从甲喹酮和超越:6-构效关系,7-和8-取代的2,3-二苯基-喹唑啉-4(3 H ^) -酮和在推定的结合喹唑啉-4-的模式硅铝预测(3 ħ)-作为GABA A受体的正变构调节剂
摘要:
甲基苯二甲酮(2-甲基-3-(邻甲苯基)-喹唑啉-4(3 H)-one,MTQ)是GABA A受体(GABA A Rs)的中度有效正变构调节剂(PAM )。在先前的结构-活性关系(SAR)研究中,研究了喹唑啉-4(3 H)-一个支架中2-和3-取代基的重要性,确定了几种有效的GABA A R PAM,包括2,3-二苯基喹唑啉- 4(3 H)-1(PPQ)和3-(2-氯苯基)-2-苯基喹唑啉-4(3 H)-1(Cl-PPQ)。在这里,PPQ被用作喹唑啉4(3 H中的6、7和8个取代基的SAR研究的先导)-通过合成和功能表征36种不同GABA A R亚型的PPQ类似物。尽管没有一个新的类似物比PPQ具有更强的效力或在测试的GABA A Rs上显示出明显的亚型选择性,但从这项研究中提取了一些有趣的SAR观察结果。在一个在硅片的研究中,在跨膜MTQ,PPQ,和Cl-PPQ的推定的结合模式β 2 (+)
Mechanochemical Synthesis of Substituted 4H-3,1-Benzoxazin-4-ones, 2-Aminobenzoxazin-4-ones, and 2-Amino-4H-3,1-benzothiazin-4-ones Mediated by 2,4,6-Trichloro-1,3,5-triazine and Triphenylphosphine
A mild and convenient approach for the synthesis of 2-substituted 4H-3,1-benzoxazin-4-ones, 2-aminobenzoxazin-4-ones, and 2-amino-4H-3,1-benzothiazin-4-ones under solvent-assisted grinding is reported. In the presence of 2,4,6-trichloro-1,3,5-triazine and catalytic triphenylphosphine, cyclodehydration of N-substituted anthranilic acid derivatives proceeded rapidly within minutes at room temperature
A convergent microwave assisted synthesis of 4-amino-N-(4-oxo-2-substituted-4H-quinazolin-3-yl)benzenesulfonamide derivatives
作者:Chandresh L. Jagani、Natvar A. Sojitra、Satish F. Vanparia、Tarosh S. Patel、Ritu B. Dixit、Bharat C. Dixit
DOI:10.3998/ark.5550190.0012.916
日期:——
An optimization of Grimmel’s method under microwave irradiation is reported here for the first time to synthesize 4-amino-N-(4-oxo-2-substituted-4H-quinazolin-3-yl)benzenesulfonamidederivatives. The method was successfully applied for the synthesis of 2-alkyl and 2-aryl substituted derivatives. However, unexpected results were obtained when the same protocol was applied for 2-styryl-substituted quinazolinones
作者:Murat Bozdag、Ahmed M. Alafeefy、Daniela Vullo、Fabrizio Carta、Nurcan Dedeoglu、Abdul-Malek S. Al-Tamimi、Nabila A. Al-Jaber、Andrea Scozzafava、Claudiu T. Supuran
DOI:10.1016/j.bmc.2015.11.023
日期:2015.12
Three series of sulfonamides incorporating long, bulky tails were obtained by applying synthetic strategies in which substituted anthranilic acids, quinazolines and aromatic sulfonamides have been used as starting materials. They incorporate long, bulky diamide-, 4-oxoquinazoline-3-yl-or quinazoline-4-yl moieties in their molecules, and were investigated for the inhibition of four physiologically relevant carbonic anhydrase (CA, EC 4.2.1.1) isoforms, the cytosolic human (h) hCA I and II, as well as the transmembrane hCA IX and XII. Most of the new sulfonamides showed excellent inhibitory effects against the four isoforms, with K(I)s of 7.6-322 nM against hCA I, of 0.06-85.4 nM against hCA II; of 6.7-152 nM against hCA IX and of 0.49-237 nM against hCA XII; respectively. However no relevant isoform-selective behavior has been observed for any of them, although hCA II and XII, isoforms involved in glaucoma-genesis were the most inhibited ones. The structure-activity relationship for inhibiting the four CAs with these derivatives is discussed in detail. (c) 2015 Elsevier Ltd. All rights reserved.