlet.2018.10.010
日期:2018.11
synthesis of Hantzsch 1,4-dihydropyridines through metal-free oxidative CC coupling process was described. The reaction between benzylic alcohols, 1,3-dicarbonyl compounds and ammonium hydroxide in the presence of HBr in DMSO at 75 °C led to afford 1,4-dihydropyridine in excellent yields. This protocol introduces the use of benzyl alcohols instead of aldehydes as a new modification of the Hantzsch reaction
描述了一种通过无金属的氧化性C C偶联过程新型高效合成Hantzsch 1,4-二氢吡啶的方法。苄醇,1,3-二羰基化合物与氢氧化铵在HBr存在下于DMSO中于75°C进行反应,从而以极佳的收率得到1,4-二氢吡啶。该协议引入了使用苯甲醇代替醛作为Hantzsch反应的一种新方法。