Thieno[3,4-b]thiophene. The third thiophthene
✍ Scribed by Hans Wynberg; D.J. Zwanenburg
- Publisher
- Elsevier Science
- Year
- 1967
- Tongue
- French
- Weight
- 167 KB
- Volume
- 8
- Category
- Article
- ISSN
- 0040-4039
No coin nor oath required. For personal study only.
✦ Synopsis
We wish to report the synthesis of thieno b,4-blthiophene (I), the only one of the three possible thionhthenes (I-III) (I) which is unknown. Only
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Rust) 160 (calc. 165.2); Amax= 247mp (log€ = 3.89);222mp (log E = 4.38) [3]) is obtained in 79 % yield.
Synthesis of Polyfunctionalized Thiophenes and Enediynes via Ring-Opening Reactions of 3-Lithiated Thieno[2,3-b](and [3,2b])thiophenes , 3,4-Dilithiated Thieno[2,3-b]thiophenes and3,6-Dilithiated Thieno[3,2-b]thiophenes. -Solutions of title lithiated thienothiophenes are obtained from the correspond
## Abstract Die aus Salzen von Dithiocarbonsäuren und Halogenessigsäurederivaten gebildeten Keten‐mercaptale lassen sich glatt zu 3‐Amino‐ und 3‐Hydroxy‐thiophenen cyclisieren; nochmaliger Ringschluß führt zu 3.4‐Diamino‐, 4‐Amino‐3‐hydroxy‐ und 3.4‐Dihydroxy‐thieno[2.3‐__b__]thiophenen. Über Reakt