Synthesis of 3-(2-Olefinbenzyl)-4<i>H</i>-chromen-4-one through Cyclobenzylation and Catalytic C–H Bond Functionalization Using Palladium(II)
作者:Yu-Feng Lin、Chi Fong、Wan-Ling Peng、Kuei-Chien Tang、Yi-En Liang、Wen-Tai Li
DOI:10.1021/acs.joc.7b01626
日期:2017.10.20
and benzyl bromide to produce homoisoflavonoid. The second step involves intermolecular Pd-catalyzed π-chelating-assisted C–H bond olefination. Using the C-2/C-3 double bond of chromone, palladium-catalyzed aryl C–H bond activation can be functionalized to generate ortho-olefination derivatives in moderate to high yields.
开发了一种有效的策略,可以分两步合成3-(2-烯烃苄基)-4 H -chromen -4-one。第一步是(E)-3-(二甲基氨基)-1-(2-羟基苯基)丙-2-烯-1-酮与苄基溴之间的环苄基化反应,以生成均异黄酮。第二步涉及分子间Pd催化的π螯合辅助的C–H键烯化。使用色酮的C-2 / C-3双键,可以将钯催化的芳基C–H键活化功能化,以中等至高收率生成邻烯化衍生物。
Synthesis of 3-Substituted Chromones and Quinolones from Enaminones
scientific achievements within his career Abstract A facile and efficient synthetic route to 3-substitutedchromones and quinolones was developed. Silver triflate was employed to activate the electrophile to react with various readily available enaminones. A facile and efficient synthetic route to 3-substitutedchromones and quinolones was developed. Silver triflate was employed to activate the electrophile
A Facile Total Synthesis of Neurotrophic Metabolite (+/-)-Neuchromenin
作者:Josierika Ramos、Tanus Nagem、Jason Taylor
DOI:10.2174/15701786113106660088
日期:2014.2
The synthesis of (+/-)-neuchromenin, a known natural product that induces neurite outgrowth of PC12 cells, is
described. The total synthesis involved constructing a chromone ring from sesamol and coupling this intermediate to an
aldehyde by a Morita-Baylis-Hillman reaction (MBH). The MBH adduct was cyclized under acidic conditions followed
by removal of a methylene group to afford (+/-)-neuchromenin in 9 steps from sesamol.