Organic compounds -- part of the class 532-570 series – Organic compounds – Nitrogen attached directly or indirectly to the purine ring...
Reexamination Certificate
2005-02-08
2005-02-08
Berch, Mark L. (Department: 1624)
Organic compounds -- part of the class 532-570 series
Organic compounds
Nitrogen attached directly or indirectly to the purine ring...
C436S098000
Reexamination Certificate
active
06852858
ABSTRACT:
Zaleplon can be separated from a regioisomer impurity by crystallization from selected solvents or by adding an anti-solvent to a solution of zaleplon and the regioisomer. Zaleplon crystalline Forms II, III, IV, and V are useful for the treatment of insomnia. These crystalline Forms are described along with processes for making them v crystallization from selected solvents.
REFERENCES:
patent: 4626538 (1986-12-01), Dusza
patent: 5714607 (1998-02-01), Padmanathan
patent: WO 200212244 (2002-02-01), None
Mustazza, J. Het. Chem. 38, 1119 (2001).
Feher Erika
Korodi Ferenc
Magyar Erika
Singer Claude
Berch Mark L.
Biogal Gyogyszergyar Rt.
Kenyon & Kenyon
LandOfFree
Process for purifying... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Process for purifying..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for purifying... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3470110