Synthesis and properties of some pyridone chromium complex azo dyes
β Scribed by Ing Jing Wang; Yu Jen Hsu; Jyn Hen Tian
- Publisher
- Elsevier Science
- Year
- 1991
- Tongue
- English
- Weight
- 457 KB
- Volume
- 16
- Category
- Article
- ISSN
- 0143-7208
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## Abstract 3βAminoβ1βphenylβ4,5βdihydroβ1__H__βpyrazolβ5βone (**1**) was used as starting material for the synthesis of a number of azo compounds **3aβ3c** and azomethine derivative **4**. The deblocking of **3a**β**3c** and **4** gave rise to **5a**β**5c** and **6** in which a free amino was reve
Polyurethane elastomers pendant with azo-dye were prepared by N-substitution by a twostep process. First, the polymer is metalated by sodium hydride, and then the prepared urethane polyanion is treated with w-bromohexyloxyphenyl-p-nitroazobenzene. The polyurethanes were characterized by NMR, UV, FTI