Domino reaction of cyclic sulfamidate imines with Morita–Baylis–Hillman acetates promoted by DABCO: a metal-free approach to functionalized nicotinic acid derivatives
作者:Debashis Majee、Soumen Biswas、Shaikh M. Mobin、Sampak Samanta
DOI:10.1039/c7ob00240h
日期:——
nitrile or an acetyl group at the C-3 position in good to excellent yields via a domino SN2/elimination/6π-aza-electrocyclization/aromatization reaction of several 4-aryl/hetero-aryl-substituted 5-membered cyclic sulfamidate imines with a broad range of MBH acetates of acrylate/acrylonitrile/MVK in 2-MeTHF promoted by DABCO as an organobase under an O2 atmosphere. Moreover, a biologically interesting triazolopyridine
已开发出一种简便,绿色,无金属的新一锅合成策略,可以轻松获得具有良好收率的,具有良好医学前景的,在C-3位置具有酯,腈或乙酰基基团的医学上有希望的官能化吡啶经由一个多米诺小号ñ 2 /消除的几个4-芳基/杂芳基取代的5元环状磺酰胺酯亚胺与范围广泛的MBH乙酸酯的丙烯酸酯/丙烯腈/ MVK在2- /6π氮杂electrocyclization /芳构化反应DABCO在O 2气氛下将MeTHF用作有机碱。此外,通过独特的方法获得了生物学上令人感兴趣的三唑并吡啶衍生物。