Aromatic nucleophilic replacement. Part XIV. The mode of transmission of the inductive effect in the benzene ring and the relative activating power of the<sup>+</sup>NMe<sub>2</sub>O<sup>–</sup>,<sup>+</sup>NMe<sub>3</sub>, and NO<sub>2</sub>groups in aromatic nucleophilic replacement reactions
作者:C. W. L. Bevan、T. A. Emokpae、J. Hirst
DOI:10.1039/j29680000238
日期:——
The Arrhenius parameters for the reactions of 3-fluoro-4-nitro-, 4-fluoro-3-nitro-, 3-fluoro-5-nitro-, and 2-fluoro-4-nitro-NN-dimethylaniline N-oxides and 4-fluoro-3-nitro-, and 3-fluoro-5-nitro-phenyltrimethylammonium chlorides with methoxide ion in absolute methanol have been determined. The results are consistent with the operation of a small π-inductive effect and give the relative activating
Potential anxiolytic agents. 2. Improvement of oral efficacy for the pyrido[1,2-a]benzimidazole (PBI) class of GABA-A receptor modulators
作者:Bruce E Maryanoff、David F McComsey、Winston Ho、Richard P Shank、Barry Dubinsky
DOI:10.1016/0960-894x(96)00025-x
日期:1996.2
We have further explored the structure-activity relationships of pyrido[1,2-a]benzimidazole (PBI) derivatives (viz. prototype 1), a novel series of central GABA-A receptor modulators, with the intent of enhancing oral efficacy. A study involving the introduction of acidic or basic groups led to the identification of RWJ-38293 (3a) as a potential anxiolytic agent.