Efficient microwave-assisted one-pot three-component synthesis of 2,3-disubstituted benzofurans under Sonogashira conditions
作者:Nataliya A. Markina、Yu Chen、Richard C. Larock
DOI:10.1016/j.tet.2013.02.003
日期:2013.4
efficient one-pot method for the synthesis of 2,3-disubstituted benzo[b]furans from commercially available 2-iodophenols, terminal acetylenes and aryl iodides has been developed utilizing Sonogashira reaction conditions. After an initial Sonogashira coupling of the 2-iodophenol with the terminal alkyne, cyclization involving the aryl iodide provides the 2,3-disubstituted benzo[b]furan in good to excellent
利用Sonogashira反应条件,已经开发出一种有效的一锅法,由市售的2-碘苯酚,末端乙炔和芳基碘化物合成2,3-二取代的苯并[b]呋喃。在将2-碘苯酚与末端炔烃进行最初的Sonogashira偶联后,涉及芳基碘化物的环化反应可提供2,3-二取代的苯并[b]呋喃,收率非常好。微波辐射的使用缩短了反应时间并使副产物最小化。该方法对于构建高度取代的苯并[b]呋喃及其类似物的库特别有用。