Water → 3-Dibenzylamino-2,6-difluoro-benzoic acid benzyl ester

HRID 1843630

反応式

HRID 1843630 の反応式
[CH2:1]([N:8]([CH2:17][C:18]1[CH:23]=[CH:22][CH:21]=[CH:20][CH:19]=1)[C:9]1[CH:14]=[CH:13][C:12]([F:15])=[CH:11][C:10]=1[F:16])[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.C([Li])CCC.Cl[C:30]([O:32][CH2:33][C:34]1[CH:39]=[CH:38][CH:37]=[CH:36][CH:35]=1)=[O:31].O>C1COCC1>[CH2:33]([O:32][C:30](=[O:31])[C:11]1[C:12]([F:15])=[CH:13][CH:14]=[C:9]([N:8]([CH2:1][C:2]2[CH:3]=[CH:4][CH:5]=[CH:6][CH:7]=2)[CH2:17][C:18]2[CH:23]=[CH:22][CH:21]=[CH:20][CH:19]=2)[C:10]=1[F:16])[C:34]1[CH:39]=[CH:38][CH:37]=[CH:36][CH:35]=1

参加物

6

反応物 4

HCID 962WaterHCID 10387Benzyl chloroformateHCID 58086650Dibenzyl-(2,4-difluoro-phenyl)-amineHCID 178418339Butyllithium

生成物 1

HCID 584771183-Dibenzylamino-2,6-difluoro-benzoic acid benzyl ester

試薬・触媒・溶媒 1

HCID 8028Tetrahydrofuran溶媒2 回

反応条件

温度
-78 °C

実験手順

To a solution of dibenzyl-(2,4-difluoro-phenyl)-amine (17.5 g, 0.056 mol) in THF (140 mL), under nitrogen atmosphere, cooled at −78° C., n-butyllithium (1.6 M in hexane, 38 mL, 0.06 mol) was slowly added. The reaction was stirred for 1 hour, and then quickly added via a cannula to a solution of benzyl chloroformate (11.78 mL, 0.084 mol) in THF (140 mL) previously cooled at −78° C. The reaction was then allowed to warm to room temperature, poured into water and extracted with ethyl acetate. The organic layer was washed with brine, dried over anhydrous sodium sulfate and filtered. The filtrate was concentrated and purified by silica gel column chromatography eluting with 5% ethyl acetate in hexane grading to 10% acetate (quant.).

後処理

  1. temperatureto warm to room temperature
  2. extractionextracted with ethyl acetate
  3. washThe organic layer was washed with brine
  4. dry with materialdried over anhydrous sodium sulfate
  5. filtrationfiltered
  6. concentrationThe filtrate was concentrated
  7. custompurified by silica gel column chromatography
  8. washeluting with 5% ethyl acetate in hexane grading to 10% acetate (quant.)

出典と根拠

ORDレコード
ord-daf81abe12e84d59b9fffa28da969bab
出典データセット
uspto-grants-2015_02
特許番号
US08946250B2

関連ノート

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