Abstract

Abstract N,N,N′,N′-Tetramethylchloroformamidinium chloride, prepared easily from N,N,N′,N′-tetramethylurea and oxalyl chloride, is found to be an efficient condensation reagent for an esterification of carboxylic acids with alcohols under mild conditions in one-pot procedure, and the reagent is applied to the lactonization for macrolide synthesis from ω-hydroxycarboxylic acids.

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