Solvent‐Free Williamson Synthesis: An Efficient, Simple, and Convenient Method for Chemoselective Etherification of Phenols and Bisphenols
作者:Ahmad R. Massah、Masumeh Mosharafian、Ahamad R. Momeni、Hamid Aliyan、H. Javaherian Naghash、Mohamad Adibnejad
DOI:10.1080/00397910701316268
日期:2007.6.1
Etherification of phenols with dimethyl- and diethylsulfates and benzyl chloride was performed efficiently in the presence of a suitable solid base, NaHCO(3) or K(2)CO(3), under solvent-free conditions. The reaction proceeded rapidly at low temperature, and the corresponding ethers were obtained with high purity and excellent yield. Selective etherification of electron-poor phenols in the presence of electron-rich ones and also selective mono-etherification of bisphenols are the noteworthy advantages of this method. This method is environmentally friendly.