Isoflavones were synthesized from the reaction of 3‐bromochromone derivatives and aryltributylstannanes via Stillecoupling catalyzed by a water‐soluble and reusable PdCl2(NH3)2/2,2′‐cationic bipyridyl system in aqueous solution. For prototype 3‐bromochromone, the coupling reaction was performed at 80°C for 24 hr with 2.5 mol% catalyst in water in the presence of tetrabutylammonium fluoride. After
Novel Synthesis of Isoflavones by the Palladium-Catalyzed Cross-Coupling Reaction of 3-Bromochromones with Arylboronic Acids or Its Esters
作者:Yukio Hoshino、Norio Miyaura、Akira Suzuki
DOI:10.1246/bcsj.61.3008
日期:1988.8
The synthesis of isoflavone derivatives by means of palladium-catalyzed cross-couplingreaction between 3-bromochromones and arylboronic acids or its butyl esters is described.
描述了通过钯催化的 3-溴色酮与芳基硼酸或其丁酯之间的交叉偶联反应合成异黄酮衍生物。
Development of 3-alkyl-6-methoxy-7-hydroxy-chromones (AMHCs) from natural isoflavones, a new class of fluorescent scaffolds for biological imaging
An efficient cross-coupling of 3-iodochromones with triarylbismuths under catalytic palladium conditions is reported. Triarylbismuths were employed as substoichiometric multicoupling nucleophiles for the synthesis of a variety of substituted isoflavones. Under the established protocol, cross-coupling reactions were found to be very efficient, furnishing high yields of products.