Dimethylformamide → 4-Chloro-6-methoxy-7-(2-methoxyethoxy)quinazoline

HRID 634665Notes

Reaction equation

HRID 634665 reaction equation
CN(C=O)C.[CH3:6][O:7][C:8]1[CH:9]=[C:10]2[C:15](=[CH:16][C:17]=1[O:18][CH2:19][CH2:20][O:21][CH3:22])[N:14]=[CH:13][NH:12][C:11]2=O.S(Cl)([Cl:26])=O>>[Cl:26][C:11]1[C:10]2[C:15](=[CH:16][C:17]([O:18][CH2:19][CH2:20][O:21][CH3:22])=[C:8]([O:7][CH3:6])[CH:9]=2)[N:14]=[CH:13][N:12]=1

Participants

4

Reactant 3

HCID 6228DimethylformamideHCID 24386Thionyl ChlorideHCID 135407708HCID 135407708, compound

Product 1

HCID 107306534-Chloro-6-methoxy-7-(2-methoxyethoxy)quinazolineYield 51%

Procedure

DMF (0.5 ml) was added to a mixture of 6-methoxy-7-(2-methoxyethoxy)-3,4-dihydroquinazolin-4-one (5.1 g, 20 mmol) in thionyl chloride (50 ml). The mixture was stirred and heated at reflux for 3 hours, allowed to cool and the excess thionyl chloride removed by evaporation. The residue was suspended in methylene chloride and washed with aqueous sodium hydrogen carbonate solution. The aqueous phase was extracted with methylene chloride and the combined extracts dried (MgSO4). The crude product was recrystallised from methylene chloride/hexane to give 4-chloro-6-methoxy-7-(2-methoxyethoxy)quinazoline (2.8 g, 51%) as a fine white solid.

Workup

  1. temperatureheated
  2. temperatureat reflux for 3 hours
  3. temperatureto cool
  4. customthe excess thionyl chloride removed by evaporation
  5. washwashed with aqueous sodium hydrogen carbonate solution
  6. extractionThe aqueous phase was extracted with methylene chloride
  7. dry with materialthe combined extracts dried (MgSO4)
  8. customThe crude product was recrystallised from methylene chloride/hexane

Sources & evidence

ORD record
ord-e6a14f08e87d4f609977d68254e39dec
Source dataset
uspto-grants-2001_02
Patent number
US06184225B2

Reaction notes

Loading…