Process for preparing...

Details Process for preparing... Process for preparing...

2007-10-02

2007-10-02

Chang, Celia (Department: 1625)

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C546S187000

Reexamination Certificate

active

10491051

ABSTRACT:
The present invention concerns a process for preparing 4-(hydroxy)-[1,4′]bipiperidinyl-1′-carboxylic acid tert-butyl ester, comprising hydrogenating a mixture of 4-hydroxypiperidine and 1-tert-butoxycarbonyl-4-piperidone in a suitable solvent, in the presence of a suitable catalyst and at a suitable pressure.

REFERENCES:
patent: 6294554 (2001-09-01), Clader et al.
patent: 6387899 (2002-05-01), Berg et al.
patent: 6525070 (2003-02-01), Rigby et al.
patent: 1070712 (2001-01-01), None
patent: WO 01/77101 (2001-10-01), None
Assignment record US. 6,525,070.
Assigment recort PCT/SE02/01802.
Tsang et al. “Solid supported organotin hydrides for hydrogenation” CA 2000:794929 (2000).
Zaluski et. al. “Hydrogenation properties of complex alkali metal hydrides . . . ” J. Alloys and Compounds 290 p. 71-78 (1999).

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