反应详情

温度

90 °C

Malonic acid (7.80 g, 74.92 mmol) was added to a solution of the crude methanesulfonic acid 4-formylphenyl ester (10 g, 49.95 mmol), which was synthesized in the preceeding step, and piperidine (0.7 ml, 7.09 mmol) in pyridine (50 ml). The reaction mixture was heated to 90° C. for 2.5 h. It was cooled to room temperature. Concentrated hydrochloric acid/ice (400 ml/100 ml) was added. The precipitation was filtered off and washed with a 10% aqueous solution of acetic acid (200 ml). It was dried in vacuo to give 6.95 g of (E)-3-(4-(methanesulfonyloxy)phenyl)acrylic acid.

1. temperatureIt was cooled to room temperature
2. customThe precipitation
3. filtrationwas filtered off
4. washwashed with a 10% aqueous solution of acetic acid (200 ml)
5. customIt was dried in vacuo