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Reactions of 3-Acetyltropolone Methyl Ethers with o-Phenylenediamine. Formation of Cycloheptabenzodiazepine
Imafuku, Kimiaki,Yamane, Akio,Matsumura, Hisashi
, p. 335 - 338 (2007/10/02)
Reactions of 3-acetyltropolone methyl ethers with o-phenylenediamine are described. 3-Acetyl-2-methoxytropone (2a) with o-phenylenediamine in ethanol under reflux condition to afford 11-hydroxy-6-methylcycloheptabenzodiazepine (4), 10-acetyl-6H-cycloheptaquinoxaline (5), and 6-acetyl-5H-cycloheptaquinoxaline (6).The same reaction of 7-acetyl-2-methoxytropone (2b) gave 7-acetyl-2-(2-aminoanilino)tropone (3b) besides 4, 5, and 6.The compound 4 has a 1,4-diazaheptalene skeleton.
