反应详情

11.5 g (0.1 mol) of methanesulfonyl chloride are added dropwise, at a reaction temperature of 0-5° C., to a mixture of 21.3 g (0.05 mol) of 2,2-bis-(4-hydroxy-3-nitrophenyl)-hexafluoropropane and 100 ml of pyridine. Stirring is continued for 1 hour at 5° C. and overnight at room temperature. The reaction mixture is then acidified, first with dilute hydrochloric and then with half-concentrated hydrochloric acid; the precipitate which is deposited is filtered off with suction and washed with water until neutral. The crude product (29.3 g) is then recrystallized from toluene, resulting in 24.8 g of analytically pure 2,2-bis-(4-mesyloxy-3-nitrophenyl)-hexafluoropropane to be isolated. Yield 85%; m.p. 119-121° C.

1. additionfirst with dilute hydrochloric
2. filtrationthe precipitate which is deposited is filtered off with suction
3. washwashed with water until neutral
4. customThe crude product (29.3 g) is then recrystallized from toluene