Stéréochimie de diéthylphosphono carbéthoxy-4 pyrrolidines. Étude par rmn du proton à haut champ (250 MHz) et du carbone (¹³C)

Abstract

A series of 2-diethylphosphono 4-carbethoxy pyrrolidines has been studied by 250 MHz 1 H nmr and 13 C nmr. A study of the chemical shifts allows us to establish the structures and the analysis of the 3 J HH , 3 J PH and 3 J PC coupling constants leads to designation of preferred conformations for these rings. Good agreement is noted between the angular dependence of these coupling constants and the dihedral angles. [Journal Translation]