10.1055/s-0037-1611898
The research aims to develop a practical and transition-metal-free etherification protocol for synthesizing deuterated ethers, which have significant applications in pharmaceutical discoveries and developments. The study explores the nucleophilic etherification of aryl alkyl ethers and thioethers using deuterated alcohols in the presence of potassium tert-butoxide (KOt-Bu) under mild reaction conditions. The researchers found that a wide range of sterically bulky deuterated alcohols and aryl ethers, including methoxybenzonitriles and aryl alkyl thioethers, were suitable for this transformation, achieving yields up to 97%. Mechanistic studies suggested that the reaction proceeds via a nucleophilic aromatic substitution pathway. The developed method provides a simple yet effective technique for generating deuterated ethers, which are difficult to prepare using traditional Williamson etherification, and is expected to have broad applications in the pharmaceutical field.