ABSTRACT
The one-pot synthesis of a novel class of 5-(2-alkoxy-2-phenyl-1-N-phenylthiocarbamoylethenyl)-6-oxo-1,6-dihydropyrazine-2,3-dicarbonitriles (2a–o) is achieved in moderate to good yields by the sequential reaction between 4-benzoyl-5-phenylamino-2,3-dihydrothiophene-2,3-dione, diaminomaleonitrile and alcohols.
GRAPHICAL ABSTRACT
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Disclosure statement
No potential conflict of interest was reported by the authors.
ORCID
Hassan Kabirifard http://orcid.org/0000-0003-2680-8051