Process for producing [1,4′]...

Details Process for producing [1,4′]... Process for producing [1,4′]...

2006-02-06

2010-02-16

Seaman, D. Margaret (Department: 1625)

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

Reexamination Certificate

active

07662964

ABSTRACT:
The present invention is related to a process for the preparation of [1,4′]bipiperidinyl-1′-carbonyl chloride or its hydrochloride using methylene chloride as a solvent in the reaction of 4-piperidinopiperidine with phosgene and the removing the reaction solvent by using an additional distillation solvent to raise the distillation temperature.

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