反応式
[F:1][C:2]([F:8])([F:7])[C:3]([NH2:6])([CH3:5])[CH3:4].Cl[C:10]([O:12][C:13]1[CH:18]=[CH:17][C:16]([N+:19]([O-:21])=[O:20])=[CH:15][CH:14]=1)=[O:11].C(N(C(C)C)CC)(C)C.C(=O)([O-])O.[Na+]>ClCCl>[F:1][C:2]([F:8])([F:7])[C:3]([NH:6][C:10](=[O:11])[O:12][C:13]1[CH:14]=[CH:15][C:16]([N+:19]([O-:21])=[O:20])=[CH:17][CH:18]=1)([CH3:5])[CH3:4]参加物
反応条件
- 温度
- -15 °C
実験手順
To a solution of 0.35 g (2.75 mmol) of 1,1,1-trifluoro-2-methylpropan-2-ylamine (CAS 812-18-0) in 20 ml of dichloromethane, cooled to −15° C., is added dropwise 1.00 g (4.96 mmol) of 4-nitrophenyl chloroformate (CAS 7693-46-1) dissolved in 15 ml of dichloromethane, while maintaining the temperature at −15° C. 0.48 ml (2.75 mmol) of diisopropylethylamine in 10 ml of dichloromethane is then added, still at −15° C. Stirring is continued at −15° C. for 2 hours, and the temperature of the mixture is then allowed to return to 0° C. over 1 hour. 20 ml of saturated aqueous sodium hydrogen carbonate solution are then added. The organic phase is separated out by settling and dried over sodium sulfate, and the solvent is partially evaporated off under reduced pressure to a volume of about 8 ml. This solution is chromatographed on a column of 40 g of silica gel, eluting with a mixture of 20% cyclohexane in dichloromethane, to give 0.21 g of 4-nitrophenyl 1,1,1-trifluoro-2-methylpropan-2-ylcarbamate in the form of a white solid.
後処理
- waitto return to 0° C. over 1 hour
- customThe organic phase is separated out
- dry with materialdried over sodium sulfate
- customthe solvent is partially evaporated off under reduced pressure to a volume of about 8 ml
- customThis solution is chromatographed on a column of 40 g of silica gel
- washeluting with a mixture of 20% cyclohexane in dichloromethane
出典と根拠
- ORDレコード
- ord-fc3b6c7a4e284c7db39ca0f8a09d666f
- 出典データセット
- uspto-grants-2016_01
- 特許番号
- US09233965B2
関連ノート
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