title: [The synthesis of 3-amino-5-(4-pyridinyl)-1,2-dihydropyrid-2-one (Cordemcura) from a technical mixture of pyridines].
abstract: For preclinical and clinical research the headline compound 6 has been synthesized from pyrid-4-yl-malondialdehyde (3) and its bis-N,N-dimethyl)-aldimin-derivative 1 by cyclization with cyanoacetamide giving 4, partial hydrolysis to the amide 5, and degradation by sodiumhypochlorite to the amine 6, concerning to the way described in patent literature. Starting product was a mixture of alkyl pyridines from which 4-picoline reacted selectively with the Vilsmeyer-complex of phosgene/DMF to give cristalline 1. Optimization in all steps resulted in a procedure that gives us the intermediates in good yields and qualities and the final product 6 with high purity, suitable for pharmaceutical use.
mesh_terms: D000631:Aminopyridines / Q000138:chemical synthesis*; D000676:Amrinone; D002316:Cardiotonic Agents / Q000138:chemical synthesis*; D055598:Chemical Phenomena; D002621:Chemistry; D011725:Pyridines
chemical_list: D000631:Aminopyridines; D002316:Cardiotonic Agents; D011725:Pyridines; D000676:Amrinone
vernacular_title: Untersuchungen zur Synthese von 3-Amino-5-(pyrid-4-yl)-1,2-dihydro-pyrid-2-on (Cordemcura) aus technischen Pyridinbasengemischen.