A synthetic route to tercyclohexanones is described in which alkylation of 4-cyclohexylcyclohexanone with the dianion of 4,4-(ethylenedioxy)cyclohexanecarboxylic acid gives 1-carboxy-1′-hydroxyl-1,1′:4′,1″-tercyclohexan-4-one ethylene ketal. Decarboxylative dehydration of the latter followed by hydrolysis of the ketal gives 4-(4′-cyclohexylcyclohexylidene)cyclohexanone. Hydrogenation of this compound gives cis- and trans-1,1′:4′,1″-tecyclohexan-4-one, the latter of which is correlated with authentic trans-1,1′:4′,1″-tercyclohexane.
描述了三
环己酮的合成路线,其中
4-环己基环己酮与 4,4-(亚乙二氧基)
环己烷羧酸的二元离子发生烷基化反应,得到 1-羧基-1′-羟基-1,1′:4′,1″-三
环己烷-4-酮亚乙基
缩酮。对后者进行脱羧脱
水,然后
水解
缩酮,得到 4-(4′-环己基-环己亚基)
环己酮。对这种化合物进行氢化可得到顺式和反式-1,1′:4′,1″-十
环己烷-4-酮,后者与正宗的反式-1,1′:4′,1″-
环己烷相关。