Water → 5-(5-(quinazolin-4-yloxy)pentyloxy)-2-(hydroxymethyl)-4H-pyran-4-one
Reaction equation
[N:1]1[C:10]2[C:5](=[CH:6][CH:7]=[CH:8][CH:9]=2)[C:4]([OH:11])=[N:3][CH:2]=1.C([O-])([O-])=O.[Cs+].[Cs+].Br[CH2:19][CH2:20][CH2:21][CH2:22][CH2:23][O:24][C:25]1[C:26](=[O:33])[CH:27]=[C:28]([CH2:31][OH:32])[O:29][CH:30]=1.O>CN(C=O)C>[N:1]1[C:10]2[C:5](=[CH:6][CH:7]=[CH:8][CH:9]=2)[C:4]([O:11][CH2:19][CH2:20][CH2:21][CH2:22][CH2:23][O:24][C:25]2[C:26](=[O:33])[CH:27]=[C:28]([CH2:31][OH:32])[O:29][CH:30]=2)=[N:3][CH:2]=1Participants
6
Reactant 4
Product 1
Reagents, catalysts & solvents 1
Procedure
Quinazolin-4-ol (1.0 g, 6.84 mmol) was dissolved in DMF (7 mL). Cs2CO3 (2.23 g, 6.84 mmol) was added at RT and the mixture was stirred for 10 min. A solution of 5-(5-bromo-pentyloxy)-2-hydroxymethyl-pyran-4-one 10 (1.90 g, 6.52 mmol) in DMF (7 mL) was added via syringe. This mixture was stirred at 50° C. for 2 h. Water (150 mL) was added and the mixture extracted with EtOAc (2×100 mL), washed with water (3×100 mL), brine (3×100 mL), dried over MgSO4, filtered and evaporated. The crude product was purified by column chromatography on silica using as eluent CH2Cl2:MeOH=95:5. 5-(5-(Quinazolin-4-yloxy)pentyloxy)-2-(hydroxymethyl)-4H-pyran-4-one 15 was obtained (0.61 g, 26% yield) as a pale yellow solid.
Workup
- stirringThis mixture was stirred at 50° C. for 2 h
- extractionthe mixture extracted with EtOAc (2×100 mL)
- washwashed with water (3×100 mL), brine (3×100 mL)
- dry with materialdried over MgSO4
- filtrationfiltered
- customevaporated
- customThe crude product was purified by column chromatography on silica using as eluent CH2Cl2
Sources & evidence
- ORD record
- ord-ec877a2919ae4c9ca88a301d964f4269
- Source dataset
- uspto-grants-2009_04
- Patent number
- US07514432B2
Reaction notes
Loading…