反应详情

To a solution of 3-(4-chlorophenyl)-1H-naphtho-[2,1-b][1,4]thiazin-2(3H)-one (10.0 g) and 96% sodium hydroxide (1.96 g) in dimethylsulfoxide (150 ml) is added 1-bromo-3-chloropropane (6.78 g) under ice cooling, and the mixture is stirred at room temperature overnight. The reaction mixture is poured into water, and the mixture is extracted with ethyl acetate. The ethyl acetate layer is washed and distilled to remove the solvent. The residue is purified by silica gel column chromatography (eluent; n-hexane:ethyl acetate=5:1) and further is recrystallized from methanol to give 3-(4-chlorophenyl)-1-(3-chloropropyl)-1H-naphtho[2,1-b][1,4]thiazin-2(3-H)-one (8.04 g). M.p. 110°-112.5° C.

1. extractionthe mixture is extracted with ethyl acetate
2. washThe ethyl acetate layer is washed
3. distillationdistilled
4. customto remove the solvent
5. customThe residue is purified by silica gel column chromatography (eluent; n-hexane:ethyl acetate=5:1)
6. customfurther is recrystallized from methanol