(7-(Benzyloxy)-6-methoxy-4-oxoquinazolin-3(4H)-yl)methyl pivalate → (7-Hydroxy-6-methoxy-4-oxoquinazolin-3(4H)-yl)methyl pivalate

HRID 1597226Notes

Reaction equation

HRID 1597226 reaction equation
C([O:8][C:9]1[CH:18]=[C:17]2[C:12]([C:13](=[O:27])[N:14]([CH2:19][O:20][C:21](=[O:26])[C:22]([CH3:25])([CH3:24])[CH3:23])[CH:15]=[N:16]2)=[CH:11][C:10]=1[O:28][CH3:29])C1C=CC=CC=1>[Pd].C(OCC)(=O)C.CN(C=O)C.CO.C(O)(=O)C>[OH:8][C:9]1[CH:18]=[C:17]2[C:12]([C:13](=[O:27])[N:14]([CH2:19][O:20][C:21](=[O:26])[C:22]([CH3:23])([CH3:24])[CH3:25])[CH:15]=[N:16]2)=[CH:11][C:10]=1[O:28][CH3:29]

Participants

7

Reactant 1

HCID 10834555(7-(Benzyloxy)-6-methoxy-4-oxoquinazolin-3(4H)-yl)methyl pivalate

Product 1

HCID 10804576(7-Hydroxy-6-methoxy-4-oxoquinazolin-3(4H)-yl)methyl pivalateYield 80.4%

Reagents, catalysts & solvents 5

HCID 23938PalladiumCatalystHCID 176Acetic AcidSolventHCID 887MethanolSolventHCID 6228DimethylformamideSolventHCID 8857Ethyl AcetateSolvent

Procedure

A mixture of 7-benzyloxy-6-methoxy-3-((pivaloyloxy)methyl)-3,4-dihydroquinazolin-4-one (7 g, 17.7 mmol) and 10% palladium-on-charcoal catalyst (700 mg) in ethyl acetate (250 ml), DMF (50 ml), methanol (50 ml) and acetic acid (0.7 ml) was stirred under hydrogen at atmospheric pressure for 40 minutes. The catalyst was removed by filtration and the volatiles removed from the filtrate by evaporation. The residue was triturated with ether, collected by filtration and dried under vacuum to give 7-hydroxy-6-methoxy-3-((pivaloyloxy)methyl)-3,4-dihydroquinazolin-4-one (4.36 g, 80%).

Workup

  1. customThe catalyst was removed by filtration
  2. customthe volatiles removed from the filtrate by evaporation
  3. customThe residue was triturated with ether
  4. filtrationcollected by filtration
  5. customdried under vacuum

Sources & evidence

ORD record
ord-6a1499e822f1405fbf340d6ceac8c752
Source dataset
uspto-grants-2001_09
Patent number
US06294532B1

Reaction notes

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