1, 5-Disubstituted and 5-monosubstituted aminomethyltetrazole derivatives derived from glycine were synthesized employing a TMSN3-modified variant of the Ugi reaction as a key step. All compounds were evaluated regarding their inhibitory potency and subtype selectivity at the four murine GABA transporter subtypes mGAT1–mGAT4. Though none of the 5-monosubstituted tetrazoles turned out to inhibit [3H] GABA uptake to a significant ...