反应详情

Benzocyclobutenone (2.36 g, 0.02mol) was added slowly to a strongly stirred chlorosulfuric acid (3 mL) in chloroform (10 mL) solution. After the addition was done, the reaction mixture was stirred for 5 hours. Then the chloroform was evaporated, and the residue was precipitated in water yielding fine pink crystals. m.p. 80° C.; IR (KBr, cm−1): 1762; UV (λmax, methanol) 272 nm.

1. additionAfter the addition
2. customThen the chloroform was evaporated
3. customthe residue was precipitated in water yielding fine pink crystals