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Synthesis and properties of some novel pyrazolone-based heterocyclic azo disperse dyes containing a fluorosulfonyl group

✍ Scribed by Ajay Singh; Ran Choi; Byunghun Choi; Joonseok Koh

Book ID
119230927
Publisher
Elsevier Science
Year
2012
Tongue
English
Weight
405 KB
Volume
95
Category
Article
ISSN
0143-7208

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## Abstract 3‐Amino‐1‐phenyl‐4,5‐dihydro‐1__H__‐pyrazol‐5‐one (**1**) was used as starting material for the synthesis of a number of azo compounds **3a–3c** and azomethine derivative **4**. The deblocking of **3a**–**3c** and **4** gave rise to **5a**–**5c** and **6** in which a free amino was reve