Reactive troponoids and o-aminophenol. II. The formation of cyclohepta [b][1, 4] benzoxazine and 11H-cyclohepta [b][1, 4] benzoxazin-10-one derivatives from …

T Nozoe, T Someya

Index: Nozoe,T.; Someya,T. Bulletin of the Chemical Society of Japan, 1978 , vol. 51, p. 3316 - 3319

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Citation Number: 20

Abstract

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 ...