Sodium Carbonate → 3-Benzyloxy-7-methyl-4-oxo-4H-pyrido[1,2-a]pyrimidine-2-carboxylic acid N'-[2-(4-fluoro-phenyl)-acetyl]-hydrazide

HRID 1097754Notes

Reaction equation

HRID 1097754 reaction equation
[CH2:1]([O:8][C:9]1[C:14](=[O:15])[N:13]2[CH:16]=[C:17]([CH3:20])[CH:18]=[CH:19][C:12]2=[N:11][C:10]=1[C:21]([NH:23][NH2:24])=[O:22])[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.C(=O)([O-])[O-].[Na+].[Na+].[F:31][C:32]1[CH:37]=[CH:36][C:35]([CH2:38][C:39](Cl)=[O:40])=[CH:34][CH:33]=1>O1CCCC1>[F:31][C:32]1[CH:37]=[CH:36][C:35]([CH2:38][C:39]([NH:24][NH:23][C:21]([C:10]2[N:11]=[C:12]3[CH:19]=[CH:18][C:17]([CH3:20])=[CH:16][N:13]3[C:14](=[O:15])[C:9]=2[O:8][CH2:1][C:2]2[CH:3]=[CH:4][CH:5]=[CH:6][CH:7]=2)=[O:22])=[O:40])=[CH:34][CH:33]=1

Participants

5

Reactant 3

HCID 10340Sodium CarbonateHCID 37449884-Fluorophenylacetyl chlorideHCID 593929043-Benzyloxy-7-methyl-4-oxo-4H-pyrido[1,2-a]pyrimidine-2-carboxylic acid hydrazide

Product 1

HCID 593928983-Benzyloxy-7-methyl-4-oxo-4H-pyrido[1,2-a]pyrimidine-2-carboxylic acid N'-[2-(4-fluoro-phenyl)-acetyl]-hydrazideYield 87%

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Procedure

The product from Example 9.1 (160 mg, 0.524 mmol) and sodium carbonate (106 mg, 1 mmol) were mixed with anhydrous tetrahydrofuran (25 mL) and then cooled in ice bath. To this stirred solution was added 4-fluorophenylacetyl chloride (90 mg, 0.55 mmol) dropwise. The mixture was stirred at room temperature for 2 h then concentrated in vacuo. The residue was portioned between ethyl acetate and water and the organic phase washed with water, dried (Na2SO4) and concentrated in vacuo. Short column chromatography afforded the desired compound (210 mg, yield 86%)

Workup

  1. temperaturecooled in ice bath
  2. concentrationthen concentrated in vacuo
  3. washthe organic phase washed with water
  4. dry with materialdried (Na2SO4)
  5. concentrationconcentrated in vacuo

Sources & evidence

ORD record
ord-5fdbd53e6283488098e3d0f5240cae48
Source dataset
uspto-grants-2012_03
Patent number
US08143268B2

Reaction notes

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