The oxymercuration of 4-methylenecyclohexanemethanol intert-butyl alcohol yields 1-chloromercurimethylnorcineole which may be converted to 1-methylnorcineole by borohydride reduction or to 4-chloromercurimethyl-4-↑-hydroxycyclohexane-↓-carboxylic acid. This may be deoxymercurated to 4-methylenecyclohexanecarboxylic acid and reduced with borohydride to 4-↓-methyl-4-↑-hydroxycyclohexane-↓-carboxylic acid.