作者:Teruo Yamamori、Yoshiharu Hiramatu、Katunori Sakai、Ikuo Adachi
DOI:10.1016/s0040-4020(01)96409-9
日期:1985.1
Reactions of 5-aminoisoxazoles with α,β-unsaturated ketones in t-butanol on heating afforded 4,7-dihydroisoxazolo [5,4-b]pyridines. However, when the reactions were carried out at 20° using ethylene glycol as the solvent, the kinetically controlled amino adducts were obtained in excellent yields. The amino adducts were converted into the thermodynamically controlled 4,7-dihydroisoxazolo[5,4-b]pyridines
5-氨基异恶唑与叔丁醇中的α,β-不饱和酮加热反应,得到4,7-二氢异恶唑并[5,4-b]吡啶。然而,当使用乙二醇作为溶剂在20°下进行反应时,以优异的产率获得了动力学控制的氨基加合物。通过加热将氨基加合物转化为热力学控制的4,7-二氢异恶唑并[5,4-b]吡啶。还提出了反应的暂定机理。