Process for the production of cyclic diketones

Details Process for the production of cyclic diketones Process for the production of cyclic diketones

2011-02-22

2011-02-22

Davis, Zinna N (Department: 1625)

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C560S012000, C560S059000, C570S190000

Reexamination Certificate

active

07893270

ABSTRACT:
The present invention relates to a process for the preparation of compounds of formula (I), wherein the substituents are as defined in claim1, by reacting a compound of formula (II), with a bromine or chlorine source to form a compound of formula (III), wherein X is chlorine or bromine; reacting that compound with water to form the compound of formula (IV), converting that compound, using a compound of formula (V), wherein M+is the hydrogen cation or an alkali metal ion, alkaline earth metal ion or ammonium ion, into the compound of formula (VI), and treating that compound with a cyanide source in the presence of a base.

REFERENCES:
patent: 2002/0016345 (2002-02-01), Edmunds et al.
patent: 2002/0165096 (2002-11-01), Schaetzer et al.
patent: 1352901 (2003-10-01), None
Database Beilstein [online]; XP-002339791 Accession No. Rid 4517729: Abstract, 1996.

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