反应详情

To a suspension of 4-amino-3-hydroxybenzoic acid (7.66 g, 50.0 mmol) in THF (100 mL) was added pyridine (4.3 mL, 53.2 mmol, 1.06 eq) followed by benzoyl chloride (6.1 mL, 52.6 mmol, 1.05 eq) at 0° C. After 5 min, the reaction was quenched with H2O then extracted with CH2Cl2 (4×80 mL). Crude product precipitated out of organic layer then was collected by filtration to afford 4-benzamido-3-hydroxybenzoic acid (10.1 g, 39.3 mmol, 79%). The product was carried over to next step without further purification.

1. customthe reaction was quenched with H2O
2. extractionthen extracted with CH2Cl2 (4×80 mL)
3. customCrude product precipitated out of organic layer
4. filtrationthen was collected by filtration