Methanol → 3-Hydroxy-7-methyl-2-(5-m-tolyl-[1,3,4]oxadiazol-2-yl)-pyrido[1,2-a]pyrimidin-4-one

HRID 222621Notes

Reaction equation

HRID 222621 reaction equation
C([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]1[O:22][C:23]([C:26]2[CH:27]=[C:28]([CH3:32])[CH:29]=[CH:30][CH:31]=2)=[N:24][N:25]=1)C1C=CC=CC=1.C[Si](I)(C)C.N#N.CO>C(#N)C.O>[OH: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]1[O:22][C:23]([C:26]2[CH:27]=[C:28]([CH3:32])[CH:29]=[CH:30][CH:31]=2)=[N:24][N:25]=1

Participants

7

Reactant 4

HCID 887MethanolHCID 947NitrogenHCID 85247Trimethylsilyl iodideHCID 581010333-Benzyloxy-7-methyl-2-(5-m-tolyl-[1,3,4]oxadiazol-2-yl)-pyrido[1,2-a]pyrimidin-4-one

Product 1

HCID 1359936133-Hydroxy-7-methyl-2-(5-m-tolyl-[1,3,4]oxadiazol-2-yl)-pyrido[1,2-a]pyrimidin-4-oneYield 88.6%

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 6342AcetonitrileSolvent

Procedure

To a stirred solution of the product from Example 8.4 (20 mg, 0.047 mmol) in acetonitrile (5 mL), was added trimethylsilyl iodide (54 uL, 0.38 mmol) dropwise under N2 at room temperature. After 2 h, methanol (5 mL) was added and the solution was stirred for 10 min. Water (10 mL) was added and the reaction extracted with dichloromethane. The organic phase was washed with aqueous sodium bisulfite solution, dried (Na2SO4) and concentrated in vacuo to afford the desired compound (88.6%).

Workup

  1. extractionthe reaction extracted with dichloromethane
  2. washThe organic phase was washed with aqueous sodium bisulfite solution
  3. dry with materialdried (Na2SO4)
  4. concentrationconcentrated in vacuo

Sources & evidence

ORD record
ord-00db4743ebb040e182b020576f20f9e1
Source dataset
uspto-grants-2012_06
Patent number
US08207334B2

Reaction notes

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