4-Bromothiophene-2-carbaldehyde → 3-(4-Bromo-thiophen-2-yl)-acrylic acid methyl ester

Participants

Reaction Steps

4-Bromo-thiophene-2-carbaldehyde (44 g, 0.23 mol) and [Bis-(2,2,2-trifluoro-ethoxy)-phosphoryl]-acetic methyl ester (80.6 g, 0.253 mol) were treated by the method outlined in Example 34, step a) to afford the subtitle compound that was purified by column chromatography (SiO2) using a 0-60% ethylacetate-hexane gradient (46.22 g, yield: 78%). MS calculated for C8H7BrO2S+H: 247, observed: 247 249.

Provenance & Evidence