Facile synthesis of 1,3,6-oxadiazepines from 2,2′-(1,2-ethanediyldiimino)bisphenols
作者:Ma.Eugenia Ochoa、Susana Rojas-Lima、Herbert Höpfl、Patricia Rodrı́guez、Dolores Castillo、Norberto Farfán、Rosa Santillan
DOI:10.1016/s0040-4020(00)00984-4
日期:2001.1
A useful sequence of reactions for the syntheses of a variety of heterocyclic systems including an oxadiazepine ring is described. The key step involves the condensation of substituted 2,2′-(1,2-ethanediyldiimino)bisphenols with ethanedial to provide stereoselectively the 6a,7a-trans-6,6a,7a,8,15,16-hexahydro[1,4]benzoxazine[4′,3′:6,7][1,3,6]oxadiazepino[2,3-c][1,4]-benzoxazine-6,8-diol framework,
描述了用于合成包括恶二氮杂环的各种杂环系统的有用的反应序列。关键步骤涉及取代的2,2'-(1,2-乙二基二亚氨基)双酚与乙二醛的缩合反应,以立体选择性地提供6a,7a-trans-6,6a,7a,8,15,16-六氢[1,4] X射线衍射确定的]苯并恶嗪[4',3':6,7] [1,3,6]恶二氮杂环庚烷[2,3- c ] [1,4]-苯并恶嗪-6,8-二醇骨架分析。