Triethylamine → (2S,4R)-4-tert-butoxy-2-(2,2-dimethoxy-ethylcarbamoyl)-pyrrolidine-1-carboxylic acid benzyl ester

HRID 1527910Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 1527910
[CH2:1]([O:8][C:9]([N:11]1[CH2:15][C@H:14]([O:16][C:17]([CH3:20])([CH3:19])[CH3:18])[CH2:13][C@H:12]1[C:21](O)=[O:22])=[O:10])[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.[CH3:24][O:25][CH:26]([O:29][CH3:30])[CH2:27][NH2:28].CCN=C=NCCCN(C)C.Cl.C1C=CC2N(O)N=NC=2C=1.C(N(CC)CC)C>ClCCl.O>[CH2:1]([O:8][C:9]([N:11]1[CH2:15][C@H:14]([O:16][C:17]([CH3:19])([CH3:20])[CH3:18])[CH2:13][C@H:12]1[C:21](=[O:22])[NH:28][CH2:27][CH:26]([O:29][CH3:30])[O:25][CH3:24])=[O:10])[C:2]1[CH:3]=[CH:4][CH:5]=[CH:6][CH:7]=1

Komponenten

8

Edukt 5

HCID 8471TriethylamineHCID 757711-HydroxybenzotriazoleHCID 89728Aminoacetaldehyde dimethyl acetalHCID 27239391,3-Propanediamine, N'-(ethylcarbonimidoyl)-N,N-dimethyl-, monohydrochlorideHCID 6950951Z-Hyp(Tbu)-OH

Produkt 1

HCID 59548508(2S,4R)-4-tert-butoxy-2-(2,2-dimethoxy-ethylcarbamoyl)-pyrrolidine-1-carboxylic acid benzyl esterAusbeute 31,6 %

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 962WaterLösungsmittelHCID 6344DichloromethaneLösungsmittel

Versuchsvorschrift

To a stirred solution of (2S,4R)-4-tert-butoxy-pyrrolidine-1,2-dicarboxylic acid 1-benzyl ester (500 mg, 1.56 mmol) and 2,2-dimethoxy-ethylamine (163 mg, 1.56 mmol) in dichloromethane (5 mL) were added EDC-HCl (298 mg, 1.56 mmol), HOBt (210 mg, 1.56 mmol) and triethylamine (157 mg, 1.56 mmol). The mixture was stirred at room temp. for 24 h, diluted with water, extracted with ethyl acetate and washed with water and brine. The organic layer was dried over anhydrous sodium sulfate, filtered, concentrated and purified by column chromatography (using 15% EtOAc in hexane as eluent) to give (2S,4R)-4-tert-butoxy-2-(2,2-dimethoxy-ethylcarbamoyl)-pyrrolidine-1-carboxylic acid benzyl ester (200 mg, 31.6% yield) as a light brown liquid. MS calcd. for C21H33N2O6 [(M+H)+] 409.0, obsd. 409.0.

Aufarbeitung

  1. extractionextracted with ethyl acetate
  2. washwashed with water and brine
  3. dry with materialThe organic layer was dried over anhydrous sodium sulfate
  4. filtrationfiltered
  5. concentrationconcentrated
  6. custompurified by column chromatography (using 15% EtOAc in hexane as eluent)

Quellen und Nachweise

ORD-Eintrag
ord-b54e2de099f14e7899aa2d6332189d2d
Quelldatensatz
uspto-grants-2015_07
Patentnummer
US09090559B2

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