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Synthesis of Novel Azo Dyes Containing the Thiophene Moiety

✍ Scribed by H. R. Maradiya; V. S. Patel

Book ID
110415818
Publisher
Springer US
Year
2002
Tongue
English
Weight
119 KB
Volume
38
Category
Article
ISSN
0009-3122

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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