The condensation of 2,3-dichloro-1,4-naphthoquinone with nitrocyclohexane and t-butyl cyclohexane-carboxylate has been studied. The product resulting from reaction of the quinone with t-butyl cyclohexane-carboxylate, 3-chloro-2-(1-t-butoxycarbonylcyclohexyl)-1,4-naphthoquinone (3), was readily hydrolysed to the corresponding acid (4). Thermal cyclisation of this compound gave rise to the two isomeric
已经研究了2,3-二
氯-1,4-
萘醌与
硝基环己烷和
叔丁基环己烷-
羧酸酯的缩合。将醌与
环己烷甲酸叔丁酯反应生成的产物3-
氯-2-(1-叔丁氧基羰基环己基)-
1,4-萘醌(3)容易
水解成相应的酸(4)。该化合物的热环化产生了两个异构的醌内酯
萘并[2,3 - b ]
呋喃-3-螺
环己烷-2,4,9(3H)-三酮(8)和
萘并[1,2- b ]。 -
呋喃-3-螺
环己烷-2,4,5(3 H)-三酮(10)。设计了允许仅获得(8)或(10)的程序。