Sodium triacetoxyborohydride → (3R,4R)-benzyl 3-(((R)-1-(5-benzyl-2-(2,5-difluorophenyl)thiazol-4-yl)-2,2-dimethylpropylamino)methyl)-4-fluoropyrrolidine-1-carboxylate

HRID 404840Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 404840
[CH2:1]([C:8]1[S:12][C:11]([C:13]2[CH:18]=[C:17]([F:19])[CH:16]=[CH:15][C:14]=2[F:20])=[N:10][C:9]=1[C@H:21]([NH2:26])[C:22]([CH3:25])([CH3:24])[CH3:23])[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.[BH-](OC(C)=O)(OC(C)=O)OC(C)=O.[Na+].[F:41][C@@H:42]1[C@H:46]([CH:47]=O)[CH2:45][N:44]([C:49]([O:51][CH2:52][C:53]2[CH:58]=[CH:57][CH:56]=[CH:55][CH:54]=2)=[O:50])[CH2:43]1>C(Cl)Cl>[CH2:1]([C:8]1[S:12][C:11]([C:13]2[CH:18]=[C:17]([F:19])[CH:16]=[CH:15][C:14]=2[F:20])=[N:10][C:9]=1[C@H:21]([NH:26][CH2:47][C@H:46]1[C@@H:42]([F:41])[CH2:43][N:44]([C:49]([O:51][CH2:52][C:53]2[CH:58]=[CH:57][CH:56]=[CH:55][CH:54]=2)=[O:50])[CH2:45]1)[C:22]([CH3:23])([CH3:25])[CH3:24])[C:2]1[CH:3]=[CH:4][CH:5]=[CH:6][CH:7]=1

Komponenten

5

Edukt 3

HCID 5049666Sodium triacetoxyborohydrideHCID 53482935(3R,4S)-benzyl 3-fluoro-4-formylpyrrolidine-1-carboxylateHCID 86693890HCID 86693890, Verbindung

Produkt 1

HCID 86693891(3R,4R)-benzyl 3-(((R)-1-(5-benzyl-2-(2,5-difluorophenyl)thiazol-4-yl)-2,2-dimethylpropylamino)methyl)-4-fluoropyrrolidine-1-carboxylateAusbeute 60 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 6344DichloromethaneLösungsmittel2×

Versuchsvorschrift

To a solution of (R)-1-(5-benzyl-2-(2,5-difluorophenyl)thiazol-4-yl)-2,2-dimethylpropan-1-amine (140 mg, 0.378 mmol) in CH2Cl2 (7.0 mL) was added NaBH(OAc)3 (400 mg, 1.89 mmol). To this solution, the crude (3R,4S)-benzyl 3-fluoro-4-formylpyrrolidine-1-carboxylate (obtained from 2.0 equiv. of (3R,4R)-benzyl 3-fluoro-4-vinylpyrrolidine-1-carboxylate) in CH2Cl2 (1.0 mL) was added over 3 minute at room temperature. After stirred for 20 min, the reaction mixture was quenched with saturated NaHCO3 solution and extracted with EtOAc. The organic layer was washed with water and brine, dried over anhydrous Na2SO4, filtered and concentrated. The crude product was purified on preparative reverse phase HPLC. The combined fractions of the product were neutralized with saturated NaHCO3 solution, which was then extracted with EtOAc. The organic layer was dried over anhydrous sodium sulfate, filtered and concentrated in vacuo to yield (3R,4R)-benzyl 3-(((R)-1-(5-benzyl-2-(2,5-difluorophenyl)thiazol-4-yl)-2,2-dimethylpropylamino)methyl)-4-fluoropyrrolidine-1-carboxylate (138 mg, 60%). LC/MS (uplc) MH+ 608.3, 1.14 min.

Aufarbeitung

  1. customthe reaction mixture was quenched with saturated NaHCO3 solution
  2. extractionextracted with EtOAc
  3. washThe organic layer was washed with water and brine
  4. dry with materialdried over anhydrous Na2SO4
  5. filtrationfiltered
  6. concentrationconcentrated
  7. customThe crude product was purified on preparative reverse phase HPLC
  8. extractionwas then extracted with EtOAc
  9. dry with materialThe organic layer was dried over anhydrous sodium sulfate
  10. filtrationfiltered
  11. concentrationconcentrated in vacuo

Quellen und Nachweise

ORD-Eintrag
ord-83d2ea9d43ed45bc9ef9bcc950a51c60
Quelldatensatz
uspto-grants-2014_06
Patentnummer
US08748626B2

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