Dichloromethane → 4-(Chloromethyl)benzoyl chloride
Reaction equation
Br[CH2:2][C:3]1[CH:11]=[CH:10]C(C(O)=O)=[CH:5][CH:4]=1.[C:12](Cl)(=O)[C:13]([Cl:15])=[O:14].[Cl:18]CCl>>[Cl:18][CH2:2][C:3]1[CH:11]=[CH:10][C:12]([C:13]([Cl:15])=[O:14])=[CH:5][CH:4]=1Participants
Procedure
A stirred suspension of 3.0 g (14 mmol) of 4-(bromomethyl)benzoic acid and 3.5 ml (41 mmol) of oxalyl chloride in 35 ml of dichloromethane was refluxed for 10 hours and cooled to room temperature. Evaporation afforded 4-(chloromethyl)benzoyl chloride as an oil which was used without purification. To a cooled (0° C.) solution of 2.6 g (14 mmol) of 4-(chloromethyl)benzoyl chloride and 2.0 g (18 mmol) of benzyl alcohol in 30 ml of dichloromethane was added 1.8 g (18 mmol) of triethylamine. The reaction was stirred at 0° C. for 0.2 hours, then at room temperature for an additional 1 hour and poured into 150 ml of EtOAc. The EtOAc layer was with three portions of water, dried over Na2SO4, filtered and evaporated. The crude product was flash chromatographed (5% EtOAc/hexanes) to give 0.7 g of product; m.p. 52°-54° C.
Workup
- temperaturewas refluxed for 10 hours
- customEvaporation
Sources & evidence
- ORD record
- ord-a495b8cc93784db3b397d36130a02ec5
- Source dataset
- uspto-grants-1994_07
- Patent number
- US05326905
Reaction notes
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