Triethylamine → 4-(4-Fluoro-3-methoxy-benzylcarbamoyl)-benzenesulfonyl chloride

HRID 1178951Notes

Reaction equation

HRID 1178951 reaction equation
[Cl:1][S:2]([C:5]1[CH:13]=[CH:12][C:8]([C:9](Cl)=[O:10])=[CH:7][CH:6]=1)(=[O:4])=[O:3].[F:14][C:15]1[CH:22]=[CH:21][C:18]([CH2:19][NH2:20])=[CH:17][C:16]=1[O:23][CH3:24].CCN(CC)CC>C1COCC1.CN(C1C=CN=CC=1)C>[F:14][C:15]1[CH:22]=[CH:21][C:18]([CH2:19][NH:20][C:9]([C:8]2[CH:12]=[CH:13][C:5]([S:2]([Cl:1])(=[O:4])=[O:3])=[CH:6][CH:7]=2)=[O:10])=[CH:17][C:16]=1[O:23][CH3:24]

Participants

6

Reactant 3

HCID 8471TriethylamineHCID 820244-(Chlorosulphonyl)benzoyl chlorideHCID 442031244-Fluoro-3-methoxybenzylamine

Product 1

HCID 589751944-(4-Fluoro-3-methoxy-benzylcarbamoyl)-benzenesulfonyl chlorideYield 30.9%

Reagents, catalysts & solvents 2

HCID 142844-(Dimethylamino)pyridineCatalystHCID 8028TetrahydrofuranSolvent2×

Conditions

Temperature
-78 °C

Procedure

Dissolve 4-chlorosulfonyl-benzoyl chloride (3.18 g, 13.3 mmol) in THF (25 mL) and cool to −78° C. Slowly add a pre-mixed solution of 4-fluoro-3-methoxybenzyl-amine (1.91 g, 12.3 mmol), Et3N (1.64 mL, 11.8 mmol), and DMAP (150 mg, 1.23 mmol) in THF (25 mL) to the above cooled solution over 1 h. Stir the resulting mixture at −78° C. for 1 h, then warm to RT and stir for 4 h. Remove all solids by filtration and wash with THF (5 mL). Concentrate the filtrate and re-dissolve the crude material in EtOAc (30 mL) and wash with 1N HCl (30 mL). Separate the organic and aqueous layers and extract the aqueous phase with additional EtOAc (30 mL). Combine the organic solutions dry, filter, and concentrate. Purify the crude material by flash chromatography, using a linear gradient of 100% hexanes to 40% EtOAc/hexanes) to give the title compound as a white solid (1.36 g, 28%). MS (ES−) 356.1 (M−1)−. 1H NMR (400 MHz, CDCl3): δ 8.11 (d, 2H, J=8.3), 8.00 (d, 2H, J=8.8), 7.05 (dd, 1H, J=8.2, 11.1), 6.96 (dd, 1H, J=1.9, 8.0), 6.86 (m, 1H), 6.44 (br s, 1H), 4.61 (d, 2H, J=5.7), 3.88 (s, 3H).

Workup

  1. temperaturewarm to RT
  2. stirringstir for 4 h
  3. customRemove all solids
  4. filtrationby filtration
  5. washwash with THF (5 mL)
  6. concentrationConcentrate the filtrate
  7. dissolutionre-dissolve the crude material in EtOAc (30 mL)
  8. washwash with 1N HCl (30 mL)
  9. customSeparate the organic and aqueous layers
  10. extractionextract the aqueous phase with additional EtOAc (30 mL)
  11. customCombine the organic solutions dry
  12. filtrationfilter
  13. concentrationconcentrate
  14. customPurify the crude material by flash chromatography

Sources & evidence

ORD record
ord-b2fe201838014af1a496f244f1647331
Source dataset
uspto-grants-2007_10
Patent number
US07276516B2

Reaction notes

Loading…