Sodium Carbonate → 2-(4,5-Dimethoxy-2-methoxymethoxyphenyl)-4-(2-pyridylmethyl)aminomethylbenzoxazole

HRID 2213981Notes

Reaction equation

HRID 2213981 reaction equation
Br[CH2:2][C:3]1[C:8]2[N:9]=[C:10]([C:12]3[CH:17]=[C:16]([O:18][CH3:19])[C:15]([O:20][CH3:21])=[CH:14][C:13]=3[O:22][CH2:23][O:24][CH3:25])[O:11][C:7]=2[CH:6]=[CH:5][CH:4]=1.[NH2:26][CH2:27][C:28]1[CH:33]=[CH:32][CH:31]=[CH:30][N:29]=1.C([O-])([O-])=O.[Na+].[Na+]>CC#N>[CH3:21][O:20][C:15]1[C:16]([O:18][CH3:19])=[CH:17][C:12]([C:10]2[O:11][C:7]3[CH:6]=[CH:5][CH:4]=[C:3]([CH2:2][NH:26][CH2:27][C:28]4[CH:33]=[CH:32][CH:31]=[CH:30][N:29]=4)[C:8]=3[N:9]=2)=[C:13]([O:22][CH2:23][O:24][CH3:25])[CH:14]=1

Participants

5

Reactant 3

HCID 10340Sodium CarbonateHCID 195092-PyridinemethanamineHCID 219593354-Bromomethyl-2-(4,5-dimethoxy-2-methoxymethoxyphenyl)benzoxazole

Product 1

HCID 219593292-(4,5-Dimethoxy-2-methoxymethoxyphenyl)-4-(2-pyridylmethyl)aminomethylbenzoxazoleYield 17.1%

Reagents, catalysts & solvents 1

HCID 6342AcetonitrileSolvent

Procedure

A mixture of 6 (612 mg, 1.5 mmol), 2-(aminomethyl)pyridine (1.08 g, 10 mmol), and Na2CO3 (excess) in CH3CN (30 mL) was stirred overnight at room temperature. Insoluble material was removed by filtration and the filtrate was concentrated in vacuo. Water (20 mL) was added to the residue, which was extracted with ethyl acetate (20 mL) three times. The combined organic layer was washed with brine and water, dried over MgSO4, and evaporated. The resulting oily material was purified by silica gel column chromatography (CHCl3-ethyl acetate) to afford 7 as pale yellow oil (112 mg, 17%): 1H-NMR (500 MHz, CDCl3) δ53.56 (s, 3H), 3.95 (s, 3H), 3.97 (s, 3H), 4.02 (s, 2H), 4.30 (s, 2H), 5.27 (s, 2H), 6.85 (s, 1H), 7.15 (dd, 1H, J=7.5, 5.0 Hz), 7.28 (t, 1H, J=7.5 Hz), 7.33 (d, 1H, J=7.5 Hz), 7.42 (d, 1H, J=7.5 Hz), 7.47 (d, 1H, J=7.5 Hz), 7.64 (m, 2H), 8.55 (d, 1H, J=5.0 Hz).

Workup

  1. customInsoluble material was removed by filtration
  2. concentrationthe filtrate was concentrated in vacuo
  3. additionWater (20 mL) was added to the residue, which
  4. extractionwas extracted with ethyl acetate (20 mL) three times
  5. washThe combined organic layer was washed with brine and water
  6. dry with materialdried over MgSO4
  7. customevaporated
  8. customThe resulting oily material was purified by silica gel column chromatography (CHCl3-ethyl acetate)

Sources & evidence

ORD record
ord-7a586e9006264600b502a45bcdcba3b5
Source dataset
uspto-grants-2006_09
Patent number
US07105680B1

Reaction notes

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