Benzylamine → HCID 44476094, Verbindung

To a 40 mL scintillation vial containing 4-(1-hydroxy-1,3-dihydro-benzo[c][1,2]oxaborol-5-yloxy)-benzoic acid (150 mg, 0.55 mmol, 1.0 eq.), EDCI (157.2 mg, 0.82 mmol, 1.5 eq.), HOBt (111.5 mg, 0.82 mmol, 1.5 eq.) and DMAP (12 mg, 0.1 mmol, 0.2 eq.) in DCM (10.0 mL) was added benzylamine (24 μL, 2.2 mmol, 4.0 eq.) drop wise. The mixture was stirred at room temperature overnight. The mixture was treated with H2O (10 mL) and the layers were separated. The aqueous was extracted with DCM (2×5 mL), combined organic phase was washed with brine (10 mL), dried over MgSO4, filtered and the filtrate was concentrated under reduced pressure. The residue was applied to silica chromatography eluting with MeOH/DCM (0:100 to 10:90) to give N-benzyl-4-(1-hydroxy-1,3-dihydro-benzo[c][1,2]oxaborol-5-yloxy)-benzamide as a white solid. LCMS (m/z) 360 (M+H); 1H NMR (DMSO-d6) δ: 9.01 (t, J=6.0 Hz, 1H), 7.91-8.00 (m, 2H), 7.76 (d, J=7.9 Hz, 1H), 7.29-7.36 (m, 5H), 7.21-7.27 (m, 1H), 7.08-7.13 (m, 2H), 7.02-7.07 (m, 2H), 4.95 (s, 2H), 4.48 (d, J=6.0 Hz, 2H).

1. customthe layers were separated
2. extractionThe aqueous was extracted with DCM (2×5 mL)
3. washwas washed with brine (10 mL)
4. dry with materialdried over MgSO4
5. filtrationfiltered
6. concentrationthe filtrate was concentrated under reduced pressure
7. washeluting with MeOH/DCM (0:100 to 10:90)

ORD-Eintrag

ord-1ffc82c8647d4cd4b94f50a0fe05d26f

Quelldatensatz

uspto-grants-2011_10

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US08039450B2