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Substitution reactions of benzo[b]thiophen derivatives. Part III. Nitration of benzo[b]thiophen-2-carboxylic acid and its 3-methyl derivative

✍ Scribed by Cooper, J.; Scrowston, R. M.

Book ID
118004378
Publisher
The Royal Society of Chemistry
Year
1971
Tongue
English
Weight
759 KB
Category
Article
ISSN
0022-4952

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## Abstract Benzo[b]thiophene‐2,3‐diones (**1**) react with __Grignard__ reagents to yield 2,3‐dihydroxy‐2,3‐diaryl(aralkyl)benzo[b]‐thiophenes (**2**). The latter compounds yield 3,3‐diaryl(aralkyl)‐benzo[b]thiophene‐2‐ones (**3**) by pinacolone rearrangement. Treatment of **3** by hot ethanolic s