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Synthesis of 2-N-(benzo[b]thiophen-2-yl)benzo and heterofused-1,2,3-triazoles

✍ Scribed by R. W. Sabnis; D. W. Rangnekar

Book ID
112129538
Publisher
Journal of Heterocyclic Chemistry
Year
1990
Tongue
English
Weight
301 KB
Volume
27
Category
Article
ISSN
0022-152X

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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

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The synthesis of thieno[3,2-clcinnoline is described; this compound gives benzo [3,4]cyclobuta[1,2-blthiophene. ## vapour phase thermolysis of The considerable stability of biphenylene, a system containing fused 4n and (4n+2) ITelectron rings, is associated with the fact that its structure corres