Abstract
A study to develop an efficient protocol for the solvent-free synthesis of a wide variety of highly substituted propargyl ethers and amines using alumina-sulfuric acid as a recyclable heterogeneous solid acid catalyst has been presented. This mild protocol tolerates a good number of acid-sensitive moieties and can be applicable to a diverse range of alcohols and amines accommodating a variety of substitution patterns. Moreover, the entire process is highly atom-efficient leaving the most innocuous material, namely water, as the sole by-product.
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