Cyclization of N-acylanthranilic acids with Vilsmeier reagents. Chemical and structural studies
作者:Jan Bergman、Claes Stålhandske
DOI:10.1016/0040-4020(95)01035-1
日期:1996.1
Vilsmeier reagents, generated from e.g. N, N-dimethylformamide and oxalyl chloride, react with N-acetylanthranilic acid to produce the 2-(2′-dimethylamino)ethenyl-4H-3,1-benzoxazin-4-one13a.. N-phenylacetylanthranilic acid similarly gave 2-(2′-dimethylamino-1′-phenyl)ethenyl-4H-3,1-benzoxazin-4-one6a, whose structure has been determined by X-ray crystallography. The benzoxazinone 6a could readily be
维尔斯迈尔试剂,例如从产生Ñ,Ñ二甲基甲酰胺和草酰氯,与之反应Ñ -acetylanthranilic酸,以产生2-(2'-二甲基氨基)乙烯基-4H-3,1-苯并恶嗪-4-酮13A .. ñ -苯基乙酰基邻氨基苯甲酸类似地给出了2-(2'-二甲基氨基-1'-苯基)乙烯基-4 H -3,1-苯并恶嗪-4-酮6a,其结构已经通过X射线晶体学确定。苯并恶嗪酮6a中可以很容易地转化为稠合的杂环系统,从而例如图13A和水合肼,得到吡唑并[5,1-B] -4 ħ -喹唑啉20A。N的反应-乙酰化的邻氨基苯甲酸和草酰氯单独给出了稠合的恶唑烷-4,5-二酮24。通过X射线晶体学确定了一个代表24a的结构。消除CO + CO 2后,24a的热解以定量收率得到2-苄基-4H-3,1-苯并恶嗪-4-one 7。
Synthesis of some new glutamine linked 2,3-disubstituted quinazolinone derivatives as potent antimicrobial and antioxidant agents
作者:M. K. Prashanth、H. D. Revanasiddappa
DOI:10.1007/s00044-012-0269-6
日期:2013.6
streak dilution method. The compound 5b was found to exhibit the most potent in vitro anti-microbial activity. When tested for their antioxidant activity, compounds 5i and 5l showed potentradical scavenging activity, while compound 5g had moderate effect against 2,2-diphenyl-1-picrylhydrazyl, hydroxyl, nitric oxide, and superoxide radical scavenging assays. These results suggest that, the three quinazolinone
Fungicidal Activity of<i>N</i>-Benzoylanthranilates and Related Compounds
作者:Osamu Kirino、Shigeo Yamamoto、Toshiro Kato
DOI:10.1080/00021369.1980.10864289
日期:1980.9
Methyl N-(substituted benzoyl)anthranilates were found to possess inhibitory activity against the powdery mildew of cucumber caused by Sphaerotheca fuliginea. Both the anthranilate and the N-benzoyl moieties were essential for this type of fungicidal activity. Substitution at the 2- and 4-positions of the N-benzoyl group was unfavorable to the activity except for the 4-methoxy group. Substitution at the 3-position varied the fungicidal activity to various extents. The variation in the activity of 3-substituted derivatives was analyzed quantitatively with substituent parameters and regression analysis indicating that the variation in the steric dimension of substituents was most responsible for the activity.
Herein, we describe a copper photoredox catalyzedsynthesis of acetamide via regioselective C–Ncoupling of arylamines with terminal alkynes using molecular oxygen (O2) as an oxidant at room temperature under visible light irradiation (47 examples). Unique simultaneous formation of both amide and ester functionalities occurs via intramolecular cyclization in a single-step reaction in the case of anthranilic
本文中,我们描述了在室温下在可见光照射下,使用分子氧(O 2)作为氧化剂,通过芳基胺与末端炔烃的区域选择性C–N偶联,通过铜的光氧化还原催化乙酰胺的合成(47个例子)。在邻氨基苯甲酸的情况下,使用便宜的铜作为催化剂,使用环保的O 2作为氧化剂和试剂,通过一步一步反应通过分子内环化,可以同时形成酰胺和酯官能团。18 O 2证明,不同的底物经历不同的反应途径以生成相似的乙酰胺产物。标记实验。当前的方案也适用于快速,少步制备生物活性抑制剂(BACE-1和PDE4)。这个过程可以很容易地放大到克级,绿色度量的计算表明了当前光氧化还原方法的经济可行性和生态友好性。
Synthesis and x-ray crystallographic analysis of quinazolinone cholecystokinin/gastrin receptor ligands
作者:Melvin J. Yu、Jefferson R. McCowan、Norman R. Mason、Jack B. Deeter、Laurane G. Mendelsohn
DOI:10.1021/jm00092a003
日期:1992.7
compound 22 (2-[2-(1H-indol-3-yl)ethyl]-3-]-3-(1-methylethoxy) phenyl]-4(3H)-quinazolinone, IC50 = 0.026 microM) is extended with the two heteroaromatic rings adopting an antiperiplanar arrangement around the central sigma bond of the ethane linker, whereas the solid-state conformation for a less active analogue 19 (2-[2-(1H-indol-3-yl)-1-methylethyl]-3-[3-(1- methylethoxy)phenyl]-4(3H)-quinazolinone, IC50