Water → HCID 19608363、化合物

反応式

[CH2:1]([C:5]1[CH:10]=[C:9]([O:11][CH2:12][C:13]2[CH:18]=[CH:17][N:16]=[CH:15][CH:14]=2)[N:8]2[N:19]=[CH:20][CH:21]=[C:7]2[N:6]=1)[CH2:2][CH:3]=[CH2:4].C1C(=O)N([Br:29])C(=O)C1.O>C(COC)OC.O>[Br:29][C:21]1[CH:20]=[N:19][N:8]2[C:9]([O:11][CH2:12][C:13]3[CH:18]=[CH:17][N:16]=[CH:15][CH:14]=3)=[CH:10][C:5]([CH2:1][CH2:2][CH:3]=[CH2:4])=[N:6][C:7]=12

参加物

反応条件

温度: 0 °C

実験手順

5-(3-Butenyl)-7-(4-pyridylmethoxy)pyrazolo[1,5-a]pyrimidine (compound of Example 1), 500 mg, was dissolved in 10 ml of dimethoxyethane-water (3:1). The solution was cooled to 0° C. and 380 mg of NBS was added. The mixture was stirred at 0° C. for 1 hour and further stirred at room temperature for 1 hour. Water was added to the reaction mixture and the crystals precipitated were collected by filtration. The crude crystals were recrystallized from dichloromethane-n-hexane to provide 440 mg of the title compound as colorless crystals. The structure and melting point of the compound obtained are shown in Table 1.