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Treatment of N‐2‐(1,1‐dichloroalkylidene) cyclohexylamines with excess sodium methylate in methanol under reflux afforded N‐2‐(1,1‐dimethoxyalkylidene)‐cyclohexylamines, which were hydrolysed to the corresponding 1,1‐dimethoxy‐2‐alkanones. N‐1‐(2,2‐dichloro‐1‐phenylpropylidene) cyclohexylamine on the other hand yielded dehydrochlorination and nucleophilic substitution.
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Kimpe et al. (1974) studied this question.
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