Development of Selective Ligands for Benzodiazepine Receptor Subtypes by Manipulating the Substituents at Positions 3- and 7- of Optically Active BzR Ligands
摘要:
Two series of analogs of the optically active alpha5 subtype selective imidazobenzodiazepine 20 have been prepared. The framework constrained analogs were synthesized by variation of the C (3) ethyl ester function 20 to either t-butyl 7 or 2, 2, 2-trifluoroethyl 14. In both cases receptor binding was decreased; as well as alpha5 selectivity. In the second series the 7-acetylenyl function in 14 was varied over the range vinyl, 2-furyl, 2-thienyl and 2-phenyl. Again receptor binding was maintained in most cases; however, alpha5 selectivity was not increased. The significance of this in regard to occupation of lipophilic regions L-Di vs L-2 in the pharmacophore/receptor model of the BzR is discussed.
Development of Selective Ligands for Benzodiazepine Receptor Subtypes by Manipulating the Substituents at Positions 3- and 7- of Optically Active BzR Ligands
摘要:
Two series of analogs of the optically active alpha5 subtype selective imidazobenzodiazepine 20 have been prepared. The framework constrained analogs were synthesized by variation of the C (3) ethyl ester function 20 to either t-butyl 7 or 2, 2, 2-trifluoroethyl 14. In both cases receptor binding was decreased; as well as alpha5 selectivity. In the second series the 7-acetylenyl function in 14 was varied over the range vinyl, 2-furyl, 2-thienyl and 2-phenyl. Again receptor binding was maintained in most cases; however, alpha5 selectivity was not increased. The significance of this in regard to occupation of lipophilic regions L-Di vs L-2 in the pharmacophore/receptor model of the BzR is discussed.
Development of Selective Ligands for Benzodiazepine Receptor Subtypes by Manipulating the Substituents at Positions 3- and 7- of Optically Active BzR Ligands
作者:Xiaoyan Li、Jianming Yu、John R. Atack、James M. Cook
DOI:10.1007/s00044-004-0033-7
日期:2004.6
Two series of analogs of the optically active alpha5 subtype selective imidazobenzodiazepine 20 have been prepared. The framework constrained analogs were synthesized by variation of the C (3) ethyl ester function 20 to either t-butyl 7 or 2, 2, 2-trifluoroethyl 14. In both cases receptor binding was decreased; as well as alpha5 selectivity. In the second series the 7-acetylenyl function in 14 was varied over the range vinyl, 2-furyl, 2-thienyl and 2-phenyl. Again receptor binding was maintained in most cases; however, alpha5 selectivity was not increased. The significance of this in regard to occupation of lipophilic regions L-Di vs L-2 in the pharmacophore/receptor model of the BzR is discussed.