Carbon tetrabromide → 2-[4(2-bromo-ethoxy)-3,5-dimethyl-phenyl]-5-methoxy3H-quinazolin-4-one

HRID 591715Notes

Reaction equation

HRID 591715 reaction equation
O[CH2:2][CH2:3][O:4][C:5]1[C:10]([CH3:11])=[CH:9][C:8]([C:12]2[NH:21][C:20](=[O:22])[C:19]3[C:14](=[CH:15][CH:16]=[CH:17][C:18]=3[O:23][CH3:24])[N:13]=2)=[CH:7][C:6]=1[CH3:25].C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.C(Br)(Br)(Br)[Br:46]>CN(C)C=O>[Br:46][CH2:2][CH2:3][O:4][C:5]1[C:10]([CH3:11])=[CH:9][C:8]([C:12]2[NH:21][C:20](=[O:22])[C:19]3[C:14](=[CH:15][CH:16]=[CH:17][C:18]=3[O:23][CH3:24])[N:13]=2)=[CH:7][C:6]=1[CH3:25]

Participants

5

Reactant 3

HCID 11205Carbon tetrabromideHCID 11776TriphenylphosphineHCID 1360380042-[4-(2-hydroxy-ethoxy)-3,5-dimethyl-phenyl]-5-methoxy-3H-quinazolin-4-one

Product 1

HCID 1363479992-[4(2-bromo-ethoxy)-3,5-dimethyl-phenyl]-5-methoxy3H-quinazolin-4-one

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Procedure

To a solution of 2-[4-(2-hydroxy-ethoxy)-3,5-dimethyl-phenyl]-5-methoxy3H-quinazolin-4-one (1.10 g, 3.20 mmol) in anhydrous N,N-dimethylformamide (16 mL) were added triphenylphosphine (0.92 g, 3.50 mmol) and carbontetrabromide (1.17 g, 3.50 mmol). The reaction mixture was stirred at room temperature for 16 hours. DMF was removed under reduced pressure. The residue was purified by column chromatography (silica gel 230-400 mesh; 3% methanol in dichloromethane as eluent) to give 2-[4(2-bromo-ethoxy)-3,5-dimethyl-phenyl]-5-methoxy3H-quinazolin-4-one as an off-white solid. Yield: 0.60 g (46%).

Workup

  1. customDMF was removed under reduced pressure
  2. customThe residue was purified by column chromatography (silica gel 230-400 mesh; 3% methanol in dichloromethane as eluent)

Sources & evidence

ORD record
ord-88b42f8ccfd64927b31870610b2638f4
Source dataset
uspto-grants-2016_01
Patent number
US09238640B2

Reaction notes

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