| 摘要 |
NEW MATERIAL:A compound of formula I [X is H, halogen, nitro, alkoxycarbonyl, or acetyl; Y is cyano, or alkoxycarbonyl; R<1> is methyl, ethyl or phenyl; R<2> is H or (substituted)alkyl]. EXAMPLE:A compound of formula II. USE:Dye capable of dyeing synthetic fibers such as polyester, triacetate, diacetate orange - red. Excellent in resistance to light, sublimation and water. PREPARATION:An amine of formula III is diazotized followed by coupling between the resulting diazo compound and an aminothiophene of formula IV. The monoazo compound of formula V thus formed is diazotized followed by coupling the resultant diazo compound and a pyridone of formula VI.
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