Methoxycarbonyl migration in 3-methylene-1,4-cyclohexadienes. An extension of the von Auwers rearrangement
作者:Mehdi Boumediene、Raphaël F. Guignard、Samir Z. Zard
DOI:10.1016/j.tet.2016.03.032
日期:2016.6
Upon heating, 3-methylene-1,4-cyclohexadienes possessing an alkoxycarbonyl substituent in position 6 undergo rearrangement and concomitant aromatization to give the corresponding arylacetates. This transformation represents a modification of the von Auwers rearrangement and proceeds by a radical chain mechanism. The intermediate alkoxycarbonyl radical can be intercepted allowing further useful synthetic
加热后,在6位具有烷氧羰基取代基的3-亚甲基-1,4-环己二烯进行重排并伴随芳构化,得到相应的芳基乙酸酯。这种转变代表了冯·奥维尔(von Auwers)重排的一种变型,并通过自由基链机制进行。中间烷氧基羰基基团可以被截获,从而允许进一步有用的合成变化。