反応 #1135846

反応方程式

Lithium aluminum hydride

5-iodo-N-methoxy-N-methyl-1-(tetrahydro-2H-pyran-2-yl)-1H-indazole-3-carboxamide

→

5-iodo-1-(tetrahydro-2H-pyran-2-yl)-1H-indazole-3-carbaldehyde

収率 90.0%

溶媒

THF

反応条件

後処理

1. 1
   その他was continued at 0° C. until the reaction
2. 2
   その他The reaction was quenched by the slow addition of EtOAc at 0° C.
3. 3
   workup.ADDITIONthe whole mixture was poured into 0.4 N NaHSO4
4. 4
   洗浄The organic layer was washed with brine
5. 5
   乾燥dried over MgSO4
6. 6
   濃縮concentrated
7. 7
   その他purified on a silica gel column (100% EtOAc→3:97 MeOH:DCM)

実験手順

Lithium aluminum hydride (160 mg, 4.21 mmol) was added in portions to a cooled (0° C.) solution of 5-iodo-N-methoxy-N-methyl-1-(tetrahydro-2H-pyran-2-yl)-1H-indazole-3-carboxamide (XI) (1.46 g, 3.5 mmol) in THF. Stirring was continued at 0° C. until the reaction was completed, approximately 30 min. The reaction was quenched by the slow addition of EtOAc at 0° C., and the whole mixture was poured into 0.4 N NaHSO4. The organic layer was washed with brine, dried over MgSO4, concentrated, and purified on a silica gel column (100% EtOAc→3:97 MeOH:DCM) to give 5-iodo-1-(tetrahydro-2H-pyran-2-yl)-1H-indazole-3-carbaldehyde (I) as a white solid (0.90 g, 3.15 mmol, 72% yield). 1H NMR (DMSO-d6) δ ppm 1.50-1.71 (m, 2H), 1.71-1.87 (m, 1H), 1.97-2.15 (m, 2H), 2.31-2.42 (m, 1H), 3.66-3.99 (m, 2H), 5.96-6.17 (m, 1H), 7.78 (d, J=6 Hz, 1H), 7.84 (d, J=6 Hz, 1H), 8.50 (s, 1H), 10.13 (s, 1H); ESIMS found for C13H13IN2O2 m/z 357 (M+H).

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