[GRAPHICS]Stereoselective syntheses of (Z)-fluoroalkenoates 3a-g have been developed in three steps from the readily available fluorosulfide 5 and aldehydes, This preparation, involving a Durst reaction, was highly stereoselective and led to fluoroalkenes in 50-60% overall yields, without purification of intermediates.
tert-Butylsulfinyl-fluoroacetate: versatile reagent for the preparation of fluoroethylidenoate derivatives
The preparation of (Z)-α-fluoroalkenoates from readily available methyl-tert-butylsulfanyl- or tert-butylsulfinylfluoroacetate 1 or 5 is described. This short synthesis, based on a direct extrusion of SO2 from β-hydroxysulfoxides, presents a moderate to high selectivity and affords (Z)-α-fluoroalkenoates in 40–81% overall yields without purifications of the intermediates. This procedure was applied