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A convenient synthesis of ethyl 2-(4-nitrophenyl)-3,4-disubstituted and c-fused thiophene-5-carboxylates

✍ Scribed by D. W. Rangnekar; S. V. Mavlankar


Book ID
112130114
Publisher
Journal of Heterocyclic Chemistry
Year
1991
Tongue
English
Weight
180 KB
Volume
28
Category
Article
ISSN
0022-152X

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## Abstract Synthesis of ethyl 2‐arylazo‐4,9‐dioxonaphtho[2,3‐__b__]thiophene‐3‐carboxylate was achieved by diazotization of ethyl 2‐amino‐4,9‐dioxonaphtho[2,3‐__b__]thiophene‐3‐carboxylate and coupling with selected __N,N__‐dialkylanilines. The key intermediate ethyl 2‐amino‐4,9‐dioxonaphtho[2,3‐_