通过钯催化的3-碘-2-(甲基硫烷基)苯并[ b ]呋喃与各种末端炔的交叉偶联,可以在温和的反应条件下轻松制备3-炔基-2-(甲基硫烷基)苯并[ b ]呋喃。该反应用炔丙醇,受保护的炔丙醇以及烷基和芳基末端炔烃进行。另外,使用氢碲化反应容易地将获得的3-炔基苯并[ b ]呋喃转化为更复杂的产物,这以良好的产率提供了所需的乙烯基碲化物。此外,使用铜催化的均偶联反应,我们能够以良好的收率将3-炔基苯并[ b ]呋喃转化为对称的二炔。 钯-Sonogashira交叉偶联-呋喃-炔烃-催化
Palladium catalyzed Suzuki cross-coupling of 3-iodo-2-(methylthio)-benzo[b]furan derivatives: synthesis of 3-aryl-2-(methylthio)benzo[b]furans
作者:Rafaela M Gay、Flávia Manarin、Ricardo Brandão、Gilson Zeni
DOI:10.1590/s0103-50532010000900006
日期:——
A selective and efficient method for the synthesis of 3-aryl-2-(methylthio)benzo[ b]furans derivatives by palladiumcatalyzed cross-coupling reaction with boronic acids has been developed. The reaction proceeded cleanly under mild conditions and was performed with aryl boronic acids bearing electron-withdrawing, electron donating and neutral substituents.