反応式
[CH3:1][O:2][C:3](=[O:25])[C:4]([N:22]=[N+]=[N-])=[CH:5][C:6]1[CH:11]=[CH:10][C:9]([O:12][CH2:13][C:14]2[CH:19]=[CH:18][CH:17]=[CH:16][CH:15]=2)=[C:8]([O:20][CH3:21])[CH:7]=1>C1(C)C(C)=CC=CC=1>[CH3:1][O:2][C:3]([C:4]1[NH:22][C:11]2[C:6]([CH:5]=1)=[CH:7][C:8]([O:20][CH3:21])=[C:9]([O:12][CH2:13][C:14]1[CH:19]=[CH:18][CH:17]=[CH:16][CH:15]=1)[CH:10]=2)=[O:25]参加物
実験手順
A solution of the azidocinnamate (55) (12.2 g, 36.0 mmol) prepared as described in example 247 in xylene (300 mL) was added dropwise to refluxing xylene (100 mL) over 1.5 h, the reaction mixture was heated at reflux for a further 15 min and then most of the xylene was removed by distillation. The residue, on cooling to room temperature, formed a fine cream precipitate of methyl-6-(benzyloxy)-5-methoxyindole-2-carboxylate which was collected by filtration. The remaining xylene was removed from the mother liquor azeotropically with ethanol, the residue was recrystallized from ethanol to give further methyl-6-(benzyloxy)-5-methoxyindole-2-carboxylate. The mother liquor was again concentrated and the residue recrystallized. The methyl-6-(benzyloxy)-5-methoxyindole-2-carboxylate (56) (9.9 g total, 88%) was used in the next step without purification. Found: C, 69.38; H, 5.54; N, 4.55. C18H17NO4 requires: C, 69.44; H, 5.50; N, 4.50.
後処理
- additionwas added dropwise
- temperaturethe reaction mixture was heated
- temperatureat reflux for a further 15 min
- custommost of the xylene was removed by distillation
出典と根拠
- ORDレコード
- ord-5b03fb00651042f0af60dea939965173
- 出典データセット
- uspto-grants-2006_08
- 特許番号
- US07094798B1
関連ノート
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