反应详情

A solution of 3-benzoyloxy-4-methoxybenzoic acid (29.3 g; that is prepared as described in Reference Example 9) in toluene (300 mL) is treated with thionyl chloride (30 mL) and heated on the steam bath for 6 hours. It is then cooled, filtered and concentrated, to give 3-benzoyloxy-4-methoxybenzoyl chloride (28.7 g), m.p. 120°-122° C.

1. customthat is prepared
2. temperatureheated on the steam bath for 6 hours
3. temperatureIt is then cooled
4. filtrationfiltered
5. concentrationconcentrated