Rhodium-Catalyzed Cascade Reaction: Aryl Addition/Intramolecular Esterification to Access 3-Aryl and 3-Alkenyl Phthalides
作者:Zhishi Ye、Guanglei Lv、Wenhui Wang、Manli Zhang、Jiang Cheng
DOI:10.1002/anie.201000302
日期:2010.5.10
rhodium‐catalyzed addition of aryl and alkenyl boronic acids to phthalaldehyde and subsequent intramolecular esterification is described (see scheme; cod=1,5‐cyclooctadiene, dppb=1,4‐bis(diphenylphosphino)butane). The method is facile and practical for accessing 3‐aryl and 3‐alkenyl phthalides in moderate to good yields. Several functional groups are tolerated under the reaction conditions.
首先一个,然后另一个:描述了铑催化的芳基和烯基硼酸到邻苯二甲醛的加成反应,以及随后的分子内酯化(见方案; cod = 1,5-环辛二烯,dppb = 1,4-双(二苯基膦基)丁烷) 。该方法简便易行,适用于以中等到良好的收率获得3-芳基和3-烯基邻苯二甲酸酯。在反应条件下可以容忍几个官能团。