Unexpected formation of (Z)-3-(halomethylene)isoindolinones from gem-dihalovinylbenzonitriles: efficient synthesis of enyne-containing isoindolinones
作者:Chengming Wang、Caiyun Sun、Fei Weng、Mingchun Gao、Bingxin Liu、Bin Xu
DOI:10.1016/j.tetlet.2011.03.143
日期:2011.6
An efficient one-pot procedure for the regioselective synthesis of (Z)-3-(halomethylene)-isoindolin-1-ones was developed from easily accessible 2-(2,2-dihalovinyl)benzonitriles. From this key intermediate, a variety of isoindolinones containing an enyne moiety were synthesized in good to excellent yields via palladium-catalyzed Sonogashira reaction. The generated enyne-containing isoindolinones could
一种有效的一锅法用于区域选择性合成(Z)-3-(卤代亚甲基)-异吲哚啉-1-酮的方法是从易于获得的2-(2,2-二卤代戊基)苄腈中开发的。从该关键中间体,通过钯催化的Sonogashira反应以良好至优异的产率合成了多种含有烯炔部分的异吲哚啉酮。所产生的含烯炔的异吲哚啉酮可通过碘化物诱导的环化反应进一步处理,从而以高收率提供通用的合成中间体5 H-吡咯并[2,1 - a ]异吲哚醇-5-酮,并可进一步精制。