Ethyl Acetate → trans-Tert-butyl 3-(((benzyloxy)carbonyl)amino)-4-hydroxypyrrolidine-1-carboxylate

HRID 338960ノート

反応式

HRID 338960 の反応式
[NH2:1][C@H:2]1[C@H:6]([OH:7])[CH2:5][N:4]([C:8]([O:10][C:11]([CH3:14])([CH3:13])[CH3:12])=[O:9])[CH2:3]1.C([O-])([O-])=O.[Na+].[Na+].[CH:21]1[CH:26]=[CH:25][C:24]([CH2:27][O:28][C:29](Cl)=[O:30])=[CH:23][CH:22]=1.C(OCC)(=O)C>O1CCOCC1.O>[CH2:27]([O:28][C:29]([NH:1][C@H:2]1[C@H:6]([OH:7])[CH2:5][N:4]([C:8]([O:10][C:11]([CH3:14])([CH3:13])[CH3:12])=[O:9])[CH2:3]1)=[O:30])[C:24]1[CH:25]=[CH:26][CH:21]=[CH:22][CH:23]=1

参加物

7

反応物 4

HCID 8857Ethyl AcetateHCID 10340Sodium CarbonateHCID 10387Benzyl chloroformateHCID 11275699(3R,4R)-3-Amino-1-Boc-4-hydroxypyrrolidine

生成物 1

HCID 57970124trans-Tert-butyl 3-(((benzyloxy)carbonyl)amino)-4-hydroxypyrrolidine-1-carboxylate収率 67.1%

試薬・触媒・溶媒 2

HCID 962Water溶媒HCID 312751,4-Dioxane溶媒

実験手順

To a solution of (3R,4R)-tert-butyl 3-amino-4-hydroxypyrrolidine-1-carboxylate (4.40 g, 21.76 mmol) and Na2CO3 (2.77 g, 26.11 mmol) in dioxane (50 mL) and water (50 mL) was added Cbz-Cl (3.87 mL, 26.11 mmol) at 0° C. The reaction mixture was warmed to ambient temperature and stirred at ambient temperature for 3 hours. Ethyl acetate (50 mL) was added. The organic layer was separated, washed with brine, dried (sodium sulfate), filtered and concentrated under reduced pressure. The residue was purified by flash chromatography on silica gel (5:1 hexane/ethyl acetate) to give (3R,4R)-tert-butyl 3-(benzyloxycarbonylamino)-4-hydroxypyrrolidine-1-carboxylate (4.91 g, 67.1%) as an oil.

後処理

  1. customThe organic layer was separated
  2. washwashed with brine
  3. dry with materialdried (sodium sulfate)
  4. filtrationfiltered
  5. concentrationconcentrated under reduced pressure
  6. customThe residue was purified by flash chromatography on silica gel (5:1 hexane/ethyl acetate)

出典と根拠

ORDレコード
ord-95344e44caf246cda2a2c633c2fadfdb
出典データセット
uspto-grants-2014_11
特許番号
US08889704B2

反応ノート

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