反应详情

2-Hydroxy-5-ethyl-4'-chlorobenzophenone (3 g), in acetic anhydride (10 ml) and acetic acid (1 ml) were refluxed for 3.5 hours, and allowed to cool. The mixture was poured into dilute NaOH solution and extracted with chloroform. The chloroform was washed with 10% NaHCO3 solution (50 ml), dried (MgSO4) and evaporated to leave an oil which was distilled, b.p. 160°-165° C. at 3.5 mm/Hg (2.3 g) to give the desired product.

1. temperatureto cool
2. extractionextracted with chloroform
3. washThe chloroform was washed with 10% NaHCO3 solution (50 ml)
4. dry with materialdried (MgSO4)
5. customevaporated
6. customto leave an oil which
7. distillationwas distilled