Selective Electrochemical Oxygenation of Alkylarenes to Carbonyls
作者:Xue Li、Fang Bai、Chaogan Liu、Xiaowei Ma、Chengzhi Gu、Bin Dai
DOI:10.1021/acs.orglett.1c02651
日期:2021.10.1
An efficient electrochemical method for benzylic C(sp3)–H bond oxidation has been developed. A variety of methylarenes, methylheteroarenes, and benzylic (hetero)methylenes could be converted into the desired aryl aldehydes and aryl ketones in moderate to excellent yields in an undivided cell, using O2 as the oxygensource and lutidinium perchlorate as an electrolyte. On the basis of cyclic voltammetry
已经开发了一种用于苄基 C(sp 3 )-H 键氧化的有效电化学方法。各种甲基芳烃、甲基杂芳烃和苄基(杂)亚甲基可以在未分割的电池中以中等至极好的收率转化为所需的芳醛和芳酮,使用 O 2作为氧源,高氯酸镥作为电解质。在循环伏安法研究、18 O 标记实验和自由基捕获实验的基础上,提出了一种可能的单电子转移机制用于电氧化反应。
Selective synthesis of (1<i>H</i>-benzo[<i>d</i>]imidazol-2-yl)(phenyl)methanone and quinoxaline from aromatic aldehyde and <i>o</i>-phenylenediamine
We have designed a general, inexpensive, and versatile method for the synthesis of (1H-benzo[d]imidazol-2-yl)(phenyl)methanone and the formation of C–N bonds via an aromaticaldehyde and o-phenylenediamine. In the presence of N,N-dimethylformamide/sulfur, (1H-benzo[d]imidazol-2-yl)(phenyl)methanone was obtained; however, in the absence of sulfur, quinoxaline was obtained in 1,4-dioxane. A wide range
我们设计了一种通用,廉价且通用的方法,用于合成(1 H-苯并[ d ]咪唑-2-基)(苯基)甲酮并通过芳香醛和邻苯二胺形成C–N键。在N,N-二甲基甲酰胺/硫的存在下,得到(1H-苯并[ d ]咪唑-2-基)(苯基)甲酮。然而,在不存在硫的情况下,在1,4-二恶烷中获得了喹喔啉。在温和的条件下获得了广泛的喹喔啉和(1 H-苯并[ d ]咪唑-2-基)(苯基)亚甲酮。
Selective Oxidation of Alkylarenes to the Aromatic Ketones or Benzaldehydes with Water
作者:Jin Zhang、Jihong Du、Chenyang Zhang、Kun Liu、Feifei Yu、Yongkun Yuan、Baogen Duan、Renhua Liu
DOI:10.1021/acs.orglett.1c04154
日期:2022.2.11
Here a palladium-catalyzed oxidation method for converting alkylarenes into the aromaticketones or benzaldehydes with water as the only oxygen donor is reported. This C–H bond oxidation functionalization does not require other oxidants and hydrogen acceptors, and H2 is the only byproduct. The oxygen atom introduced into the products is confirmed to be from water by the MS analysis on the product of
这里报道了一种钯催化的氧化方法,用于将烷基芳烃转化为芳族酮或苯甲醛,水作为唯一的氧供体。这种 C-H 键氧化功能化不需要其他氧化剂和氢受体,H 2是唯一的副产物。通过对18 O-标记水反应的产物进行 MS 分析,确认了引入产物中的氧原子来自水。
Co/NHPI-mediated aerobic oxygenation of benzylic C–H bonds in pharmaceutically relevant molecules
作者:Damian P. Hruszkewycz、Kelsey C. Miles、Oliver R. Thiel、Shannon S. Stahl
DOI:10.1039/c6sc03831j
日期:——
pharmaceutically relevant (hetero)arenes to the corresponding (hetero)aryl ketones. The radical reaction pathway tolerates electronically diverse benzylic C–H bonds, contrasting recent oxygenationreactions that are initiated by deprotonation of a benzylic C–H bond. The reactions proceed under practicalreaction conditions (1 M substrate in BuOAc or EtOAc solvent, 12 h, 90–100 °C), and they tolerate common
The design, synthesis, and biological evaluation of potent receptor tyrosine kinase inhibitors
作者:Moon H. Kim、Amy Lew Tsuhako、Erick W. Co、Dana T. Aftab、Frauke Bentzien、Jason Chen、Wei Cheng、Stefan Engst、Levina Goon、Rhett R. Klein、Donna T. Le、Morrison Mac、Jason J. Parks、Fawn Qian、Monica Rodriquez、Thomas J. Stout、Jeffrey H. Till、Kwang-Ai Won、Xiang Wu、F. Michael Yakes、Peiwen Yu、Wentao Zhang、Yeping Zhao、Peter Lamb、John M. Nuss、Wei Xu
DOI:10.1016/j.bmcl.2012.06.029
日期:2012.8
Variously substituted indolin-2-ones were synthesized and evaluated for activity against KDR, Flt-1, FGFR-1 and PDGFR. Extension at the 5-position of the oxindole ring with ethyl piperidine (compound 7i) proved to be the most beneficial for attaining both biochemical and cellular potencies. Further optimization of 7i to balance biochemical and cellular potencies with favorable ADME/ PK properties led to the identification of 8h, a compound with a clean CYP profile, acceptable pharmacokinetic and toxicity profiles, and robust efficacy in multiple xenograft tumor models. (c) 2012 Elsevier Ltd. All rights reserved.