Process for the preparation of unsymmetrical dihydropyridines

Details Process for the preparation of unsymmetrical dihydropyridines Process for the preparation of unsymmetrical dihydropyridines

C - Chemistry, Metallurgy

07

D

260/294.2

C07D 211/90 (2006.01)

Patent

CA 1314289

ABSTRACT OF THE DISCLOSURE In the preparation of nitrenedipine by reaction of an ylidene compound of the formula (IIa) or Image (IIb) with an enamine compound of the formula (IIIa) or Image (IIIb), the improvement which comprises effecting the reaction in the presence of a catalytic amount of diisopropylamine acetate or dimethylbenzylamine acetate. The product is produced in high yield with reduced amounts of symmetrical by-products. Le A 25 669

585040

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