Investigation into the regiochemistry of some isoxazoles derived from 1,3-dipolar cycloaddition of 4-nitrobenzonitrile oxide with some dipolarophiles: A combined theoretical and experimental studies
作者:N. Dorostkar-Ahmadi、M. Bakavoli、F. Moeinpour、A. Davoodnia
DOI:10.1016/j.saa.2011.04.071
日期:2011.9
4-nitrobenzonitrile oxide (2) which was generated in situ with acrylo nitrile (3), methyl methacrylate (4) and allyl bromide (5) as dipolarphile afforded the new 7a, 8a and 9a compounds respectively. Reactivity and regiochemistry of these reactions were investigated using activation energy calculations and density functional theory (DFT)-based reactivity indexes. The theoretical 13C NMR chemical shifts
原位生成的4-硝基苄腈氧化物(2)与丙烯腈(3),甲基丙烯酸甲酯(4)和烯丙基溴(5)作为双极性亲核试剂反应,分别得到新的7a,8a和9a化合物。使用活化能计算和基于密度泛函理论(DFT)的反应指数研究了这些反应的反应性和区域化学。通过GIAO方法获得的环加合物的理论13C NMR化学位移与观察值相当。