Synthesis of a 4-methylene-6-phosphabicyclo[1.1.0]hex-2-ene: A 1,4-dipole as a building block for novel phosphorus compounds containing the cyclopentadienyl skeleton

Abstract

The reaction of bis(pentamethylcyclopentadienyl)chlorophosphane with LiN(SiMe₃)₂ affords the novel 4-methylene-6-phosphabicyclo[1.1.0]hex-2-ene, acting as a 1,4-dipole in addition (cycloaddition) reactions; the X-ray structure of a 3a,4-dihydro-7H-phosphinine is reported.