Spirodienones. Part 2. The synthesis of some heterocyclic spirodienones by phenolic coupling
作者:Ian G. C. Coutts、Michael R. Hamblin、Sheila E. Welsby
DOI:10.1039/p19810000493
日期:——
and of p-fluoranil. Attempted ether formation with 2,6-di-t-butyl-4-bromophenol and either 2- or 3-methoxyphenol failed, small quantities of unsymmetric biphenyls being formed in a novel arylation reaction. A spirobenzoxazole can be prepared by oxidation of a 2,4′-dihydroxydiphenylamine. Substituent effects in the hydrolysis of derived spirodienols have been observed.
描述了用活性二氧化锰将一系列的2,4'-二羟基二苯醚氧化为相应的对-苯醌单缩醛(1,3-苯并二恶唑-2-螺环己二烯-4'-酮);制备的二烯酮之中是硝基的单缩醛p醌和p -fluoranil。尝试用2,6-二叔丁基-4-溴苯酚和2-或3-甲氧基苯酚形成醚失败,在新的芳基化反应中形成了少量不对称联苯。可以通过氧化2,4'-二羟基二苯胺来制备螺苯并恶唑。已经观察到在衍生的螺二烯醇的水解中的取代作用。