反应详情

温度

100 °C

The product of Example 1 (2 g.) was mixed with polyphosphoric acid (10 g.) and heated at 100° C. for 30 minutes. Water was added and the mixture stirred and extracted with ether. The extract was dried, filtered and evaporated to give crude 2-(2-fluoro-4-biphenylyl)acrylic acid in a yield of 91%, m.p. 169°-172° C. This was recrystallised from a mixture of ether and light petroleum (b.p. 40°-60° C.) to give pure material, m.p. 176°-177° C.

1. extractionextracted with ether
2. customThe extract was dried
3. filtrationfiltered
4. customevaporated