Method for preparing 4-methylamino-4-phenylpiperidine

Details Method for preparing 4-methylamino-4-phenylpiperidine Method for preparing 4-methylamino-4-phenylpiperidine

2005-07-12

2005-07-12

Saeed, Kamal A. (Department: 1626)

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

Reexamination Certificate

active

06916929

ABSTRACT:
The invention relates to a process for preparing a 4-alkoxycarbonylamino-1-benzyl-4-phenylpiperidine of formula (I)via hydrolysis of 1-benzyl-4-cyano-4-phenylpiperidine (II) in acidic medium and treatment of the 1-benzyl-4-phenyl-4-piperidinecarboxamide (III) thus obtained with bromine in the presence of an alkali metal alkoxide.The invention also relates to a process for preparing 4-methylamino-4-phenylpiperidine from compound (II).

REFERENCES:
patent: 6716846 (2004-04-01), Tulshian et al.
Wilson, W., Journal of the Chemical Society, London, pp. 2173-2176 (1950).
Kalir, Pelah, Israel Journal of Chemistry, vol. 5, pp. 223-229 (1967).

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