4-Chlorobutyryl chloride → HCID 57245589, compound
Reaction equation
[Cl:1][CH2:2][CH2:3][CH2:4][C:5](Cl)=[O:6].[Al+3].[Cl-].[Cl-].[Cl-].[C:12]1([CH2:18][C:19]([O:21][CH2:22][CH:23]([CH2:28][CH3:29])[CH2:24][CH2:25][CH2:26][CH3:27])=[O:20])[CH:17]=[CH:16][CH:15]=[CH:14][CH:13]=1>>[Cl:1][CH2:2][CH2:3][CH2:4][C:5]([C:15]1[CH:16]=[CH:17][C:12]([CH2:18][C:19]([O:21][CH2:22][CH:23]([CH2:28][CH3:29])[CH2:24][CH2:25][CH2:26][CH3:27])=[O:20])=[CH:13][CH:14]=1)=[O:6]Participants
4
Conditions
- Temperature
- 35 °C
Procedure
Mix chlorobutyryl chloride (16.9 g) and AlCl3 (29.3 g) at room temperature. Add 2-phenylacetic acid, 2-ethylhexyl ester (27.6 g), keeping the temperature below 10° C. Heat at 35° C. for 24 hours, quench in ice water (200 g). Separate the organic phase, dry (MgSO4) and evaporate the solvent in vacuo. Dilute the residue with ethanol (150 mL), add hydrogen chloride (5 g) and heat to 75° C. After 2.5 hours, add another 5 g of hydrogen chloride and stir at 75° C. for 24 hours. Evaporate the solvent in vacuo to give the title compound.