Intramolecular [3+2] Cycloaddition of a Nitrilium Phosphane Ylide Complex to theP-Phenyl Group of a Wittig Ylide

Abstract

Terminal addition of an electrophilic phosphanediyl complex to the nitrile-nitrogen atom of a Wittig ylide yields the nitrilium phosphane ylide complex I as an intermediate. Intramolecularly trapping of I by a [3+2] cycloaddition with a P-phenyl group leads to a bowl-shaped, coordinatively bonded, novel tricycle.