N,N-Dialkyl-β-amino alcohols were enantiospecifically and regioselectively rearranged by using N,N-diethylaminosulfur trifluoride (DAST) to give optically active β-fluoroamines in excellent yields and enantiomeric excesses. This rearrangement was applied to the enantioselectivesynthesis of LY503430, a potential therapeutic agent for Parkinson’s disease.
LY503430, an optically active β-fluoroamine, is a potential therapeutic agent for the Parkinson's disease. Different strategies have been studied to synthesize this molecule using a regioselective and stereospecific rearrangement of β-aminoalcohols into β-fluoroamines induced by DAST. This reaction allowed the synthesis of LY503430 with an excellent enantiomeric excess.