Pyridine → (Z)-2,2,2-trifluoro-N-(4-(N-(1-hydroxy-1,3-dihydrobenzo[c][1,2]oxaborol-6-yl)sulfamoyl)-3-((2-oxodihydrofuran-3(2H)-ylidene)methyl)phenyl)acetamide

HRID 1256161Notes

Reaction equation

HRID 1256161 reaction equation
[O:1]=[C:2]1[O:3][CH2:4][CH2:5]/[C:6]/1=[CH:7]/[C:8]1[CH:13]=[C:12]([NH:14][C:15](=[O:20])[C:16]([F:19])([F:18])[F:17])[CH:11]=[CH:10][C:9]=1[S:21](Cl)(=[O:23])=[O:22].[NH2:25][C:26]1[CH:27]=[CH:28][C:29]2[CH2:33][O:32][B:31]([OH:34])[C:30]=2[CH:35]=1.N1C=CC=CC=1>O=[N+]([O-])[O-].[O-][N+](=O)[O-].[O-][N+](=O)[O-].[O-][N+](=O)[O-].[O-][N+](=O)[O-].[O-][N+](=O)[O-].[Ce+4].[NH4+].[NH4+]>[F:17][C:16]([F:19])([F:18])[C:15]([NH:14][C:12]1[CH:11]=[CH:10][C:9]([S:21](=[O:23])(=[O:22])[NH:25][C:26]2[CH:27]=[CH:28][C:29]3[CH2:33][O:32][B:31]([OH:34])[C:30]=3[CH:35]=2)=[C:8](/[CH:7]=[C:6]2\[C:2](=[O:1])[O:3][CH2:4][CH2:5]\2)[CH:13]=1)=[O:20]

Participants

5

Reactant 3

HCID 1049PyridineHCID 37701876-Aminobenzo(c)(1,2)oxaborol-1(3H)-olHCID 86655231(Z)-2-((2-oxodihydrofuran-3(2H)-ylidene)methyl)-4-(2,2,2-trifluoroacetamido)benzene-1-sulfonyl chloride

Product 1

HCID 86655230(Z)-2,2,2-trifluoro-N-(4-(N-(1-hydroxy-1,3-dihydrobenzo[c][1,2]oxaborol-6-yl)sulfamoyl)-3-((2-oxodihydrofuran-3(2H)-ylidene)methyl)phenyl)acetamideYield 68.5%

Reagents, catalysts & solvents 1

HCID 180504Ceric ammonium nitrateSolvent

Procedure

The crude intermediate (Z)-2-((2-oxodihydrofuran-3(2H)-ylidene)methyl)-4-(2,2,2-trifluoroacetamido)benzene-1-sulfonyl chloride (2.85 g, 10 mmol) and 6-aminobenzo[c][1,2]oxaborol-1(3H)-ol (1.5 g, 10 mmol) was suspended in CAN (50 ml), followed by the addition of pyridine (3 ml) dropwise. After stirred at rt for 3 hrs, the mixture was poured into ice-H2O and extracted with EtOAc, washed with H2O, brine, dried over MgSO4, filtered, concentrated in reduced pressure to dryness. The crude product was treated with DCM to give (Z)-2,2,2-trifluoro-N-(4-(N-(1-hydroxy-1,3-dihydrobenzo[c][1,2]oxaborol-6-yl)sulfamoyl)-3-((2-oxodihydrofuran-3(2H)-ylidene)methyl)phenyl)acetamide as a solid (3.4 g). 1H NMR (400 MHz, DMSO-d6) δ (ppm): 11.63 (s, 1H), 10.34 (s, 1H), 9.18 (s, 1H), 8.00 (d, J=8.4 Hz, 1H), 7.87 (s, 1H), 7.87 (dd, J=8.4, 1.6 Hz, 1H), 7.82 (t, J=2.8 Hz, 1H), 7.34 (d, J=1.6 Hz, 1H), 7.21 (d, J=8.4 Hz, 1H), 7.07 (dd, J=8.4, 1.6 Hz, 1H), 4.85 (s, 2H), 4.28 (t, J=7.2 Hz, 2H), 2.88 (dt, J=2.8, 7.2 Hz, 2H). MS (ESI) m/z=495 (M−1).

Workup

  1. extractionextracted with EtOAc
  2. washwashed with H2O, brine
  3. dry with materialdried over MgSO4
  4. filtrationfiltered
  5. concentrationconcentrated in reduced pressure to dryness
  6. additionThe crude product was treated with DCM

Sources & evidence

ORD record
ord-8cb9e1279734412f98ae6f979793fdfd
Source dataset
uspto-grants-2013_06
Patent number
US08461134B2

Reaction notes

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