Double-Oxidative Dehydrogenative (DOD) [4 + 2]-Cyclization/Oxidative Aromatization Tandem Reaction of Glycine Derivatives with Ethylbenzenes
作者:Wei Jiang、Yajun Wang、Pengfei Niu、Zhengjun Quan、Yingpeng Su、Congde Huo
DOI:10.1021/acs.orglett.8b01941
日期:2018.8.3
structure formation. A Cu(II)/DDQ/O2 system-catalyzed DOD [4 + 2]-annulation/oxidative aromatization tandem reaction of readily available glycine derivatives and alkylbenzenes was established. This approach facilitates rapid access to a broad scope of substituted quinoline-2-carboxylate derivatives, an important motif in drug discovery. The reaction could feasibly be applied to a 10 gram-scale synthesis
双氧化脱氢(DOD)环化代表了最简单,最经济的环状结构形成方法之一。建立了Cu(II)/ DDQ / O 2系统催化的易得甘氨酸衍生物和烷基苯的DOD [4 + 2]环化/氧化芳构化串联反应。这种方法有助于快速获得广泛范围的取代的喹啉-2-羧酸衍生物,这是药物发现中的重要主题。该反应可以可行地应用于10克规模的合成。
Double-Oxidative Dehydrogenative [4+2]-Cyclization/Dehydrogenation/Oxygenation Tandem Reaction of <i>N</i>-Arylglycine Derivatives with Cumenes
作者:Wei Jiang、Shuocheng Wan、Yingpeng Su、Congde Huo
DOI:10.1021/acs.joc.9b00506
日期:2019.6.21
most straightforward strategies for the synthesis of cyclic compounds. A novel approach to substituted 3,4-dihydroquinoline-3-one derivatives via a Cu(II)/DDQ/O2 system-catalyzed DOD [4+2]-cyclization/dehydrogenation/oxygenation cascade reaction of N-arylglycine derivatives, cumenes, and O2 has been developed.
双氧化脱氢(DOD)环化是合成环状化合物最直接的策略之一。通过Cu(II)/ DDQ / O 2系统催化的N-芳基甘氨酸衍生物枯烯的DOD [4 + 2]-环化/脱氢/加氧级联反应取代3,4-二氢喹啉-3-酮衍生物的新方法,并且已经开发了O 2。
SbCl<sub>3</sub> initiated conjunctive C–H bond functionalization and carbochlorination between glycine esters and methylenecyclopropanes (MCPs)
In the presence of dioxygen, an antimony trichloride enabled conjunctive sp3 C–H bond functionalization and carbochlorination of glycines was realized, providing a series of chlorinated quinolines in high yields. The mechanistic study shows that the antimony(V) species might be involved in the oxidation of the sp3 C–H bond and is followed by carbochlorination through a radical intermediate.
Tris(4-bromophenyl)aminium Hexachloroantimonate-Initiated Oxidative Povarov-Type Reaction between Glycine Esters and (Cyclopropylidenemethyl)benzenes Using the Counterion as a Chlorine Donor
-initiated oxidative Povarov-type reactionbetween glycines and methylenecyclopropanes was realized in the presence of dioxygen, in which the counterion, SbCl6–, served as a chlorine atom donor, enabling the synthesis of a series of chlorinated quinolines in high yields. The mechanistic study showed that the chlorination step might be related to antimony chloride via a radical chlorine atom transfer
Photocatalyzed Reverse Polarity Oxidative Povarov Reaction of Glycine Derivatives with Maleimides
作者:Yongxin Zhang、Wei Jiang、Xiazhen Bao、Yifeng Qiu、Yong Yuan、Caixia Yang、Congde Huo
DOI:10.1002/cjoc.202100401
日期:2021.12
An oxidative tandem (4+2)-cyclization/aromatization of N-aryl glycine derivatives with electron-deficient alkenes was first achieved using Ru(bpy)3Cl2 as a photocatalyst and TBHP as an oxidant in combination with visible-light irradiation by blue LEDs. One-electron oxidation and the following α-deprotonation of glycine derivatives afford α-amino alkyl radicals, which were then trapped by electrophilic