Hydrochloric Acid → (2S,4R)-tert-butyl 4-(benzyloxy)-2-(hydroxymethyl)pyrrolidine-1-carboxylate

HRID 1454250ノート

反応式

HRID 1454250 の反応式
[C:1]([O:5][C:6]([N:8]1[CH2:12][CH:11]([O:13][CH2:14][C:15]2[CH:20]=[CH:19][CH:18]=[CH:17][CH:16]=2)[CH2:10][CH:9]1[C:21](O)=[O:22])=[O:7])([CH3:4])([CH3:3])[CH3:2].Cl.CCCCCC.C(OCC)(=O)C>C1COCC1>[C:1]([O:5][C:6]([N:8]1[CH2:12][CH:11]([O:13][CH2:14][C:15]2[CH:16]=[CH:17][CH:18]=[CH:19][CH:20]=2)[CH2:10][CH:9]1[CH2:21][OH:22])=[O:7])([CH3:4])([CH3:3])[CH3:2]

参加物

5

反応物 3

HCID 313Hydrochloric AcidHCID 41798284-(Benzyloxy)-1-(tert-butoxycarbonyl)pyrrolidine-2-carboxylic acidHCID 21226206Ethyl acetate hexane

生成物 1

HCID 14821718(2S,4R)-tert-butyl 4-(benzyloxy)-2-(hydroxymethyl)pyrrolidine-1-carboxylate

試薬・触媒・溶媒 1

HCID 8028Tetrahydrofuran溶媒2 回

実験手順

The 4-benzyloxy-pyrrolidine-1,2-dicarboxylic acid 1-t-butyl ester (1.00 g, 3.11 mmol) was taken up in anhydrous THF under argon and cooled to 0EC. BH3, THF (1.0 M, 6.22 mmol, 6.22 mL) was added to the solution dropwise over 10 min. The reaction mixture was then allowed to stir at 0EC for 30 min then warmed to room temp and stirred for an additional 30 min. The reaction was slowly poured into a 1N HCl solution and the aqueous layer was extracted three times with ethyl acetate. The combined organic layers were washed with water and brine then dried over MgSO4. The solution was filtered and the solvent removed under reduced pressure. The product was isolated by flash chromatography. (1:1 hexane-ethyl acetate) Yield 814 mg. 1H NMR (CDCl3, 300 MHz) δ 1.48 (s, 9H), 1.63-1.76 (m, 1H), 2.10-2.26 (m, 1H), 3.33 (m, 1H), 3.50-3.60 (m, 1H), 3.63-3.75 (m, 2H), 4.05-4.19 (m, 2H), 4.49 (s, 2H), 7.23-7.39 (m, 5H).

後処理

  1. temperaturecooled to 0EC
  2. stirringstirred for an additional 30 min
  3. extractionthe aqueous layer was extracted three times with ethyl acetate
  4. washThe combined organic layers were washed with water and brine
  5. dry with materialthen dried over MgSO4
  6. filtrationThe solution was filtered
  7. customthe solvent removed under reduced pressure
  8. customThe product was isolated by flash chromatography

出典と根拠

ORDレコード
ord-9caba5313f044b2db5df57811edd29d0
出典データセット
uspto-grants-2009_01
特許番号
US07479495B2

反応ノート

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