3- amino-4,4-dicyano-3-butenoate

Diaminothiophenes 24 were prepared in good yield from 3-amino-4,4-dicyano-3-butenoate 23, sulfur, and diethylamine at room temperature. "... [Pg.195]

Sulfur heterocycles. 3-Amino-4,4-dicyano-3-butenoate was reacted with sulfur to yield a 2,4-diaminothiophene. Reaction of 203 with ylidenemalononitrile 204 gave the heterocyclic ylidenemalononitrile 205 . The dicyano-butene derivative 148 was cyclized with sulfur to yield thiophenecarbonic acid esters 206. ... [Pg.819]

Oxo-pyridines were prepared from arylidenemalononitriles and cyanoacetanilide or pyridylcyanoacetamide, from arylidenemalononitrile and potassium cyano-acetohydroxamate, or arylacetohydrazides and by acidic or basic ring-closure of 3-amino-4,4-dicyano-3-butenoate. ... [Pg.821]

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