Novel alkylaluminium chloride promoted [2+2] cycloaddition reactions of styrenes with 1,4-naphthoquinones and bromoquinones: A facile route to orthoquinodimethane precursors
作者:William S Murphy、Daniel Neville
DOI:10.1016/s0040-4039(97)82974-7
日期:1996.12
The first examples of a Lewis acid catalysed [2+2]cycloaddition between styrenes and naphthoquinones have been observed. The reactions of both methoxyl and acetoxylnaphthoquinones were both regio- and stereospecific. When m-methoxystyrene was employed a novel tetracycle was also formed, and by an unexpected mechanistic pathway. Extension to bromoquinones resulted ultimately in the formation of ary
已经观察到路易斯酸在苯乙烯和萘醌之间催化的[2 + 2]环加成反应的第一个例子。甲氧基和乙酰氧基萘醌的反应都是区域特异性和立体特异性的。当米-methoxystyrene采用了这样的新颖的四环也形成,并且由一个意想不到的机械途径。扩展为溴醌最终导致形成芳基萘环丁烯,这是邻醌二甲烷的常见前体。