1,2,3-Trichloro-5-(3,3,3-trifluoroprop-1-en-2-yl)benzene → 3,3-dimethyl-5-(5-(3,4,5-trichlorophenyl)-5-(trifluoromethyl)-4,5-dihydroisoxazol-3-yl)benzo[c][1,2]oxaborol-1(3H)-ol

HRID 1750774Notes

Reaction equation

HRID 1750774 reaction equation
[OH:1][N:2]=[C:3](Cl)[C:4]1[CH:15]=[CH:14][C:7]2[B:8]([OH:13])[O:9][C:10]([CH3:12])([CH3:11])[C:6]=2[CH:5]=1.[Cl:17][C:18]1[CH:23]=[C:22]([C:24]([C:26]([F:29])([F:28])[F:27])=[CH2:25])[CH:21]=[C:20]([Cl:30])[C:19]=1[Cl:31]>CN(C=O)C>[CH3:11][C:10]1([CH3:12])[O:9][B:8]([OH:13])[C:7]2[CH:14]=[CH:15][C:4]([C:3]3[CH2:25][C:24]([C:22]4[CH:21]=[C:20]([Cl:30])[C:19]([Cl:31])=[C:18]([Cl:17])[CH:23]=4)([C:26]([F:29])([F:28])[F:27])[O:1][N:2]=3)=[CH:5][C:6]1=2

Participants

4

Reactant 2

HCID 498201551,2,3-Trichloro-5-(3,3,3-trifluoroprop-1-en-2-yl)benzeneHCID 86685046N,1-dihydroxy-3,3-dimethyl-1,3-dihydrobenzo[c][1,2]oxaborole-5-carbimidoyl chloride

Product 1

HCID 715733913,3-dimethyl-5-(5-(3,4,5-trichlorophenyl)-5-(trifluoromethyl)-4,5-dihydroisoxazol-3-yl)benzo[c][1,2]oxaborol-1(3H)-olYield 30%

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Procedure

To a solution of N,1-dihydroxy-3,3-dimethyl-1,3-dihydrobenzo[c][1,2]oxaborole-5-carbimidoyl chloride (850 mg, 3.55 mmol) and 1,2,3-trichloro-5-(3,3,3-trifluoroprop-1-en-2-yl)benzene (1.47 g, 5.32 mmol) in DMF (10 mL) at rt was added TEA (0.5 mL, 3.55 mmol). The reaction mixture was stirred at rt for 18 h, poured into ice-water and extracted with EA (20 mL). The organic layer was washed with brine, dried over Na2SO4, filtered and concentrated under reduced pressure. The residue was purified by column chromatography to give the desired title compound 3,3-dimethyl-5-(5-(3,4,5-trichlorophenyl)-5-(trifluoromethyl)-4,5-dihydroisoxazol-3-yl)benzo[c][1,2]oxaborol-1(3H)-ol (510 mg; 30% yield) as a white solid. 1H NMR (400 MHz, DMSO-d6): δ 9.25 (s, 1H), 7.86 (s, 2H), 7.78 (s, 2H), 7.72 (d, J=7.2 Hz, 1H), 4.46 (d, J=19.2 Hz, 1H), 4.35 (d, J=18.4 Hz, 1H), 1.49 (s,6H) ppm; HPLC purity: 95.3% at 220 nm and 96.8% at 254 nm; MS: m/z=478.4 (M+, ESI+).

Workup

  1. extractionextracted with EA (20 mL)
  2. washThe organic layer was washed with brine
  3. dry with materialdried over Na2SO4
  4. filtrationfiltered
  5. concentrationconcentrated under reduced pressure
  6. customThe residue was purified by column chromatography

Sources & evidence

ORD record
ord-6008198b2c9449468d4a7bb91d673323
Source dataset
uspto-grants-2015_10
Patent number
US09156860B2

Reaction notes

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