An Efficient One-Pot Preparation of 2,4-Pentadienoic Esters from α,β-Unsaturated Aldehydes

All articles of this category α,β-Unsaturated aldehydes react with monoalkyl malonates in pyridine with a catalytic amount of dimethylaminopyridine (DMAP) in a regio-and stereoselective process to yield almost exclusively 2,4-pentadienoic esters with essentially (and in many cases exclusively) the 2 E -stereochemistry.