2,5-DIMETHOXYBENZOYL CHLORIDE Chemical Properties

Melting point:

53-54 °C(Solv: ligroine (8032-32-4))

Boiling point:

179°C/10mm

Density 

1.224±0.06 g/cm3(Predicted)

CAS DataBase Reference

17918-14-8(CAS DataBase Reference)

Safety Information

HS Code 

2918999090

2,5-DIMETHOXYBENZOYL CHLORIDE Usage And Synthesis

Preparation

AlCl3 (4.0 g, 30 mmol) was suspended in dichloromethane (30 mL). To this mixture, a solution of 1,4- dimethoxybenzene (1.38 g, 10 mmol) and triphosgene (5.94 g, 20 mmol) in dichloromethane (30 mL) was added dropwise over a period of 30 min. The resulting mixture was stirred under reflux for 7 days. It was then poured into crushed ice/ water (50 mL) and stirred with pyridine (0.5 mL) at 0 ℃ for 10 min. The layers were separated and the aqueous phase was extracted with dichloromethane (2 ×20 mL). The combined organic layers were washed with ice-cold 0.5 m HCl (30 mL) and with ice-cold water (2×10 mL), and dried over sodium sulfate. The solvent was evaporated in vacuo and the residue was purified by chromatography on silica gel, eluting with hexane/ethyl acetate (4:1→3:1→2:1→1:1), to afford 1.23 g (60%) of 2,5-dimethoxybenzoyl chloride.

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