Thia-Wittig-like Reactions as a New Route for the Stereoselective Synthesis of (Z)-Fluoroalkenoates

Stereoselective syntheses of (Z)-fluoroalkenoates 3ag 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.