Cd. Benham et al., THE SYNTHESIS OF PYRAZOLO[4,3-C]-ARYL[E]FUSED AND IMIDAZO[4,5-C]-ARYL[E]FUSED PYRIDINES AS STRUCTURAL ANALOGS OF 4-AMINONICOTINOATES, Bioorganic & medicinal chemistry letters, 5(21), 1995, pp. 2455-2460
A series of 4-aminobenzothienopyridine-3-carboxylates 4 to 10 has been
prepared and the SAR of these GABA(A) modulators discussed, Replaceme
nt of the 4-aminonicotinoate moiety by imidazo [4,5-c] ring fusion pro
vides potent bioisosteres 12 to 14.