Advanced Synthesis and Catalysis p. 414 - 419 (1997)
Update date:2022-08-03
Topics:
Dunkel
Hess
Reck
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 dimethy lamine 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.
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