Palladium-Catalyzed Carbonylative Synthesis of Benzoxazinones from <i>N</i>-(<i>o</i>-Bromoaryl)amides Using Paraformaldehyde as the Carbonyl Source
作者:Wanfang Li、Xiao-Feng Wu
DOI:10.1021/jo5020118
日期:2014.11.7
Carbonylation reactions have been widely used in organic synthesis. However, the manipulation of toxic and pressurized carbonmonoxide limited their applications in organic laboratories. The search for alternative carbonyl sources as an important method for carbonylative organic synthesis is spreading. Herein, a series of substituted benzoxazinones were synthesized from N-(o-bromoaryl)amides by palladium-catalyzed
Certain 2-Furano-4(3H)-Quinazolinone Analogs: Synthesis, Characterization and Pharmacological Evaluation
作者:Varun Bhardwaj、Poonam Sharma、Malleshappa N. Noolvi、Harun M. Patel、Sumit Bansal、Sandeep Lohan、Gaurav Badola
DOI:10.2174/1570180811310040010
日期:2013.3.1
A series of new of 2-furano-4(3H)-quinazolinonederivatives 5 (a-t) were synthesized. The compounds were characterized by their IR, 1H NMR, 13C NMR, and Mass spectral data. The antimicrobial activity of newly anthranilic acid-based compounds against various bacteria; S. aureus, Salmonella enterica, Vibrio cholerae, Bacillus subtilis, Proteus mirabili, Escherichia coli V517, Mycobacterium smegmatics
合成了一系列新的2-呋喃基-4(3H)-喹唑啉酮衍生物5(at)。通过IR,1 H NMR,13 C NMR和质谱数据对化合物进行表征。新的邻氨基苯甲酸基化合物对各种细菌的抗菌活性;金黄色葡萄球菌,肠沙门氏菌,霍乱弧菌,枯草芽孢杆菌,米氏变形杆菌,大肠杆菌V517,耻垢分枝杆菌,铜绿假单胞菌和真菌;以氨苄青霉素和两性霉素B为标准评估白色念珠菌。还评估了所有化合物对茄青枯病菌的抗菌活性,并将其作为商业参考使用Kocide 3000。化合物5d,5g,5j,5l,5q,5r,5s和5t表现出良好的抗菌潜力。
Selective Oxidative Decarbonylative Cleavage of Unstrained C(<i>sp</i><sup>3</sup>)–C(<i>sp</i><sup>2</sup>) Bond: Synthesis of Substituted Benzoxazinones
作者:Ajay Verma、Sangit Kumar
DOI:10.1021/acs.orglett.6b02142
日期:2016.9.2
A transition metal (TM)-free practical synthesis of biologically relevant benzoxazinones has been established via a selective oxidative decarbonylative cleavage of an unstrained C(sp3)–C(sp2) bond employing iodine, sodium bicarbonate, and tbutyl hydroperoxide in DMSO at 95 °C. Control experiments and Density Functional Theory (DFT) calculations suggest that the reaction involves a [1,5]H shift and
Pd‐Catalyzed Carbonylative Synthesis of 4
<i>H</i>
‐Benzo[
<i>d</i>
][1,3]Oxazin‐4‐Ones Using Benzene‐1,3,5‐Triyl Triformate as the CO Source
作者:Yan Zheng、Mengke Dong、Erdong Qu、Jin Bai、Xiao‐Feng Wu、Wanfang Li
DOI:10.1002/chem.202103137
日期:2021.11.22
A Pd-catalyzed CO-free carbonylative synthesis of 4H-benzo[d][1,3]oxazin-4-one derivatives was developed. This new method employed readily available N-(o-bromoaryl)amides as the starting materials and inexpensive benzene-1,3,5-triyl triformate (TFBen) as the stable solid CO surrogate, which would not cause hydrodehalogenation of the starting materials. Remarkably, this method featured a very broad
开发了 Pd 催化的 4 H -benzo[ d ][1,3]oxazin-4-one 衍生物的无 CO 羰基化合成。这种新方法使用容易获得的N -(邻溴芳基)酰胺作为起始原料,使用廉价的三甲酸苯-1,3,5-三酯(TFBen)作为稳定的固体 CO 替代物,不会引起起始原料的加氢脱卤。值得注意的是,该方法具有非常广泛的底物范围,特别适用于将苯并[ d ][1,3]oxazin-4-one结构引入药物和天然生物活性化合物中。
Synthesis of 2-substituted-4H-3,1-benzoxazin-4-ones
作者:D. I. Bain、R. K. Smalley
DOI:10.1039/j39680001593
日期:——
yield. With 1 mol. of benzoyl chloride, however, a mixture of benzoxazinone and N-benzoylanthranilic acid was obtained. The mechanism of the reaction has been investigated and various 2-substituted-4H-3,1-benzoxazin-4-ones have been prepared and their u.v. spectra recorded.
邻氨基苯甲酸(1摩尔)在吡啶溶液中与苯甲酰氯(2摩尔)反应,以高收率得到2-苯基-4 H -3,1-苯并恶嗪-4-酮。与1摩尔。然而,得到了苯甲酰氯的苯并恶嗪酮和N-苯并氰基邻氨基苯甲酸的混合物。已经研究了反应的机理,并制备了各种2-取代的-4 H -3,1-苯并恶嗪-4-酮,并记录了它们的uv光谱。