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Copper (I) catalysed formation of 3-Methoxy-2,5-dimethylthiophene and 3,4-dimethoxy-2,5-dimethylthiophene

✍ Scribed by Luc D. Peeters; Sven G. Jacobs; Walter Eevers; Herman J. Geise

Publisher: Elsevier Science
Year: 1994
Tongue: French
Weight: 439 KB
Volume: 50
Category: Article
ISSN: 0040-4020
DOI: 10.1016/s0040-4020(01)89290-5

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✦ Synopsis

3-Methoxy-2,Giimethylthiophene and 3,4diiethoxy-2,5dimethylthiophene have been prepared from 3,4-dibromo-2,5dimethylthiophene and sodium methoxide using Cu(I)Br as a catalyst. The influence of some cosolvents and reaction temperature is investigated. Best results are obtained by refloxing in DMF at 125°C for 4 hours. The mixtore is easily separated by flash chromatography.

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