Synthesis of ethynylphosphonate esters. A novel organosilicon rearrangement
Abstract
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.