Synthesis of Chloroesters by the Cleavage of Cyclic and Acyclic Ethers using La(NO3)3 · 6H2O as a Mild and Efficient Catalyst under Solvent‐Free Conditions

The use of tin(IV) chloride to selectively cleave benzyl esters over benzyl ethers and benzyl amines

Benzyl esters are cleaved upon reaction with SnCl4, resulting in isolation of the corresponding carboxylic acid. Importantly, benzyl ethers, amines, and amides do not undergo debenzylation under these conditions, nor do a variety of other common protecting groups for alcohols, thereby rendering SnCl4 selective amongst Lewis acids. The scope, tolerance, and limitations of the strategy are demonstrated through the analysis of several multifunctional substrates, including those bearing Cbz groups.

Synthesis of n-alkyl terminal halohydrin esters from acid halides and cyclic ethers or thioethers under solvent- and catalyst-free conditions

An efficient and eco-friendly protocol has been developed for the preparation of n-alkyl terminal halohydrin esters under solvent- and catalyst-free conditions in high yields and with a broad substrate scope.