Tetrahedron p. 11533 - 11540 (1994)
Update date:2022-08-16
Topics:
Peeters, Luc D.
Jacobs, Sven G.
Eevers, Walter
Geise, Herman J.
3-Methoxy-2,5-dimethylthiophene and 3,4-dimethoxy-2,5-dimethylthiophene have been prepared from 3,4-dibromo-2,5-dimethylthiophene 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 refluxing in DMF at 125 deg C for 4 hours.The mixture is easily separated by flash chromatography.
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(2015)Doi:10.1002/jlcr.3559
(2017)Doi:10.1016/S0022-328X(99)00748-2
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