Hydrochloric Acid → 3(2H)-Pyridazinone, 6-(2-phenylpyrazolo[1,5-a]pyridin-3-yl)-

反応式

C1(S([C:10]2[N:11]=[N:12][C:13]([C:16]3[C:17]([C:25]4[CH:30]=[CH:29][CH:28]=[CH:27][CH:26]=4)=[N:18][N:19]4[CH:24]=[CH:23][CH:22]=[CH:21][C:20]=34)=[CH:14][CH:15]=2)(=O)=O)C=CC=CC=1.[OH-:31].[Na+].Cl>O1CCOCC1>[O:31]=[C:10]1[CH:15]=[CH:14][C:13]([C:16]2[C:17]([C:25]3[CH:30]=[CH:29][CH:28]=[CH:27][CH:26]=3)=[N:18][N:19]3[CH:24]=[CH:23][CH:22]=[CH:21][C:20]=23)=[N:12][NH:11]1

参加物

実験手順

A mixture of 3-(3-phenylsulfonylpyridazin-6-yl)-2-phenylpyrazolo[1,5-a]pyridine (20.0 g), sodium hydroxide solution (80 ml; containing 7.8 g of sodium hydroxide), and 1,4-dioxane (40 ml) was stirred for 2 hours under reflux. After being cooled to room temperature, the reaction mixture was acidified with 36% hydrochloric acid (15 ml). The precipitate formed was collected, washed with three 25 ml portions of water, and dried to give 3-(3-oxo-2,3-dihydropyridazin-6-yl)-2-phenylpyrazolo[ 1,5-a]pyridine (16.0 g). An analytical sample was prepared by recrystallization from ethyl acetate.