Hydrogen Bromide → HCID 131732301, compound

HRID 2272350Notes

Reaction equation

HRID 2272350 reaction equation
N[C:2]1[CH:11]=[CH:10][C:9]([N:12]([C:17]2[C:36]([CH:37]3[CH2:39][CH2:38]3)=[CH:35][C:20]3[C:21]([C:31](=[O:34])[NH:32][CH3:33])=[C:22]([C:24]4[CH:29]=[CH:28][C:27]([F:30])=[CH:26][CH:25]=4)[O:23][C:19]=3[CH:18]=2)[S:13]([CH3:16])(=[O:15])=[O:14])=[CH:8][C:3]=1[C:4]([O:6][CH3:7])=[O:5].[BrH:40].N([O-])=O.[Na+]>C(#N)C.[Cu]Br>[Br:40][C:2]1[CH:11]=[CH:10][C:9]([N:12]([C:17]2[C:36]([CH:37]3[CH2:39][CH2:38]3)=[CH:35][C:20]3[C:21]([C:31](=[O:34])[NH:32][CH3:33])=[C:22]([C:24]4[CH:29]=[CH:28][C:27]([F:30])=[CH:26][CH:25]=4)[O:23][C:19]=3[CH:18]=2)[S:13]([CH3:16])(=[O:15])=[O:14])=[CH:8][C:3]=1[C:4]([O:6][CH3:7])=[O:5]

Participants

6

Reactant 3

HCID 260Hydrogen BromideHCID 23668193Sodium NitriteHCID 122643079HCID 122643079, compound

Product 1

HCID 131732301HCID 131732301, compoundYield 55.4%

Reagents, catalysts & solvents 2

HCID 24593copper(I) bromideCatalystHCID 6342AcetonitrileSolvent

Procedure

A suspension of methyl 2-amino-5-(N-(5-cyclopropyl-2-(4-fluorophenyl)-3-(methylcarbamoyl)benzofuran-6-yl)methylsulfonamido)benzoate (1.6 g, 2.70 mmol) in acetonitrile (30 mL) and hydrogen bromide (25 mL, 2.70 mmol) was treated with aqueous sodium nitrite (0.205 g, 2.97 mmol) at 0° C. and the mixture was stirred for 30 min, copper(I) bromide (0.464 g, 3.24 mmol) was added in portions at the same temperature. It was allowed to warm up to room temperature and then heated to 55° C. overnight. The mixture was cooled down to room temperature and partitioned between EtOAc and water. The organic phase was washed with brine, dried over Na2SO4. Concentrated under reduced pressure, the residue was purified by flashing chromatography on silica gel eluted with 0-50% EtOAc in hexane to give the product (0.92 g, 55%) as a white foam. 1H NMR (400 MHz, DMSO-d6) δ ppm 8.49 (q, J=4.23 Hz, 1H) 8.14 (s, 1H) 7.97 (dd, J=8.78, 5.46 Hz, 2H) 7.80 (d, J=2.93 Hz, 1H) 7.75 (d, J=8.78 Hz, 1H) 7.50 (dd, J=8.88, 2.83 Hz, 1H) 7.41 (t, J=8.88 Hz, 2H) 7.22 (s, 1H) 3.84 (s, 3H) 3.44 (s, 3H) 2.84 (d, J=4.68 Hz, 3H) 2.05-2.15 (m, 1H) 0.92-1.05 (br. s, 1H) 0.87 (br. s., 2H) 0.40 (br. s., 1H). LCMS (m/z, ES+)=617 (M+H+).

Workup

  1. temperatureheated to 55° C. overnight
  2. temperatureThe mixture was cooled down to room temperature
  3. custompartitioned between EtOAc and water
  4. washThe organic phase was washed with brine
  5. dry with materialdried over Na2SO4
  6. concentrationConcentrated under reduced pressure
  7. customthe residue was purified
  8. washeluted with 0-50% EtOAc in hexane

Sources & evidence

ORD record
ord-ba94e0c631624f17aaacff4e9d6839d1
Source dataset
uspto-grants-2015_09
Patent number
US09119868B2

Reaction notes

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