title: Synthesis of highly functionalized 2(1H)-pyrazinone 3-carboxamide scaffolds.
abstract: Synthesis of highly functionalized 2(1H)-pyrazinone 3-carboxamide derivatives is reported. A one-pot, two-step process including the base-mediated reaction of N,N-disubstituted aminoacetonitrile derivatives 18 with 3,5-dihalo-2(1H)-pyrazinones 1 afforded substituted aminoacetonitrile pyrazinone derivative 19, which on subsequent oxidation followed by transamidation of the resulting intermediate with primary or secondary amines gave the corresponding highly functionalized 2(1H)-pyrazinone 3-carboxamide derivatives 21.
authors.affiliation: Molecular Design and Synthesis, Department of Chemistry, Katholieke Universiteit Leuven, Celestijnenlaan 200F, 3001 Leuven, Belgium.
authors.forename: Sonalika V
authors.initials: SV
authors.lastname: Pawar
authors.forename: Vijaykumar G
authors.initials: VG
authors.lastname: Pawar
authors.forename: Wim
authors.initials: W
authors.lastname: Dehaen
authors.forename: Wim M
authors.initials: WM
authors.lastname: De Borggraeve