Synthesis and GABA uptake inhibitory properties of 6-aryl iminoxymethyl substituted nipecotic acids.

Nipecotic acid derivatives bearing an aryl iminoxymethyl side chain at the position 6 were synthesised and tested for their GABA uptake inhibitory properties. Contrarily to the N-substituted derivatives 2, 3 the introduction of the oxime function in the side chain of analogues of the active nipecotic derivative 4 does neither increase, nor maintain the activity.

Syntheses and GABA uptake properties of 6-ether- and 6-enol ether-substituted nipecotic acids.

6-aralkylether- and 6-arylenol-ether-substituted nipecotic acids were synthesized. These analogues are poor GABA uptake inhibitors. The electronegative region concept developed in the N-substituted nipecotic acid series cannot be transferred on the side chain of this series of 6-substituted analogues.