Process for the manufacture of fused piperazin-2-one...

Details Process for the manufacture of fused piperazin-2-one... Process for the manufacture of fused piperazin-2-one...

2007-07-03

2007-07-03

Berch, Mark L. (Department: 1624)

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

Organic compounds

Four or more ring nitrogens in the bicyclo ring system

C544S231000

Reexamination Certificate

active

11284836

ABSTRACT:
Disclosed are processes for the preparation of fused piperazin-2-one derivatives of general formula (I)wherein the groups R1to R5, A1and A2have the meanings given in the claims and in the description, particularly the preparation of 7,8-dihydro-5H-pteridin-6-one derivatives and intermediates thereof.

REFERENCES:
patent: WO 96/36597 (1996-11-01), None
patent: WO 03/020722 (2003-03-01), None
Tenbrink, R. E. et. al., “Antagonist, Partial Agonist, and Full Agonist Imi8dazo[1,5-a]quinoxaline Amides and Carbamates Acting through the GABA a/Benzodiazepine Receptor”, J. Med. Chem, 1994, 37, 758-768.

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