Reactive Troponoids and<i>o</i>-Aminophenol. II. The Formation of Cyclohepta[<i>b</i>][1,4]benzoxazine and 11<i>H</i>-Cyclohepta[<i>b</i>][1,4]benzoxazin-10-one Derivatives from Isomeric Isopropyl-2-chlorotropones
作者:Tetsuo Nozoe、Taichi Someya
DOI:10.1246/bcsj.51.3316
日期:1978.11
The reactions of three isomeric isopropyl-2-chlorotropones with o-aminophenol were investigated. 8-Isopropylcyclohepta[b][1,4]benzoxazine was obtained from 5-isopropyl-2-chlorotropone, while 4- and 6-isopropylderivatives gave the same mixture of 7- and 9-isopropylcyclohepta[b][1,4]benzoxazine. These facts showed that the amino group of o-aminophenol attacked both the C-1 and C-2 positions of 2-chlorotropones. Also 6-, 7-, and 8-isopropyl-11H-cyclohepta[b][1,4]benzoxazin-10-ones were obtained as the minor products of these reactions.
对三种异构体异丙基-2-氯托烯的反应与邻氨基酚进行了研究。5-异丙基-2-氯托烯得到了8-异丙基环七[b][1,4]苯噁嗪,而4-和6-异丙基衍生物则生成了相同的7-和9-异丙基环七[b][1,4]苯噁嗪混合物。这些事实表明邻氨基酚的氨基攻击了2-氯托烯的C-1和C-2位。同时,6-、7-和8-异丙基-11H-环七[b][1,4]苯噁嗪-10-酮也作为这些反应的次要产物得到了。