[Bis(2-methoxyethyl)amino]sulfur Trifluoride, the Deoxo-Fluor Reagent:  Application toward One-Flask Transformations of Carboxylic Acids to Amides

The use of the Deoxo-Fluor reagent is a versatile method for acyl fluoride generation and subsequent one-flask amide coupling. It provides mild conditions and facile purification of the desired products in good to excellent yields. We have explored the utility of this reagent for the one-flask conversion of acids to amides and Weinreb amides and as a peptide-coupling reagent.