Abstract
The catalyst- and solvent-free reaction between pyridines, alkyl propiolates, and bis(fluoroalkyl) phosphonates occurs under mild conditions (20–52°C, 1–15h) to stereo- and regioselectively afford bis(polyfluoroalkoxy)phosphoryl-(E)-N-alkoxycarbonylethenyl- 1,2- or 1,4-dihydropyridines in 65–80% yield depending on the structure of the initial pyridine or fluoroalkylphosphonate and the reaction conditions.
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