作者:Hidemitsu Uno、Yasukazu Shiraishi、Yuji Matsushima、Ayumi Yayama、Hitomi Suzuki
DOI:10.1246/bcsj.64.842
日期:1991.3
Treatment of 4-perfluoroalkyl-4-hydroxy-2,5-hexadien-1-one (4-perfluoroalkyl-4-quinol), prepared from the reaction of 1,4-benzoquinone with perfluoroalkyllithium, with acetic anhydride–sulfuric acid gave a mixture of 2,4-diacetoxy-1-perfluoroalkylbenzene and 1,2-diacetoxy-4-perfluoroalkylbenzene in a comparable ratio. When 4-perfluoroalkyl-4-quinols bearing a methyl group ortho to the perfluoroalkyl group were subjected to the rearrangement, acetoxymethyl compounds were obtained in addition to diacetoxybenzene derivatives. Only 1,3-migration was observed in the cases of 2,4-di-t-butyl-4-perfluorooctyl-4-quinol and 4-hydroxy-4-perfluoroalkyl-1(4H)-naphthalenone, while the reaction of 2,6-dimethyl and 2-methoxy derivatives gave only 1,2-shift products. Reaction routes to the apparent 1,2- and 1,3-acetoxyl migration products are discussed.
4-全氟烷基-4-羟基-2,5-己二烯-1-酮(4-全氟烷基-4-喹啉)与醋酸酐-硫酸反应后,得到的产物是2,4-二乙酰氧基-1-全氟烷基苯和1,2-二乙酰氧基-4-全氟烷基苯的混合物,二者的比例相当。当含有正对全氟烷基组的甲基的4-全氟烷基-4-喹啉进行重排时,除了二乙酰氧基苯衍生物外,还获得了乙酰氧基甲基化合物。在2,4-二叔丁基-4-全氟辛基-4-喹啉和4-羟基-4-全氟烷基-1(4H)-萘酮的例子中,仅观察到1,3-迁移,而2,6-二甲基和2-甲氧基衍生物的反应只生成了1,2-迁移产物。讨论了显著的1,2-和1,3-乙酰氧基迁移产物的反应途径。