Method for making piperidone ketals using polyphosphoric acid

Details Method for making piperidone ketals using polyphosphoric acid Method for making piperidone ketals using polyphosphoric acid

2005-02-08

2005-02-08

Desai, Rita (Department: 1625)

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C546S019000

Reexamination Certificate

active

06852860

ABSTRACT:
A method for making piperidone ketals by condensing a suitable alcohol with a piperidone in the presence of polyphosphoric acid.

REFERENCES:
patent: 6524348 (2003-02-01), Jewell et al.
patent: WO 0123309 (2001-04-01), None
patent: 55041432 (1980-03-01), None
patent: 56-138189 (1981-10-01), None
Meskens F, “Methods for the Preparation of Acetals,” Janssen Chimica 1(1) 1983, pp. 10-17.

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