The dimerization reactions of 2-bromo-3,5,6-trimethyl-1,4-benzoquinone have been examined. 2,2′-Dimeric benzoquinone was prepared via a Stille-type homocoupling, whereas an oxepin was formed by the treatment of the title quinone with hexamethylditin, CuI, and (±)-BINAP in DMF. Two dimerization reactions involving a hetero Diels–Alder reaction between quinones and quinone methides were also observed.
2-
溴-3,5,6-三甲基-1,4-苯醌的二聚反应已被研究。 2,2'-二聚苯醌是通过 Stille 型自偶联制备的,而恶庚英是通过在
DMF 中用
六甲基二锡、CuI 和 (±)-BINAP 处理标题醌而形成的。还观察到涉及醌和醌甲基化物之间的杂狄尔斯-阿尔德反应的两个二聚反应。