The reaction products of the title substances in hot acetic acid were separated by preparative TLC into compounds A–L according to the Rf-values, and the structural assignments for these products were now made as follows: A, 14H-[1,4]benzoxazino[3′,2′ : 3,4]cyclohepta[1,2-b][1,4]benzoxazine; B, 1-formylphenoxazine; F, cyclohepta[2,1-b : 2,3-b′]di[1,4]benzoxazine; G, cyclohepta[b][1,4]benzoxazin-10(11H)-one or its enolic form; J, cyclohepta[b][1,4]benzoxazin-6(11H)-one; L, 6-(o-hydroxyanilino)cyclohepta[b][1,4]benzoxazine hydrobromide. A small amount of 2-methylamino-3H-phenoxazin-3-one was also produced. Possible reaction pathways for the formation of these products are also discussed.
标题物质在热
醋酸中的反应产物经制备型 TLC 根据 Rf 值分成 A-L 化合物,这些产物的结构分配如下:A, 14H-[1,4]benzoxazino[3′,2′ : 3,4]cyclohepta[1,2-b][1,4]benzoxazine; B, 1-formylphenoxazine; F, cyclohepta[2,1-b :G,
环庚烷并[b][1,4]苯并
恶嗪-10(11H)-酮或其烯醇形式;J,
环庚烷并[b][1,4]苯并恶嗪-6(11H)-酮;L,6-(邻羟基
苯胺基)
环庚烷并[b][1,4]苯并恶嗪
氢溴酸盐。此外,还生成了少量 2-甲基
氨基-3H-苯并恶嗪-3-酮。此外,还讨论了形成这些产物的可能反应途径。