作者:John W. Barton、Michael C. Goodland、Ken J. Gould、John F.W. Mcomie、W.Roderick Mound、Sadiq A. Saleh
DOI:10.1016/s0040-4020(01)99488-8
日期:1979.1
As possible routes to 1,4-diazabiphenylene and its 2,3-disubstituted derivatives we have studied the condensation of benzocyclobutene-1,2-dione (BBD) with various 1,2-diamines. Instead of giving the 1,4-diazabiphenylene ring system, BBD reacted with ethylenediamine, diaminomaleonitrile, 4,5-diaminopyrimidine, 2-aminopyridine, also 2,3- and 3,4-diaminopyridine to give, respectively, 2-o-carboxyphenylimidazolidinium
作为制备1,4-二氮杂联苯及其2,3-二取代衍生物的可能途径,我们研究了苯并环丁烯1,2-二酮(BBD)与各种1,2-二胺的缩合反应。BBD与提供1,4-二氮杂联苯环体系不同的是,它与乙二胺,二氨基马来腈,4,5-二氨基嘧啶,2-氨基吡啶,2,3-和3,4-二氨基吡啶反应分别生成2-邻-羧基苯基咪唑啉乙酸甲酯4,3,4-二氰基-2,5-二氢[2,5] benzodiazocine -1,6-二酮10,4-氨基-5A,9B二氢-5-,9B二羟基苯并[3' ,4' ] cyclobuta [1' ,2'-4,5]咪唑并[1,2 ç ]嘧啶14,图5A,图9b二氢5α,9B二羟基苯并[3' ,4 '] cyclobuta [1',2'- 4,5]咪唑[1,中,4-氨基衍生物16,后者的,和两性离子18的4 -氨基-3-(2-羧基亚苄基)。然而,BBD与4,5- diaminobenzotriazole反应,得到预期的1