Cesium carbonate → 2-(6-fluoro-1-oxetan-3-yl-1H-indazol-3-yl)-5-(2-trimethylsilanyl-ethoxymethyl)-5H-pyrrolo[2,3-b]pyrazine-7-carbaldehyde

HRID 246074ノート

反応式

HRID 246074 の反応式
[F:1][C:2]1[CH:10]=[C:9]2[C:5]([C:6]([C:11]3[N:12]=[C:13]4[C:19]([CH:20]=[O:21])=[CH:18][N:17]([CH2:22][O:23][CH2:24][CH2:25][Si:26]([CH3:29])([CH3:28])[CH3:27])[C:14]4=[N:15][CH:16]=3)=[N:7][NH:8]2)=[CH:4][CH:3]=1.C(=O)([O-])[O-].[Cs+].[Cs+].I[CH:37]1[CH2:40][O:39][CH2:38]1>CN(C=O)C>[F:1][C:2]1[CH:10]=[C:9]2[C:5]([C:6]([C:11]3[N:12]=[C:13]4[C:19]([CH:20]=[O:21])=[CH:18][N:17]([CH2:22][O:23][CH2:24][CH2:25][Si:26]([CH3:29])([CH3:28])[CH3:27])[C:14]4=[N:15][CH:16]=3)=[N:7][N:8]2[CH:37]2[CH2:40][O:39][CH2:38]2)=[CH:4][CH:3]=1

参加物

5

反応物 3

HCID 10796Cesium carbonateHCID 133566863-IodooxetaneHCID 866779442-(6-fluoro-1H-indazol-3-yl)-5-(2-trimethylsilanylethoxymethyl)-5H-pyrrolo[2,3-b]pyrazine-7-carbaldehyde

生成物 1

HCID 866779432-(6-fluoro-1-oxetan-3-yl-1H-indazol-3-yl)-5-(2-trimethylsilanyl-ethoxymethyl)-5H-pyrrolo[2,3-b]pyrazine-7-carbaldehyde収率 86.4%

試薬・触媒・溶媒 1

HCID 6228Dimethylformamide溶媒

反応条件

温度
100 °C

実験手順

In a microwave vial 2-(6-fluoro-1H-indazol-3-yl)-5-(2-trimethylsilanyl-ethoxymethyl)-5H-pyrrolo[2,3-b]pyrazine-7-carbaldehyde (300 mg, 0.73 mmol) was dissolved in DMF (5 ml) and cesium carbonate (714 mg, 2.19 mmol) and 3-iodooxetane (200 mg, 1.08 mmol) were added. The vial was sealed and heated at 100° C. under microwave irradiation for 2 h. The reaction was cooled, quenched with water and extracted with EtOAc (2×). The combined organics were washed with sat LiCl and brine then dried over MgSO4 and concentrated. The crude residue was purified by silica gel chromatography with 20% to 100% EtOAc/heptane to provide 295 mg (86%) of 2-(6-fluoro-1-oxetan-3-yl-1H-indazol-3-yl)-5-(2-trimethylsilanyl-ethoxymethyl)-5H-pyrrolo[2,3-b]pyrazine-7-carbaldehyde as a white solid. 1H NMR (CDCl3, 300 MHz): δ (ppm) 10.48 (s, 1H), 9.40 (s, 1H), 8.86 (dd, J=9.1, 5.3 Hz, 1H), 8.31 (s, 1H), 7.11-7.25 (m, 2H), 5.72-5.86 (m, 3H), 5.41 (t, J=6.6 Hz, 2H), 5.20 (t, J=7.4 Hz, 2H), 3.56-3.70 (m, 2H), 0.85-1.06 (m, 2H), −0.02 (s, 9H).

後処理

  1. customThe vial was sealed
  2. temperatureThe reaction was cooled
  3. customquenched with water
  4. extractionextracted with EtOAc (2×)
  5. washThe combined organics were washed with sat LiCl and brine
  6. dry with materialthen dried over MgSO4
  7. concentrationconcentrated
  8. customThe crude residue was purified by silica gel chromatography with 20% to 100% EtOAc/heptane

出典と根拠

ORDレコード
ord-ca819179d27f4ac4b59a1dcc0a92f6e0
出典データセット
uspto-grants-2014_02
特許番号
US08658646B2

反応ノート

読み込み中…