作者:G.I. Fray、G.R. Geen、K. Mackenzie、D.L. Willams-Smith
DOI:10.1016/s0040-4020(01)93741-x
日期:1979.1
in refluxing xylene to afford the cyclo-octatetraenes 12, via a sequence involving [4+2]π-cycloaddition, cheletropic loss of carbon monoxide, extrusion of dimethyl phthalate by [4+2]π-cycloreversion, and finally valence isomerisation by retro-6π electrocyclisation. NMR evidence indicates that the products 12 contain rigid, bond-fixed, non-planar cyclo-octatetraene rings.
乙酰环酮和相关的环戊二烯酮11在回流的二甲苯中与二甲基三环[4.2.0.0 2,5 ] deca-3,7,9-三烯-7,8-二羧酸酯1反应,通过涉及[4]的序列提供环辛酸酯12 +2]π-环加成反应,一氧化碳的亲油性损失,通过[4 + 2]π-环还原反应挤出邻苯二甲酸二甲酯,最后通过逆-6π电环化进行化合价。NMR证据表明产物12含有刚性的,键固定的,非平面的环辛酸酯环。