4693-91-8

clear light yellow liquid

The general procedure for the synthesis of 4-methoxyphenylacetyl chloride from 4-methoxyphenylacetic acid was as follows: 16.62 g (0.1 mol) of 4-methoxyphenylacetic acid was dissolved in 10 mL of benzene, followed by the slow addition of 29 mL (0.2 mol) of thionyl chloride to the solution. The reaction mixture was heated to reflux temperature and stirred continuously for 1 hour under this condition. Upon completion of the reaction, the residual thionyl chloride in the reaction solution and the concentrated solvent were removed by distillation under reduced pressure to afford 4-methoxybenzeneacetyl chloride (Compound I) as a liquid phase product in quantitative yield. The obtained product can be used for subsequent reaction without further purification.

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