ChemInform Abstract: Ring-Closing Metathesis on Deactivated Allyl-Phosphonates and -Phosphoramidates: Access to Dihydrophosphinine Oxides Bearing an Ester Group

The preparation of new allylphosphonates and allylphosphoramidates bearing alkoxycarbonyl substituents is described. Both P-based precursors were subjected to RCM. In this context, several Ru-based catalysts were tested and compared in order to prepare new oxa- and aza-dihydrophosphinine oxides. P-heterocycles and homodimers have been obtained depending on the nature of the catalyst and the reaction conditions. In addition, homodimers were converted into six-membered cyclic phosphonates and phosphoramidates under Ru-promoted conditions.