(Diethylamino)sulfur trifluoride (DAST) is an efficient nucleophilic fluorinating reagent used for a variety of compounds including alcohols, thioethers, alkenols and cyanohydrins. It also serves as a catalyst for Friedel-Crafts allylation reaction using tertiary cyclopropyl silyl ethers and in the rearrangement of homoallylic alcohols to unsaturated aldehydes. It plays an important role for gem difluorination of ketopipecolinic acids.
New fluorinating reagents: Dialkylaminosulfur fluorides. 
DAST-Mediated Regioselective Anomeric Group Migration in Saccharides. 
DAST-mediated cyclization of α,α-disubstituted-α-acylaminoketones: efficient and divergent synthesis of unprecedented heterocycles. 
An improved method for the synthesis of protected glycosyl fluorides from thioglycosides using N,N-diethylaminosulfur trifluoride (DAST). 
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