Sodium Hydroxide → ((7-Chloro-3-(2-fluorophenyl)-1,2-benzisoxazol-6-yl)oxy)acetic acid
反応式
C([O:3][C:4](=[O:24])[CH2:5][O:6][C:7]1[CH:22]=[CH:21][C:10]2[C:11]([C:14]3[CH:19]=[CH:18][CH:17]=[CH:16][C:15]=3[F:20])=[N:12][O:13][C:9]=2[C:8]=1[Cl:23])C.[OH-].[Na+]>C(O)C>[Cl:23][C:8]1[C:9]2[O:13][N:12]=[C:11]([C:14]3[CH:19]=[CH:18][CH:17]=[CH:16][C:15]=3[F:20])[C:10]=2[CH:21]=[CH:22][C:7]=1[O:6][CH2:5][C:4]([OH:24])=[O:3]参加物
4
実験手順
A mixture of 10.0 g of ethyl{[7-chloro-3-(2-fluorophenyl)-1,2-benzisoxazol-6-yl]oxy}acetate, 100 ml of 10% sodium hydroxide, and 350 ml of ethyl alcohol is refluxed for 3.5 hours. Thereafter, the ethyl alcohol is removed under vacuum and the residue is acidified with a 5% hydrochloric acid solution effecting a solid precipitate. The precipitate is collected by filtration and dried. The dried product is recrystallized from 95% ethyl alcohol to yield the product {[7-chloro-3-(2-fluorophenyl)-1,2-benzisoxazol-6-yl]oxy}acetic acid having a melting point of 190° to 191° C.