[reaction: see text] 1-Chloro-1-fluoro-2-methoxy-2-methylcyclopropane eliminates HCl on heating in quinoline solution above 50 degrees C to give 2-fluoro-3-methoxy-1,3-butadiene in high yield. If an alcohol is added to the reaction then a 2-fluoro-3-alkoxy-1,3-butadiene is obtained in high yield. The dienes give smooth 4 + 2 cycloaddition reactions.

This method provides a convenient preparation of 2-fluoro-3-alkoxy-1,3-butadienes in high yield, with smooth 4 + 2 cycloaddition reactions.

Paper

A convenient preparation of 2-fluoro-3-alkoxy-1,3-butadienes.

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Citations