The reaction of 6-bromocyclohepta[b][1,4]benzoxazine (19) and o-aminophenol (3) was studied and compared with that of 3-bromo-2-methoxytropone (2) with 3. 14H-[1,4]Benzoxazino[3′,2′:3,4]cyclohepta[1,2-b][1,4]benzoxazine, 10-(o-hydroxyanilino)cyclohepta[b][1,4]benzoxazine (D), 1- and 4-formylphenoxazines and their Schiff bases (C and X) were obtained in very good yields by modifying the conditions of the reaction of 19 with 3. Structures of D, C, and their isomers were determined and the possible reaction pathways for the formation of various products are discussed.
研究了6-
溴环七苯并[1,4]苯并噁嗪(19)与邻
氨基
酚(3)的反应,并与3-溴-2-甲氧基脱
丙酮(2)与3的反应进行了比较。通过修改19与3的反应条件,成功获得了14H-[1,4]苯并噁嗪[3′,2′:3,4]环七[1,2-b][1,4]苯并噁嗪、10-(邻羟基
苯胺基)环七[1,4]苯并噁嗪(D)、1-和4-羰基苯噁嗪及其施夫碱(C和X),产率非常可观。确立了D、C及其异构体的结构,并探讨了各种产物形成的可能反应路径。