Water → 4-[(1,3-Dihydro-1-hydroxy-2,1-benzoxaborol-5-yl)oxy]-benzamide

HRID 1255761Notes

Reaction equation

HRID 1255761 reaction equation
[OH:1][B:2]1[C:6]2[CH:7]=[CH:8][C:9]([O:11][C:12]3[CH:20]=[CH:19][C:15]([C:16](O)=[O:17])=[CH:14][CH:13]=3)=[CH:10][C:5]=2[CH2:4][O:3]1.C1N=C[N:23](C(N2C=NC=C2)=O)C=1.C(=O)([O-])[O-].[NH4+].[NH4+].O>CN(C=O)C>[OH:1][B:2]1[C:6]2[CH:7]=[CH:8][C:9]([O:11][C:12]3[CH:20]=[CH:19][C:15]([C:16]([NH2:23])=[O:17])=[CH:14][CH:13]=3)=[CH:10][C:5]=2[CH2:4][O:3]1

Participants

6

Reactant 4

HCID 962WaterHCID 682631,1'-CarbonyldiimidazoleHCID 517111Ammonium CarbonateHCID 25010450Benzoic acid, 4-[(1,3-dihydro-1-hydroxy-2,1-benzoxaborol-5-yl)oxy]-

Product 1

HCID 674405004-[(1,3-Dihydro-1-hydroxy-2,1-benzoxaborol-5-yl)oxy]-benzamide

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Procedure

To a 40 mL scintillation vial containing 4-(1-hydroxy-1,3-dihydro-benzo[c][1,2]oxaborol-5-yloxy)-benzoic acid (77 mg, 0.28 mmol, 1.0 eq.) and CDI (101.3 mg, 0.62 mmol), 2.5 eq.) in DMF (3.0 mL) was added Ammonium carbonate (123.3 mg, 1.28 mmol, 4.5 eq.). The mixture was stirred at room temperature overnight. The mixture was treated with H2O (5 mL) and the layers were separated. The aqueous was extracted with EtOAc (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 4-(1-hydroxy-1,3-dihydro-benzo[c][1,2]oxaborol-5-yloxy)-benzamide as a white solid. LCMS (m/z) 270 (M+H); 1H NMR (DMSO-d6) δ: 9.14 (s, 1H), 7.87-7.92 (m, 2H), 7.73 (d, J=7.8 Hz, 1H), 7.05 (d, J=8.8 Hz, 4H), 4.93 (s, 2H).

Workup

  1. customthe layers were separated
  2. extractionThe aqueous was extracted with EtOAc (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)

Sources & evidence

ORD record
ord-35ce5ba53be6451cab4f21ce685eeabb
Source dataset
uspto-grants-2013_06
Patent number
US08461135B2

Reaction notes

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