TBHP as Methyl Source under Metal-Free Aerobic Conditions To Synthesize Quinazolin-4(3<i>H</i>
)-ones and Quinazolines by Oxidative Amination of C(sp<sup>3</sup>
)-H Bond
作者:Sushobhan Mukhopadhyay、Dinesh S. Barak、Sanjay Batra
DOI:10.1002/ejoc.201800495
日期:2018.6.15
tert‐Butyl hydroperoxide (TBHP) served as the methylsourceunder metal‐free aerobicconditions in the oxidativeamination of a C(sp3)–Hbond to provide quinazolin‐4(3H)‐one and quinazoline derivatives.
A Green Synthesis of Pyrido[1,2-<i>a</i>]quinazoline-1,6-dione Derivatives in Ionic Liquid Catalyzed by Iodine
作者:Lian Lu、Mei-Mei Zhang、Xiang-Shan Wang
DOI:10.1002/jhet.1837
日期:2014.8
A mild, green, and facile route to the synthesis of 3,4,4a,5-tetrahydro-4a-methyl-2H-pyrido[1,2-a]quinazoline-1,6-dionederivatives has been developed. In the presence of iodine, a variety of 2-aminobenzamides underwent a tandem reaction with 6-chlorohexan-2-one to afford the corresponding pyridoquinazolines in good to high yields.
A Green Synthesis of Pyrrolo[1,2-<i>a</i>]quinazolin-5(1<i>H</i>)-one Derivatives in Ionic Liquids Catalyzed by Iodine
作者:Jie-Xing Zhou、Lian Lu、Tuan-Jie Li、Chang-Sheng Yao、Xiang-Shan Wang
DOI:10.1002/jhet.1768
日期:2014.9
A series of 2,3,3a,4‐tetrahydro‐3a‐methylpyrrolo[1,2‐a]quinazolin‐5(1H)‐one derivatives were synthesized by a reaction of 2‐aminobenzamide and 5‐chloropentan‐2‐one at 80 °C catalyzed by iodine in ionicliquid of [BMIm]Br. Compared with the other methods, this novel method has the advantages of milder reaction conditions, high yields, environmental benignity, and metal‐free catalyst.
Structurally diversified products from the reactions of 2-aminobenzamides with 1,3-cyclohexanediones catalyzed by iodine
作者:Lian Lu、Mei-Mei Zhang、Hong Jiang、Xiang-Shan Wang
DOI:10.1016/j.tetlet.2012.11.042
日期:2013.2
Controlling the reaction temperature at 50 °C, 80 °C, and 110 °C, respectively, the iodine-catalyzed reaction of 2-aminobenzamides with 1,3-cyclohexanediones gave structurally diversified products. In the latter, it gave bis-quinazolin-4(3H)-ones unexpectedly, with 1,3-cyclohexanediones ring-opening.
Iodine-catalyzed synthesis of pyrrolo[1,2-a]quinazoline-3a-carboxylic acid derivatives in ionic liquids
作者:Mei-Mei Zhang、Lian Lu、Yu-Jing Zhou、Xiang-Shan Wang
DOI:10.1007/s11164-012-0845-x
日期:2013.9
Abstract The iodine-catalyzed reaction of 2-aminobenzamide and 2-oxopentanedioic acid in ionic liquids is described in this paper. It gave 1,5-dioxo-1,2,3,3 a ,4,5-hexahydropyrrolo[1,2- a ]quinazoline-3 a -carboxylicacidderivatives in high yields. One of their structures was confirmed by X-ray diffraction analysis. Graphical Abstract