Nonstabilized Ylides Research Articles

N-Methylpiperidine N-oxide as a source of nonstabilized ylide: a new and efficient route to octahydroindolizine derivatives

Les indolizidines sont obtenues par lithiation de l'amine oxyde du titre suivie d'addition d'un compose ethylenique

A New Route to Hexahydropyrrolizines Derivatives via Nonstabilized Ylide Generated from N-Methylpyrrolidine N-Oxide

A New Route to Hexahydropyrrolizines Derivatives via Nonstabilized Ylide Generated from N-Methylpyrrolidine N-Oxide

Study of some aliphatic ammonium ylides by semiempirical and ab initio methods: Structure and charge distribution

Structure of, and charge distribution in, some aliphatic ammonium ylides were determined by quantum chemical methods (CNDO/2, INDO, MINDO/2, PCILO, ab initio-STO-3G and 4-31G bases). Non-stabilized ylides were found to have pyramidal arrangement of bonds on the ylide carbon whereas the stabilized ylides have a planar arrangement. The charge distribution in stabilized ylides indicates a significant transfer of the negative charge from the ylide carbon to the electronegative groups. The calculated dipole moments for the previously prepared compounds, as well as for the derivatives VII and X, described in this paper, agree well with the experimental value.