| 摘要 |
The present invention provides a highly safe and easily operable process for producing 1-chlorocarbonyl-4- piperidinopiperidine or hydrochloride thereof in a high yield. Described specifically, the present invention relates to a process for producing 1-clorocarbonyl-4- piperidinopiperidine or hydrochloride thereof, which comprises reacting 4-piperidinopiperidine with a trialkylsilyl halide to obtain a 4-piperidinopiperidinyl trialkylsilyl, reacting it with a carbon dioxide gas to obtain a 4-piperidinopiperidinyl trialkylsilyl carbamate derivative, reacting the derivative with thionyl chloride or the like to obtain 1-chlorocarbonyl-4-piperidinopiperidine hydrochloride and optionally treating it with a strong base.
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