New Convenient Synthesis of Homoisoflavanones and (±)‐Di‐O‐methyldihydroeucomin
作者:B. Serge Kirkiacharian、Michel Gomis
DOI:10.1081/scc-200049789
日期:2005.3
Upon reaction of 1-(2-hydroxyphenyl)-3-phenylpropane-1-ones (2'-hydroxydihydrochalcones) with dimethylaminodimethoxymethane in boiling toluene, the corresponding 3-benzylchromones are obtained in excellent yields. These latter lead to 3-benzylchroman-4-ones (bomoisoflavanones) by catalytic hydrogenetion. These reactions were applied to the synthesis of (+/-)-3-benzylchroman-4-one and (+/-)-3(4-methoxybenzyl)-5,7-dimethoxychroman-4-one, (+/-)-di-O-methyldihydroeucomin.
KIRKIACHARIAN, SERGE;TONGO, HUBERT G.;BASTIDE, JANINE;BASTIDE, PIERRE;GRE+, EUR. J. MED. CHEM., 24,(1989) N, C. 541-546
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。
Synthe`se et activite´s angioprotectrice, anti-allergique et antihistaminique de benzyl-3 chromones (homo-isoflavones)
作者:Serge Kirkiacharian、Hubert G. Tongo、Janine Bastide、Pierre Bastide、Marie Magdeleine Grenie