Synthese von cyanosubstiuierten Di- und Tetrahydropyridinen in DIMCARB (Dimethylamin-CO2-Additionsverbindung)
作者:S. Dunkel、U. Heß、G. Reck
DOI:10.1002/prac.19973390173
日期:——
A new selective method for base-catalyzed ring closure reaction of acetophenones (1a-1) with malononitrile in DIMCARB (dimethylamine-CO2-addition-compound) as solvent of high dimethylamine concentration is reported which allows effective syntheses of (1.2-dihydro-4-pyrid-6-yl)dicyanomethanides and 5-cyano-6-dicyanomethylene-1,2,3,6-tetrahydropyridines in good yields, The structure of the two new classes of compounds is proved by X-ray diffraction analysis.