The reactions of alkyl 3-bromo-3-nitroacrylates with N,N-, N,O-, and О,О-o-phenylene bisnucleophiles resulted in the formation of benzo-fused heterocycles: reactions with о-phenylenediamines and о-aminophenols gave six-membered N,N- and N,O-heterocycles – (Z)-3-nitromethylidene-3,4-dihydroquinoxalin-2(1Н)-ones and (Z)-3-nitromethylidene-3,4-dihydro-2Н-1,4-benzoxazin-2-ones, while the use of pyrocatechols
                                    烷基3-溴-3- nitroacrylates与N,N-,N,O-,和О的反应中,О-邻-亚苯基bisnucleophiles导致苯并稠合的杂环的形成:用反应о苯二
胺类和о
氨基苯酚都给六元N,N-和N,O-杂环- (ż)-3- nitromethylidene -3,4-二氢
喹喔啉-2(Н) -酮和(ž)-3- nitromethylidene -3,4-二氢-2Н -1,4-苯并恶嗪-2-酮,而
邻苯二酚的使用导致形成五元O,O-杂环系统,提供烷基2-(硝基甲基)-1,3-苯并二
恶唑-2 -
羧酸盐。显示获得的六元杂环的亚
硝胺部分经历互变异构转化。