Regioselective alkylation reactions of enamines derived from phosphane oxides - Synthesis of phosphorus substituted enamino esters, delta-amino-phosphonates, pyridone derivatives and pyrroles

alpha -Substituted (2-iminoalkyl)phosphane oxides were obtained from the az aenolates of imines or enamines and alkyl halides. The functionalized imine s or enamines thus obtained were used for the synthesis of delta -amino est ers, delta -amino phosphonates and heterocycles such as 3,4-dihydropyridin- 2-ones, 2-pyridones and pyrroles containing a phosphinyl substituent.