The synthesis of ethynylphosphonate esters in high yield is described. Di-isopropyl trimethylsilylethynylphosphonate, an intermediate in the synthesis of the di-isopropyl ester, undergoes a novel thermal rearrangement with loss of propene and migration of silicon from carbon to oxygen.
D. W. Burt and P. Simpson, J. Chem. Soc. C, 1969, 2273 DOI: 10.1039/J39690002273
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