Process for hydroxyazapirones

Details Process for hydroxyazapirones Process for hydroxyazapirones

2005-05-24

2005-05-24

Balasubramanian, Venkataraman (Department: 1624)

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

Organic compounds

Nitrogen attached directly or indirectly to the purine ring...

Reexamination Certificate

active

06897309

ABSTRACT:
This invention describes a process for preparing hydroxyazapirones of Formula I from azapirones of Formula II. The process comprises treating azapirones with a strong base, monitoring enolate formation of the azapirone by IR spectroscopy, and reacting the enolate with a source of molecular oxygen in the presence of a reductant. The process is suitable for large scale production of hydroxyazapirones.

REFERENCES:
patent: 6150365 (2000-11-01), Mayol
patent: 6593331 (2003-07-01), Camborde et al.
patent: 20030022899 (2003-01-01), Yevich et al.
patent: 20030055063 (2003-03-01), Yevich et al.
patent: WO 0145687 (2001-06-01), None
patent: WO 0216347 (2002-02-01), None

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