Ammonium Chloride → (3R*,4S*)-6-methoxy-2,2-dimethyl-7-nitro-4-[(2-phenylethyl)amino]-3,4-dihydro-2H-1-benzopyran-3-ol
反応式
[O:1]1[C@@H:7]2[C@@H:2]1[C:3]([CH3:18])([CH3:17])[O:4][C:5]1[CH:11]=[C:10]([N+:12]([O-:14])=[O:13])[C:9]([O:15][CH3:16])=[CH:8][C:6]=12.Cl([O-])(=O)(=O)=O.[Li+].[Cl-].[NH4+:26]>O1CCOCC1>[CH3:16][O:15][C:9]1[C:10]([N+:12]([O-:14])=[O:13])=[CH:11][C:5]2[O:4][C:3]([CH3:18])([CH3:17])[C@H:2]([OH:1])[C@@H:7]([NH:26][CH2:2][CH2:7][C:6]3[CH:8]=[CH:9][CH:10]=[CH:11][CH:5]=3)[C:6]=2[CH:8]=1参加物
反応物 3
生成物 1
試薬・触媒・溶媒 1
反応条件
- 温度
- 80 °C
実験手順
To a solution of (3R*,4S*)-3,4-epoxy-6-methoxy-2,2-dimethyl-7-nitro-3,4-dihydro-2H-1-benzopyran (2.50 g, 9.95 mmol) in 1,4-dioxane(5.0 mL), lithium perchlorate (1.06 g, 9.95 mmol) and 4-(phenylethyl)amine (1.50 mL, 11.9 mmol) were added at room temperature and the mixture was stirred at 80° C. for 1 hour. Upon the completion of the reaction, an aqeuous solution of saturated ammonium chloride was added to the reaction solution, and the resulting solution was extracted with ethyl acetate. The organic phase was washed with saturated sodium chloride solution, and then dried over anhydrous sodium sulfate. After distilling off the solvent, the residue was purified by column chromatography (hexane/ethyl acetate=6/4) and the aimed product was obtained as yellow amorphous substance (quantitative yield).
後処理
- customUpon the completion of the reaction
- extractionthe resulting solution was extracted with ethyl acetate
- washThe organic phase was washed with saturated sodium chloride solution
- dry with materialdried over anhydrous sodium sulfate
- distillationAfter distilling off the solvent
- customthe residue was purified by column chromatography (hexane/ethyl acetate=6/4)
出典と根拠
- ORDレコード
- ord-1a1479599cf2447f9a9d347455789c0e
- 出典データセット
- uspto-grants-2010_01
- 特許番号
- US07652008B2
反応ノート
読み込み中…