Acetic Acid → {2-[4-(4-tert-Butoxycarbonylaminobutyl)phenoxy]ethylamino}acetic acid ethyl ester

HRID 1890807ノート

反応式

HRID 1890807 の反応式
[C:1]([OH:4])(=[O:3])[CH3:2].[C:5]([O:9][C:10](=[O:26])[NH:11][CH2:12][CH2:13][CH2:14][CH2:15][C:16]1[CH:21]=[CH:20][C:19]([O:22][CH2:23][CH2:24][NH2:25])=[CH:18][CH:17]=1)([CH3:8])([CH3:7])[CH3:6].C([BH3-])#N.[Na+].O1CC[CH2:33][CH2:32]1>O>[CH2:32]([O:3][C:1](=[O:4])[CH2:2][NH:25][CH2:24][CH2:23][O:22][C:19]1[CH:18]=[CH:17][C:16]([CH2:15][CH2:14][CH2:13][CH2:12][NH:11][C:10]([O:9][C:5]([CH3:8])([CH3:6])[CH3:7])=[O:26])=[CH:21][CH:20]=1)[CH3:33]

参加物

6

反応物 4

HCID 176Acetic AcidHCID 8028TetrahydrofuranHCID 5003444Sodium cyanoborohydrideHCID 588097964-[4-(2-Aminoethoxy)phenyl]-butylcarbamic acid tert-butyl ester

生成物 1

HCID 58809798{2-[4-(4-tert-Butoxycarbonylaminobutyl)phenoxy]ethylamino}acetic acid ethyl ester収率 38%

試薬・触媒・溶媒 1

HCID 962Water溶媒

実験手順

Dimethylacetone dicarboxylate (1.43 mL, 9.69 mmol) and glacial acetic acid (0.56 mL, 9.70 mmol) were added sequentially to a solution of {4-[4-(2-aminoethoxy)phenyl]-butylcarbamic acid tert-butyl ester (1) (1.0 g, 3.24 mmol) in tetrahydrofuran (20 mL). The reaction was stirred for 2 hours at ambient temperature, then cooled to −30° C. Sodium cyanoborohydride (0.61 g, 9.70 mmol) was added in three portions and the reaction slowly warmed to room temperature over 12 hours. After this time, the reaction was quenched by the addition of water (5 mL). The volatiles was then removed under vacuum to give an oil. This oil was diluted with water (10 mL) and extracted with ethyl acetate (3×10 mL). The combined organics were washed with water (3×10 mL) and then brine (3×10 mL), dried over anhydrous sodium sulfate and concentrated to give 2 (0.576 g, 38% yield) as a clear oil: 1H NMR (500 MHz, CDCl3) δ 1.44 (s, 9H), 1.46-1.52 (m, 2H), 1.55-1.64 (m, 2H), 2.56-2.58 (m, 4H), 2.64-2.65 (m, 2H), 2.72-2.79 (m, 2H), 2.88-2.93 (m, 2H), 3.74 (d, 6H), 3.88-3.93 (m, 1H), 4.44-4.49 (m, 2H), 6.40 (br, 1H), 6.85 (d, 2H), 7.09 (d, 2H); m/z (ESI) 467.

後処理

  1. temperaturecooled to −30° C
  2. customthe reaction
  3. temperatureslowly warmed to room temperature over 12 hours
  4. customAfter this time, the reaction was quenched by the addition of water (5 mL)
  5. customThe volatiles was then removed under vacuum
  6. customto give an oil
  7. extractionextracted with ethyl acetate (3×10 mL)
  8. washThe combined organics were washed with water (3×10 mL)
  9. dry with materialbrine (3×10 mL), dried over anhydrous sodium sulfate
  10. concentrationconcentrated

出典と根拠

ORDレコード
ord-d6a2f59a9ba44ea2a79ed21bdafdedb4
出典データセット
uspto-grants-2013_08
特許番号
US08507497B2

反応ノート

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