Diisopropylethylamine → HCID 58487029, compound

HRID 874650Notes

Reaction equation

HRID 874650 reaction equation
[Cl:1][C:2]1[C:10]([C:11]2[N:12]=[CH:13][C:14]([NH2:17])=[N:15][CH:16]=2)=[CH:9][C:8]2[CH2:7][CH2:6][O:5][C:4]=2[CH:3]=1.[F:18][C:19]1[CH:27]=[CH:26][CH:25]=[C:24]([F:28])[C:20]=1[C:21](Cl)=[O:22].CCN(C(C)C)C(C)C.C([O-])(O)=O.[Na+].C(Cl)Cl>C(Cl)Cl>[F:18][C:19]1[CH:27]=[CH:26][CH:25]=[C:24]([F:28])[C:20]=1[C:21]([NH:17][C:14]1[CH:13]=[N:12][C:11]([C:10]2[C:2]([Cl:1])=[CH:3][C:4]3[O:5][CH2:6][CH2:7][C:8]=3[CH:9]=2)=[CH:16][N:15]=1)=[O:22]

Participants

6

Reactant 4

HCID 81531DiisopropylethylamineHCID 874382,6-Difluorobenzoyl chlorideHCID 23716255Sodium bicarbonate methylene chlorideHCID 58486838HCID 58486838, compound

Product 1

HCID 58487029HCID 58487029, compoundYield 34.9%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Procedure

To a solution of 5-(6-chloro-2,3-dihydrobenzo[3,4-b]furan-5-yl)pyrazine-2ylamine (147) (7.8 mg, 0.031 mmol) in 1 ml DCM was added 2,6-difluorobenzoyl chloride (12 μl, 3 eq) followed by addition of DIEA (27 μl). The resulting solution was stirred at r.t. for overnight. The reaction mixture was worked up with aq. NaHCO3/DCM. DCM phase was washed with brine, concentrated to dryness. The residue was dissolved in 1 ml THF/MeOH/H2O (5:4:1) and stirred with 1N NaOH (100 μl) at 60° C. for 1 h and before worked up with EA/aq. NaHCO3. Prep HPLC purification furnished (2,6-difluorophenyl)-N-[5-(6-chloro(2,3-dihydrobenzo[b]furan-5-yl))pyrazin-2-yl]carboxamide (148) (4.2 mg, yield: 34.9%, purity>90%) as pale yellow solid.

Workup

  1. washDCM phase was washed with brine
  2. concentrationconcentrated to dryness
  3. dissolutionThe residue was dissolved in 1 ml THF/MeOH/H2O (5:4:1)
  4. stirringstirred with 1N NaOH (100 μl) at 60° C. for 1 h
  5. customPrep HPLC purification

Sources & evidence

ORD record
ord-a7228f3f32f2476ab5a04e1c65b78935
Source dataset
uspto-grants-2015_03
Patent number
US08980629B2

Reaction notes

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