Acid-Catalyzed Cleavage of 1,4-Dimethyl-1,4-dihydronaphthalene 1,4-Endoperoxide. Reactivity of the Resulting Hydroperoxy Carbocation with Nucleophiles
作者:Charles W. Jefford、Jean-Claude Rossier、Shigeo Kohmoto、John Boukouvalas
DOI:10.1002/hlca.19850680635
日期:1985.9.25
In the presence of acids, 1,4-dimethyl-1,4-dihydronaphthalene 1,4-endoperoxide readily reacts with nucleophiles to produce methyl- and ring-substituted naphthalenes in high yields. The regioselectivity observed depends on the nucleophile. The key intermediate is shown to be the corresponding hydroperoxy carbocation which could be intercepted in certain cases prior to aromatization. The hydroperoxide
在酸的存在下,1,4-二甲基-1,4-二氢萘1,4-内过氧化物容易与亲核试剂反应,以高收率生产甲基和环取代的萘。观察到的区域选择性取决于亲核试剂。关键中间体显示为相应的氢过氧碳正离子,在某些情况下,芳构化之前可能会截获该氢。氢过氧化物也经历霍克型裂解和二聚化,得到2,3-二氢-1-苯并氧杂环丁烷,4-甲基-1-萘酚和1,2,5,6-四氧杂环己烷作为副产物。