isomerization of polyynes is described. Benzyne intermediates substituted by a C(RR′)OR′′ substituent adjacent to one of the benzyne sp-hybridized carbons give rise to products in which the OR′ moiety has migrated to the proximal benzyne carbon. This process likely proceeds via sequential formation of multiple reactive intermediates: an initial thermally generated benzyne, a strained benzoxetenonium ion,
描述了聚炔的新的热异构化。苯并中间体被苯并炔杂杂化碳原子之一附近的C(RR')OR''取代基取代,生成的产物中OR'部分已迁移至近端苯并炔碳。该过程可能是通过依次形成多种反应性中间体来进行的:初始热生成的苯炔,应变的苯并氧杂
环丁酮离子和邻醌甲基化物。如一些示例所示,整体转换可能非常有效。实验和DFT计算进一步支持了这种新颖反应的机理。