Abstract
Preparation of 1-formyl 1,1-dialkylmethylphosphonates is described. A carbanionic route is provided by the condensation of α-lithio α,α-disubstituted methylphosphonates with ethylformate whereas a carbocationic route provided by the acid catalyzed rearrangement of β,β-disubstituted epoxyethylphosphonates is re-evaluated.