Synthesis of Quinoline-Based Thieno-Seleno-Phenylquinazolinones
摘要:
The synthesis of quinoline-substituted phenylquinazolinones containing sulfur and selenium is described. These molecules were isolated from a series of reactions of 2-phenyl-4H-3,1-benzoxazin-4-one with 2-chloro, 2-thieno, and 2-selenoquinoline-3-carbaldehyde hydrazones. The structure of the isolated compounds has been elucidated on the basis of IR, 1H NMR, mass spectral, and elemental analysis data.
A novel and efficient method for the oxidation of 2-arylindoles to synthesize 2-arylbenzoxazinones utilizing oxone as the sole oxidant has been developed. The reaction tolerates a wide range of functional groups and allows quick and atom-economical assembly of a variety of valuable 2-arylbenzoxazinones in high yields.
Concise synthesis of cyclic carbonyl compounds from haloarenes using phenyl formate as the carbonyl source
作者:Hideyuki Konishi、Hiroki Nagase、Kei Manabe
DOI:10.1039/c4cc09413a
日期:——
Carbonylative cyclization of haloarenes bearing nucleophilic moieties under Pd catalysis has been developed as a general, user-friendly method for access to various cyclic carbonyl compounds.
One-Pot Synthesis of 2-Arylbenzoxazinones from 2-Arylindoles with (Diacetoxyiodo)benzene as the Sole Oxidant
作者:Xu-Qin Li、Xian-Xing Shang、Huu-Manh Vu
DOI:10.1055/s-0036-1590933
日期:2018.1
Abstract A series of synthetically interesting 2-arylbenzoxazinones was prepared from 2-arylindoles by an efficient oxidative reaction mediated by (diacetoxyiodo)benzene [PhI(OAc)2] and assisted by water. PhI(OAc)2 was used as the sole oxidant and water was a crucial additive. Our preliminary mechanistic investigations suggest that a water-involved, iodine(III)-promoted sequential oxidation of 2-arylindoles
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。
Silver and Palladium Cocatalyzed Carbonylative Activation of Benzotriazoles to Benzoxazinones under Neutral Conditions
作者:Zhiping Yin、Zechao Wang、Xiao-Feng Wu
DOI:10.1021/acs.orglett.7b03184
日期:2017.11.17
A novel and efficient method for the carbonylative activation of benzotriazoles to benzoxazinones has been developed. By using a silver and palladium bimetallic catalyst system, a broad range of benzotriazoles were transformed into the corresponding benzoxazinones in moderate to good yields with excellent functional group tolerance. Notably, this procedure proceeds under neutral conditions.