Synthesis and Evaluation of 6,11-Ethanohexahydrobenzo[b]quinolizidines: A New Class of Noncompetitive N-Methyl-D-aspartate Antagonists
摘要:
The synthesis and in vitro and in vivo evaluation of 12,13-cycloalkyl-6,11-ethanobenzo[b]quinolizidines, a new class of noncompetitive N-methyl-D-aspartate (NMDA) antagonists acting at the PCP site on the NMDA receptor complex, is reported. Structure-activity relationship studies led to the identification of 10-hydroxy-(6 alpha,11 alpha,11 alpha beta,12R*,13S*)-1,15,16-decahydro-12H-6,11[1',2']-endo-cyclopenta-2H-pyrido[1,2-b]isoquinoline hydrobromide (5h) and 9-hydroxy-(6 alpha,11 alpha,11 alpha beta,12R*,13S*)-1,3,4,6,11,11a,13,14,15,16-decahydro-12H-6,11[1',2']-endo-cyclopenta-2H-pyrido[1,2-b]isoquinoline hydrobromide(5i), the most potent members of this series with K-i values of 2.3 +/- 0.2 and 2.3 +/- 0.5 nM, respectively. Molecular modeling studies revealed that this series of compounds occupies both lipophilic sites of the Andrews PCP receptor model and shares structural features which are common to other classes of known noncompetitive NMDA antagonists such as MK-801.
1-Hetero substituted 6,11-ethano-6,11-dihydrobenzo[b]quinolizinium salts, pharmaceutical compositions containing them, and methods for the treatment or prevention of neurodegenerative disorders or neurotoxic injuries utilizing them.
Substituted 6,11-ethano-6,11-dihydrobenzo[b] quinolizinium salts and
申请人:Sterling Winthrop Inc.
公开号:US05554620A1
公开(公告)日:1996-09-10
Substituted 6,11-ethano-6,11-dihydrobenzo[b]quinolizinium salts, pharmaceutical compositions containing them, and methods for the treatment of neurodegenerative disorders or neurotoxic injuries utilizing them, wherein the substituted 6,11-ethano-6,11-dihydrobenzo[b]quinolizinium salts have the formula: ##STR1## wherein: R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5, R.sup.6, R.sup.7, X and p are as defined in the specification.
替代的6,11-乙烷-6,11-二氢苯并[b]喹啉盐,含有它们的药物组合物,以及利用它们治疗神经退行性疾病或神经毒性损伤的方法,其中替代的6,11-乙烷-6,11-二氢苯并[b]喹啉盐具有以下结构式:##STR1## 其中:R.sup.1、R.sup.2、R.sup.3、R.sup.4、R.sup.5、R.sup.6、R.sup.7、X 和 p 如规范中所定义。
Identification, Synthesis, and Characterization of a Unique Class of N-Methyl-D-aspartate Antagonists. The 6,11-Ethanobenzo[b]quinolizinium Cation
作者:John P. Mallamo、William G. Earley、Virendra Kumar、Chakrapani Subramanyam、John A. Jr. Dority、Matthew S. Miller、Diane L. DeHaven-Hudkins、Brian Ault、John L. Herrmann
DOI:10.1021/jm00052a003
日期:1994.12
A series of novel N-methyl-D-aspartate antagonists acting at the phencyclidine site has been identified. Compound 2 has a Ki = 8 +/- 1 nM (vs [3H]thienylcyclidine, [3H]TCP) as a mixture of enantiomers. Resolution and further testing indicate that (-)-2, Ki = 4 +/- 0.7 nM, is a potent and selective TCP site ligand with neuroprotective activity in cultured neurons in the presence of excitotoxic concentrations
Selective ratiometric detection of mercury(ii) ions in water with an acridizinium-based fluorescent probe
作者:Maoqun Tian、Heiko Ihmels
DOI:10.1039/b821830g
日期:——
The integration of a selective Hg2+receptor unit, 1,4-dioxa-7,13-dithia-10-azacyclopentadecane, into the 9-aminoacridizinium fluorophore provides a fluorescent probe which allows a selective ratiometric detection of Hg2+ in water.
Solvent Effects on a Diels−Alder Reaction Involving a Cationic Diene: Consequences of the Absence of Hydrogen-Bond Interactions for Accelerations in Aqueous Media
作者:Gerben K. van der Wel、Jan W. Wijnen、Jan B. F. N. Engberts
DOI:10.1021/jo9614248
日期:1996.1.1
on the accelerations of Diels-Alder reactions in water and highly aqueous mixed solvent systems, second-order rate constants for the Diels-Alder reaction of acridizinium bromide (1a) with cyclopentadiene (CP) have been measured in aqueous media and organic solvents. Only modest rate accelerations were found in water-rich media. This is attributed to the absence of hydrogen-bonding groups in the reactants