作者:Katsuo Kikuchi
DOI:10.1246/bcsj.40.355
日期:1967.2
The positions of the double bonds in 1-phenylcyclohexadiene-1,2-dicarboxylic acid, which had been obtained previously by the alkaline rearrangement of 2-phenyltropone-7-carboxylic acid, were elucidated from the spectral data. A similar rearrangement of tropone derivatives to dihydrobenzene derivatives was also observed. Tropone-2-carboxylic acid gave 2,5-cyclohexadiene-1,2-dicarboxylic acid, while 2-phenyltropone-5-carboxylic acid afforded 1-phenyl-2,4-cyclohexadiene-1,4-dicarboxylic acid. 2-Phenyltropone was also rearranged by alkali to 2-phenyl-2,5-cyclohexadiene-1-carboxylic acid.
光谱数据阐明了 1-苯基环己二烯-1,2-二羧酸中双键的位置,该双键是之前通过 2-苯基托品酮-7-羧酸的碱性重排得到的。还观察到托品酮衍生物与二氢苯衍生物发生了类似的重排反应。托品酮-2-羧酸可生成 2,5-环己二烯-1,2-二羧酸,而 2-苯基托品酮-5-羧酸可生成 1-苯基-2,4-环己二烯-1,4-二羧酸。2-phenyltropone 还能通过碱重新排列为 2-苯基-2,5-环己二烯-1-羧酸。