8-chloro-11-(1-methyl-4-piperidinyl)-11H-benzo[5,6]cyclohepta[1,2-b]pyridin-11-ol → 5,6-Dehydro-N-methyl Desloratadine
反応式
[Cl:1][C:2]1[CH:3]=[CH:4][C:5]2[C:15]([CH:17]3[CH2:22][CH2:21][N:20]([CH3:23])[CH2:19][CH2:18]3)(O)[C:10]3=[N:11][CH:12]=[CH:13][CH:14]=[C:9]3[CH:8]=[CH:7][C:6]=2[CH:24]=1>S(=O)(=O)(O)O.FC(F)(F)S(O)(=O)=O>[Cl:1][C:2]1[CH:3]=[CH:4][C:5]2[C:15](=[C:17]3[CH2:18][CH2:19][N:20]([CH3:23])[CH2:21][CH2:22]3)[C:10]3=[N:11][CH:12]=[CH:13][CH:14]=[C:9]3[CH:8]=[CH:7][C:6]=2[CH:24]=1参加物
4
反応条件
- 温度
- 70 °C
実験手順
A mixture of 847 mg (2.48 mmole) of 8-chloro-11-(1-methyl-4-piperidinyl)-11H-benzo[5,6]cyclohepta[1,2-b]pyridin-11-ol in 5 mL of concentrated sulfuric acid and 5 mL of trifluoromethane sulfonic acid was heated at 70° C. for 4 hr 10 min. The mixture was cooled to room temperature, poured into ice cold 30% aqueous KOH, and extracted three times with CH2Cl2The organic portions were combined, washed once with water, dried over MgSO4, filtered, and concentrated in vacuo to yield 755 mg (94%) of the title compound as a glass.