Synthesis and pharmacological studies at the Gly/NMDA, AMPA and Kainate receptors of new oxazolo[4,5-c]quinolin-4-one derivatives bearing different substituents at position-2 and on the fused benzo ring
作者:F CALABRI、V COLOTTA、D CATARZI、F VARANO、O LENZI、G FILACCHIONI、C COSTAGLI、A GALLI
DOI:10.1016/j.ejmech.2005.03.017
日期:2005.9
compound was the 7-chloro-substituted derivative 1 (Ki=0.082 microM) which possesses a Gly/NMDA selectivity of 50- and 500-fold with respect to AMPA and KA receptors, respectively. Functional antagonism studies performed on some selected 2-mercapto compounds, at both AMPA and NMDA receptor-ion channels, assessed the antagonistic properties of these derivatives. SAR studies pointed out the importance
报道了新的恶唑并[4,5-c]喹啉-4-酮衍生物在Gly / NMDA,AMPA和海因酸盐受体上的合成及生物学评价。在2-位(巯基,羰基和甲基)和稠合的苯并环(氯原子和三氟甲基)上引入了不同的取代基。在本文报道的化合物中,2-巯基衍生物1-4显示出最高的Gly / NMDA亲和力,可与5,7-二氯尿嘧啶酸相比。活性最高的化合物是7-氯取代的衍生物1(Ki = 0.082 microM),其相对于AMPA和KA受体的Gly / NMDA选择性分别为50倍和500倍。在AMPA和NMDA受体离子通道上对某些选定的2-巯基化合物进行的功能拮抗研究评估了这些衍生物的拮抗特性。SAR研究指出了在恶唑并[4,5-c]喹啉-4-酮骨架的2位和3位同时存在富电子部分的重要性。实际上,3-sp2-氮原子在增强氢键中起着重要作用,而氢键是4-羰基氧可能与Gly / NMDA受体位点的精氨酸残基(R523)形成