Reaction of Monocyclic Ferrocenyl-4,5-dihydropyrazoles with beta-Dicarbonyl Compounds

摘要

Monocyclic 3- and 5-ferrocenyl-4,5-dihydropyrazoles with a free NH group in the molecule react with acetylacetone to form the corresponding enaminocarbonyl compounds.The latter were isolated as a single isomer,presumably E.3-Ferrocenyldihydropyrazoles and 5- ferrocenyl-3-(p-methoxyphenyl)-4,5-di-hydropyrazole analogously react with acetoacetic ester.5-Ferrocenyl-3-phenyl-,3-(p-bromophenyl)-5-ferro-cenyl,and 3,5-diferrocenyl-4,5-dihydropyrazoles react with acetoacetic ester to form acetoacetylpyrazolides.