Pyridine → HCID 69734019, Verbindung

HRID 488357Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 488357
[NH2:1][CH2:2][C@@H:3]1[O:7][C:6](=[O:8])[N:5]([C:9]2[CH:10]=[C:11]3[C:16](=[CH:17][CH:18]=2)[CH2:15][N:14]([C:19]([O:21][CH2:22][C:23]2[CH:28]=[CH:27][CH:26]=[CH:25][CH:24]=2)=[O:20])[CH2:13][CH2:12]3)[CH2:4]1.N1C=CC=CC=1.[C:35](OC(=O)C)(=[O:37])[CH3:36]>C(Cl)Cl>[C:35]([NH:1][CH2:2][C@@H:3]1[O:7][C:6](=[O:8])[N:5]([C:9]2[CH:10]=[C:11]3[C:16](=[CH:17][CH:18]=2)[CH2:15][N:14]([C:19]([O:21][CH2:22][C:23]2[CH:24]=[CH:25][CH:26]=[CH:27][CH:28]=2)=[O:20])[CH2:13][CH2:12]3)[CH2:4]1)(=[O:37])[CH3:36]

Komponenten

5

Edukt 3

HCID 1049PyridineHCID 7918Acetic AnhydrideHCID 69733820HCID 69733820, Verbindung

Produkt 1

HCID 69734019HCID 69734019, VerbindungAusbeute 93,1 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 6344DichloromethaneLösungsmittel

Versuchsvorschrift

A solution of phenylmethyl 6-[(5S)-5-(aminomethyl)-2-oxo-3-oxazolidinyl]-3,4-dihydro-2(1H)-isoquinolinecarboxylate (Step 4, 1.75 g, 4.59 mmol) and pyridine (1.11 mL, 13.77 mmol) in dry CH2Cl2 (23 mL) under N2 is treated with acetic anhydride (0.649 mL, 6.88 mmol), and the mixture is stirred at ambient temperature for 3.5 hrs. The mixture is then washed with H2O (2×15 mL) and brine (10 mL), dried over Na2SO4 and concentrated under reduced pressure. The crude product is chromatographed on a Flash 40S silica gel (40 g, 32-63 μm) cartridge, eluting with a gradient of MeOH/CH2Cl2 (0.5/99.5-2/98), and those fractions with an Rf=0.25 by TLC (MeOH/CHCl3, 5/95) are pooled and concentrated to give 1.81 g (93%) of the title compound as an amorphous, white solid. 1H NMR (400 MHz, CDCl3) δ 7.35 (m, 7H), 7.11 (m, 1H), 6.11 (m, 1H), 5.19 (s, 2H), 4.78 (m, 1H), 4.62 (s, 2H), 4.05 (t, 1H), 3.78 (dd, 1H), 3.70 (m, 3H), 3.60 (m, 1H), 2.86 (m, 2H), 2.02 (s, 3H); MS (ESI+) for C23H25N3O5 m/z 424 (M+H)+; [α]25D=−17° (c 0 77, DMSO).

Aufarbeitung

  1. washThe mixture is then washed with H2O (2×15 mL) and brine (10 mL)
  2. dry with materialdried over Na2SO4
  3. concentrationconcentrated under reduced pressure
  4. customThe crude product is chromatographed on a Flash 40S silica gel (40 g, 32-63 μm) cartridge
  5. washeluting with a gradient of MeOH/CH2Cl2 (0.5/99.5-2/98)
  6. concentrationconcentrated

Quellen und Nachweise

ORD-Eintrag
ord-8f79fd1ec183403780bef650daa2bed4
Quelldatensatz
uspto-grants-2005_12
Patentnummer
US06972286B2

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