Efficient Synthesis of Stable Phosphonate Ylides and Phosphonate Esters: Reaction Between Activated Acetylenes and Triphenylphosphite in the Presence of Sulfonamide and Heterocyclic NH-Acids
efficient synthesis of stable phosphonate ylides and phosphonateesters is described via a one-pot reactionbetween activated acetylenes and triphenylphosphite in the presence of sulfonamides and heterocyclic NH-acids. Single X-ray diffraction analysis and NMR studies were used in characterizing the ylides and phosphonateester products. Dynamic NMR studies performed on a phosphonate ylide allowed the calculation