Methanol → (2S,4R)-1-((2S,3R)-2-((tert-butoxycarbonyl)amino)-3,5-dimethylnon-8-enoyl)-4-hydroxypyrrolidine-2-carboxylic acid

HRID 1852118

Reaktionsgleichung

Reaktionsgleichung von HRID 1852118
[C:1]([O:5][C:6]([NH:8][C@@H:9]([C@H:22]([CH3:30])[CH2:23][CH:24]([CH3:29])[CH2:25][CH2:26][CH:27]=[CH2:28])[C:10]([N:12]1[CH2:16][C@H:15]([OH:17])[CH2:14][C@H:13]1[C:18]([O:20]C)=[O:19])=[O:11])=[O:7])([CH3:4])([CH3:3])[CH3:2].CO.[Li+].[OH-]>C1COCC1.O>[C:1]([O:5][C:6]([NH:8][C@@H:9]([C@H:22]([CH3:30])[CH2:23][CH:24]([CH3:29])[CH2:25][CH2:26][CH:27]=[CH2:28])[C:10]([N:12]1[CH2:16][C@H:15]([OH:17])[CH2:14][C@H:13]1[C:18]([OH:20])=[O:19])=[O:11])=[O:7])([CH3:4])([CH3:3])[CH3:2]

Komponenten

6

Edukt 3

HCID 887MethanolHCID 3939Lithium HydroxideHCID 86683197HCID 86683197, Verbindung

Produkt 1

HCID 86683196(2S,4R)-1-((2S,3R)-2-((tert-butoxycarbonyl)amino)-3,5-dimethylnon-8-enoyl)-4-hydroxypyrrolidine-2-carboxylic acidAusbeute 115 %

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 962WaterLösungsmittelHCID 8028TetrahydrofuranLösungsmittel

Versuchsvorschrift

(2S,4R)-methyl 1-((2S,3R)-2-((tert-butoxycarbonyl)amino)-3,5-dimethylnon-8-enoyl)-4-hydroxypyrrolidine-2-carboxylate (10.8 g, 25.3 mmol) was dissolved in THF (50 mL), MeOH (50 mL) and to this solution was added LiOH (2.425 g, 101 mmol) in Water (50.0 mL). The reaction mixture was stirred at rt for 16 h. The solvent was removed under vacuum and the resulting aqueous residue was diluted with water, and EtOAc. The mixture was neutralised with 1 N HCl and adjusted the pH ˜2.5 and the mixture was extracted with EtOAc. The organic layer was collected, washed with brine, dried over Na2SO4, and concentrated to give (2S,4R)-1-((2S,3R)-2-((tert-butoxycarbonyl)amino)-3,5-dimethylnon-8-enoyl)-4-hydroxypyrrolidine-2-carboxylic acid (12 g, 29.1 mmol, 115% yield) as yellow viscous oil. MS: MS m/z 413.2 (M++1).

Aufarbeitung

  1. customThe solvent was removed under vacuum
  2. additionthe resulting aqueous residue was diluted with water, and EtOAc
  3. extractionthe mixture was extracted with EtOAc
  4. customThe organic layer was collected
  5. washwashed with brine
  6. dry with materialdried over Na2SO4
  7. concentrationconcentrated

Quellen und Nachweise

ORD-Eintrag
ord-078c31a7b5d6441486a4a9d39565d6b9
Quelldatensatz
uspto-grants-2015_02
Patentnummer
US08957203B2

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