Water → ethyl 6-(N-(3-bromophenyl)methylsulfonamido)-5-cyclopropyl-2-(4-fluorophenyl)benzofuran-3-carboxylate

HRID 2272369Notes

Reaction equation

HRID 2272369 reaction equation
C[Si]([N-][Si](C)(C)C)(C)C.[Li+].[Br:11][C:12]1[CH:13]=[C:14]([NH:18][C:19]2[C:39]([CH:40]3[CH2:42][CH2:41]3)=[CH:38][C:22]3[C:23]([C:33]([O:35][CH2:36][CH3:37])=[O:34])=[C:24]([C:26]4[CH:31]=[CH:30][C:29]([F:32])=[CH:28][CH:27]=4)[O:25][C:21]=3[CH:20]=2)[CH:15]=[CH:16][CH:17]=1.[CH3:43][S:44](Cl)(=[O:46])=[O:45].O>C1COCC1.CCOC(C)=O>[Br:11][C:12]1[CH:13]=[C:14]([N:18]([C:19]2[C:39]([CH:40]3[CH2:42][CH2:41]3)=[CH:38][C:22]3[C:23]([C:33]([O:35][CH2:36][CH3:37])=[O:34])=[C:24]([C:26]4[CH:27]=[CH:28][C:29]([F:32])=[CH:30][CH:31]=4)[O:25][C:21]=3[CH:20]=2)[S:44]([CH3:43])(=[O:46])=[O:45])[CH:15]=[CH:16][CH:17]=1

Participants

7

Reactant 4

HCID 962WaterHCID 31297Methanesulfonyl chlorideHCID 2733832Lithium HexamethyldisilazideHCID 71258359Ethyl 6-((3-bromophenyl)amino)-5-cyclopropyl-2-(4-fluorophenyl)benzofuran-3-carboxylate

Product 1

HCID 131732322ethyl 6-(N-(3-bromophenyl)methylsulfonamido)-5-cyclopropyl-2-(4-fluorophenyl)benzofuran-3-carboxylateYield 37.5%

Reagents, catalysts & solvents 2

HCID 8028TetrahydrofuranSolvent2×HCID 8857Ethyl AcetateSolvent

Procedure

A solution of lithium bis(trimethylsilyl)amide (1 M in THF) (1.93 mL, 1.93 mmol) was added dropwise to a solution of ethyl 6-((3-bromophenyl)amino)-5-cyclopropyl-2-(4-fluorophenyl)benzofuran-3-carboxylate (734 mg, 1.48 mmol) in THF (10 mL) at −78° C. The mixture was stirred for 45 minutes and then a solution of methanesulfonyl chloride (0.463 mL, 5.94 mmol) in THF (1.5 mL) was added at −78° C. After complete addition the reaction mixture was allowed to warm to room temperature overnight. Water and EtOAc were added. The organic layer was washed with water and brine, dried over sodium sulfate and concentrated. The residue was purified by silica gel chromatography (hexane:EtOAc) to give ethyl 6-(N-(3-bromophenyl)methylsulfonamido)-5-cyclopropyl-2-(4-fluorophenyl)benzofuran-3-carboxylate (318 mg, 37%) as a yellow solid. 1H NMR (400 MHz, DMSO-d6) δ ppm 8.20 (s, 1H) 8.03-8.13 (m, 2H) 7.62-7.66 (m, 1H) 7.59 (s, 1H) 7.43 (s, 4H) 7.30-7.39 (m, 1H) 4.26-4.41 (m, 2H) 3.42 (s, 3H) 2.12-2.26 (m, 1H) 1.28-1.37 (m, 3H) 0.71-1.14 (m, 4H) 0.41 (m, 1H). %). LCMS (m/z, ES+)=572, 574 (M+H, M+2).

Workup

  1. additionAfter complete addition the reaction mixture
  2. washThe organic layer was washed with water and brine
  3. dry with materialdried over sodium sulfate
  4. concentrationconcentrated
  5. customThe residue was purified by silica gel chromatography (hexane:EtOAc)

Sources & evidence

ORD record
ord-88b318c593864540ae1a590e5555f8f8
Source dataset
uspto-grants-2015_09
Patent number
US09119868B2

Reaction notes

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