THE CYCLOADDITION OF DIETHYL CHLOROPHOSPHITE WITH NORBORNADIENE - SYNTHESIS AND CRYSTAL-STRUCTURE OF THE CYCLOADDUCT

In the presence of Lewis acids, diethyl phosphorochloridite reacts wit h norbornadiene to afford the tetracyclic phosphinate ester 3. The rea ction is believed to involve formation of phosphenium ions stabilized only by alkoxy substituents. The cycloadduct of the reaction was chara cterized by its spectral data, by single crystal diffraction analysis of the parent acid, and P-31 and Al-27 nmr experiments.