A number of condensed azines, mostly belonging to the families of indeno-fused pyridazines (1), pyrimidines (13), and 12,4-triazines (4, 5), were synthesized and evaluated in vitro as monoamine oxidase (MAO) A and B inhibitors. Most of them showed higher inhibition potency toward MAO-B, the most effective one being 3-(3-nitrophenyl)-9H-indeno[1,2-e] [1,2,4]triazin-9-one (4c), which displayed an IC50 value of 80 nM and proved to be I 0-fold more potent than its [2,1-e] fusion isomer 5. Replacing the 3-phenyl group of the known indeno[12-c]pyridazin-5-one MAO-B inhibitors with a flexible phenoxymethyl group enhanced the inhibitory potency. The inhibition data highlighted the importance of the aza-heterocyclic scaffold in affecting the MAO isoform selectivity. The 3-phenyl derivatives with type 1, 4, and 5 scaffolds were inhibitors of MAO-B with little or no MAO-A effect, whereas 2- or 3-phenyl derivatives of type 2 and 3 pyrimidine-containing fusion isomers inhibited both isoenzymes with a structure-dependent preference toward MAOA.
Design, Synthesis, and 3D QSAR of Novel Potent and Selective Aromatase Inhibitors
作者:Francesco Leonetti、Angelo Favia、Angela Rao、Rosaria Aliano、Anja Paluszcak、Rolf W. Hartmann、Angelo Carotti
DOI:10.1021/jm049535j
日期:2004.12.1
imidazole or triazole ring linked to a fluorene (A), indenodiazine (B), or coumarin scaffold (C) are reported. Properly substituted coumarin derivatives displayed the highest aromatase inhibitory potency and selectivity over 17-alpha-hydroxylase/17-20 lyase. The modeling of the aromatase inhibition data by Comparative Molecular Field Analysis (CoMFA/GOLPE 3D QSAR approach) led to the development of a PLS
报道了一系列新的芳香酶抑制剂的设计,合成和生物学评估,这些抑制剂带有与芴(A),茚并二嗪(B)或香豆素骨架(C)连接的咪唑或三唑环。与17-α-羟化酶/ 17-20裂解酶相比,正确取代的香豆素衍生物显示出最高的芳香酶抑制能力和选择性。通过比较分子场分析(CoMFA / GOLPE 3D QSAR方法)对芳香化酶抑制数据进行建模,导致了具有良好拟合和预测能力(n = 22,ONC = 3,r(2)= 0.949, s = 0.216,而q(2)= 0.715)。
Synthesis and Monoamine Oxidase Inhibitory Activity of 3-Substituted 5<i>H</i>-Indeno[1,2-<i>c</i>]pyridazines
The one-pot synthesis of nine 5H-indeno[1,2-c]pyridazines is described. These compounds are shown to be potent, reversible inhibitors of monoamine oxidase B (MAO-B) with little or no effect on monoamine oxidase A (MAO-A). Qualitative structure-activityrelations indicate that the MAO-B inhibitory activity is strongly influenced by electronic and bulk properties of substitutents.
描述了九种5 H-茚并[1,2- c ]哒嗪的一锅合成。这些化合物显示为单胺氧化酶B(MAO-B)的有效可逆抑制剂,对单胺氧化酶A(MAO-A)几乎没有影响。定性的结构-活性关系表明,MAO-B抑制活性受取代基的电子和本体性质的强烈影响。