Process for the preparation of cyclic diketones

Details Process for the preparation of cyclic diketones Process for the preparation of cyclic diketones

2006-11-14

2006-11-14

McKenzie, Thomas (Department: 1625)

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C549S498000, C568S043000, C568S030000

Reexamination Certificate

active

07135574

ABSTRACT:
The present invention relates to a process for the preparation of compounds of formula Iwherein the substituents are as defined in claim 1, by conversion of a compound of formula IIreaction of that compound with a compound of formula IVin-line-formulae description="In-line Formulae" end="lead"?X—C(O)—Q,  (IV)in-line-formulae description="In-line Formulae" end="tail"?wherein X is a leaving group, to form a compound of formula Vand treatment of that compound in the presence of a base with catalytic amounts of cyanide ions.

REFERENCES:
patent: 3932510 (1976-01-01), Müller
patent: 6855831 (2005-02-01), Schneider et al.
patent: 0186117 (1985-07-01), None
patent: 00/15615 (2000-03-01), None
patent: 00/37437 (2000-06-01), None
patent: 01/66533 (2001-09-01), None
patent: 01/94339 (2001-12-01), None
Ca 140:42184, “Preparation of Herbicidally Active Nicotinoyl Derivatives”, Luethy, et al; WO2003106448.

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