Palladium‐catalysed O‐Allylation of α‐Hydroxyphosphonates: An Expedient Entry into Phosphono‐oxaheterocycles

We report here an unprecedented palladium-catalysed O-allylation of α-hydroxyphosphonates. The method was eventually included in a sequential Pudovik/Tsuji-Trost type O-allylation/Ring-Closing Metathesis to afford a variety of phosphorylated heterocycles of various sizes ranging from 5 to 16 starting from readily available aldehydes.