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US 2003/0153773 A1Published application
Process for the production of dihydropyridines
OwnerGregory S. Wayne, Wenke Liinventors
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Abstract
The present invention relates to the production of a salt of a bis-condensation reaction.
Claims9
A process for producing a salt of a bis-condensation reaction product comprising reacting a diketone and an aldehyde in the presence of a base and a solvent.
A compound and salts thereof of formula 3, wherein R is selected from the group consisting of substituted and unsubstituted aryl and heterocycle.
- 2
A process for removing dihydropyran from dihydropyridine comprising dissolving dihydropyridine in a mixture of aqueous base and an organic solvent, followed by acidification.
Dependencies are inferred from the claim text.