2,2-Difluoroethanamine → [3-(Tert-butyl-dimethyl-silanyloxymethyl)-4-chloro-benzyl]-(2,2-difluoro-ethyl)-amine

HRID 1715395ノート

反応式

HRID 1715395 の反応式
[F:1][CH:2]([F:5])[CH2:3][NH2:4].[C:6]([SiH2:10][O:11][C:12]([CH3:23])([CH3:22])[C:13]1[CH:14]=[C:15]([CH:18]=[CH:19][C:20]=1[Cl:21])[CH:16]=O)([CH3:9])([CH3:8])[CH3:7].[BH4-].[Na+]>CO>[C:6]([SiH2:10][O:11][C:12]([CH3:23])([CH3:22])[C:13]1[CH:14]=[C:15]([CH:18]=[CH:19][C:20]=1[Cl:21])[CH2:16][NH:4][CH2:3][CH:2]([F:5])[F:1])([CH3:9])([CH3:7])[CH3:8]

参加物

5

反応物 3

HCID 1362742,2-DifluoroethanamineHCID 4311764Sodium borohydrideHCID 1373299173-(tert-Butyl-dimethyl-silanyloxymethyl)-4-chloro-benzaldehyde

生成物 1

HCID 137329918[3-(Tert-butyl-dimethyl-silanyloxymethyl)-4-chloro-benzyl]-(2,2-difluoro-ethyl)-amine収率 100.9%

試薬・触媒・溶媒 1

HCID 887Methanol溶媒

実験手順

2,2-Difluoroethylamine (660 mg, 7.90 mmol) was added to a sol. of 3-(tert-butyl-dimethyl-silanyloxymethyl)-4-chloro-benzaldehyde (1.50 g, 5.27 mmol) in MeOH (53 mL). The mixture was heated to reflux for 4 h, and was allowed to cool down to rt. NaBH4 (300 mg, 7.90 mmol) was added carefully by portions, and the mixture was stirred for 1 h. The solvents were removed under reduced pressure, and the resulting oil was diluted with EtOAc. The mixture was washed with aq. sat. NaHCO3 and brine. The org. layer was dried over MgSO4, filtered, and the solvents were removed under reduced pressure to yield [3-(tert-butyl-dimethyl-silanyloxymethyl)-4-chloro-benzyl]-(2,2-difluoro-ethyl)-amine (1.86 g) as a clear crude oil that was used further directly. This crude material was dissolved in CH2Cl2 (53 mL), and DIPEA (2.7 mL, 15.6 mmol) was added, followed by Boc2O (1.70 g, 7.90 mmol). The mixture was stirred at rt for 1 h. The mixture was diluted with CH2Cl2 (50 mL), and washed with aq. 1M HCl, aq. sat. NaHCO3, and brine. The org. layer was dried over MgSO4, filtered, and the solvents were removed under reduced pressure. Purification of the crude by FC (EtOAc/heptane 5:95) yielded the title compound (2.27 g, 96%). LC-MS: tR=1.22 min.

後処理

  1. temperatureThe mixture was heated
  2. temperatureto reflux for 4 h
  3. customThe solvents were removed under reduced pressure
  4. additionthe resulting oil was diluted with EtOAc
  5. washThe mixture was washed with aq. sat. NaHCO3 and brine
  6. dry with materiallayer was dried over MgSO4
  7. filtrationfiltered
  8. customthe solvents were removed under reduced pressure

出典と根拠

ORDレコード
ord-3eac23d4eadd4f9da685f5b72e937b64
出典データセット
uspto-grants-2010_09
特許番号
US07799805B2

反応ノート

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