2-Amino-5-methylpyridine → HCID 66756004, compound

HRID 1177289Notes

Reaction equation

HRID 1177289 reaction equation
[NH2:1][C:2]1[CH:7]=[CH:6][C:5]([CH3:8])=[CH:4][N:3]=1.[Al](Cl)(C)C.[F:13][CH:14]([F:40])[C:15]1[O:16][C:17]2[CH:23]=[C:22]([C:24](OCC)=[O:25])[CH:21]=[C:20]([O:29][C:30]3[CH:35]=[CH:34][C:33]([S:36]([CH3:39])(=[O:38])=[O:37])=[CH:32][CH:31]=3)[C:18]=2[CH:19]=1>ClCCCl>[F:40][CH:14]([F:13])[C:15]1[O:16][C:17]2[CH:23]=[C:22]([C:24]([NH:1][C:2]3[CH:7]=[CH:6][C:5]([CH3:8])=[CH:4][N:3]=3)=[O:25])[CH:21]=[C:20]([O:29][C:30]3[CH:31]=[CH:32][C:33]([S:36]([CH3:39])(=[O:37])=[O:38])=[CH:34][CH:35]=3)[C:18]=2[CH:19]=1

Participants

5

Reactant 3

HCID 153482-Amino-5-methylpyridineHCID 79147ChlorodimethylaluminumHCID 66755846HCID 66755846, compound

Product 1

HCID 66756004HCID 66756004, compoundYield 80%

Reagents, catalysts & solvents 1

HCID 111,2-DichloroethaneSolvent

Procedure

2-Amino-5-methylpyridine (264 mg, 2.44 mmol) was dissolved in DCE (10 mL) at 0° C., then Al(CH3)2Cl (2.44 mL, 1M in hexanes) was added drop wise. After the addition, the ice-bath was removed, and the mixture was stirred for 30 minutes at room temperature. Ethyl 2-(difluoromethyl)-4-[4-(methylsulfonyl)phenoxy]-1-benzofuran-6-carboxylate (100 mg, 0.244 mmol) was added, and the stirring was continued for 14 h. The reaction was quenched with potassium sodium tartrate tetrahydrate (20% w/w) cautiously. The product was extracted with CHCl3, washed with brine and dried over MgSO4. The product was purified by reverse phase HPLC to give the title compound (92 mg, 80%) as a white solid. 1H NMR (400 MHz, CHLOROFORM-D) δ ppm 2.31 (s, 3 H) 3.08 (s, 3 H) 6.75 (t, J=53.94 Hz, 1 H) 6.98 (s, 1 H) 7.12-7.20 (m, 2 H) 7.51 (d, J=1.01 Hz, 1 H) 7.58 (dd, J=8.46, 2.15 Hz, 1 H) 7.91-7.96 (m, 2 H) 7.97 (s, 1 H) 8.11 (d, J=2.15 Hz, 1 H) 8.23 (d, J=8.46 Hz, 1 H) 8.54 (s, 1 H). LCMS m/z 473.0 (M+H)+.

Workup

  1. additionAfter the addition
  2. customthe ice-bath was removed
  3. waitthe stirring was continued for 14 h
  4. customThe reaction was quenched with potassium sodium tartrate tetrahydrate (20% w/w) cautiously
  5. extractionThe product was extracted with CHCl3
  6. washwashed with brine
  7. dry with materialdried over MgSO4
  8. customThe product was purified by reverse phase HPLC

Sources & evidence

ORD record
ord-f4d7f92961c14d388fe6ec1d2e5f6590
Source dataset
uspto-grants-2010_11
Patent number
US07842713B2

Reaction notes

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