4-Quinazolinones: synthesis and reduction of prostaglandin E2 production
摘要:
We synthesized and evaluated the anti-inflammatory activity of a series of 4-quinazolinone derivatives. Two approaches were used to yield the title compounds. A first group of quinazolinone derivatives was obtained by the appropriate substituted anthranilates. A second group of quinazolinone compounds was prepared through the benzoxazin-4-ones intermediate. The pharmacological results reveal that the synthesized derivatives exhibit a significant anti-inflammatory effect in an experimental ocular inflammation model. In fact, all the tested compounds lowered the prostaglandin E-2 (PGE(2)) production with respect to the control group (P < 0.05). The 3-cyclohexyl-6-chloro-quinazolin-4(3H)-one and 3-cyclohexyl-quinazolin-4(3H)-one derivatives were the most active compounds. These compounds significantly reduced PGE(2) levels even more than the reference drug tolmetin and significantly lower protein concentration and polymorphonuclear leukocytes number compared to the control group (P < 0.05). Therefore, these compounds may be useful to prevent ocular inflammatory reactions. (C) 1999 Elsevier Science S.A. All rights reserved.
Base-promoted ring opening of 3-chlorooxindoles for the construction of 2-aminoarylthioates and their transformation to quinazolin-4(3<i>H</i>)-ones
作者:Tej Narayan Poudel、Hari Datta Khanal、Yong Rok Lee
DOI:10.1039/c8nj00195b
日期:——
Cesium carbonate-promoted synthesis of diverse 2-aminoarylthioatesviaring opening of 3-chlorooxindoles with thiols, and their synthetic applications is demonstrated.
Discovery of molluscicidal and cercaricidal activities of 3-substituted quinazolinone derivatives by a scaffold hopping approach using a pseudo-ring based on the intramolecular hydrogen bond formation
作者:Wei Guo、Lv-Yin Zheng、Yong-Dong Li、Ren-Miao Wu、Qiang Chen、Ding-Qiao Yang、Xiao-Lin Fan
DOI:10.1016/j.ejmech.2016.03.037
日期:2016.6
in current Schistosomiasis control. A pseudo-ring formed from salicylanilide by an intramolecular hydrogen bond led to the discovery of 3-substituted quinazolinone derivatives which showed a potent molluscicidal and cercaricidal activities.
A novel synthesis of 2-unsubstituted 4(3H)-quinazolino- nes is described. Heating a mixture of an anthranilic acid and an iso- cyanide under solvent-free conditions afforded the title compounds in good to excellent yields.