Zeng Rong, Dong Guangbin
Department of Chemistry, University of Texas at Austin , Austin, Texas 78712, United States.
J Am Chem Soc. 2015 Feb 4;137(4):1408-11. doi: 10.1021/ja512306a. Epub 2015 Jan 15.
Herein we report a [5 + 2 - 1] transformation though catalytic decarbonylative coupling between isatins and alkynes, which provides a unique way to synthesize 2-quinolinone derivatives. A broad range of alkynes can be coupled efficiently with high regioselectivity. This reaction is proposed to go through C-C activation of isatins, followed by decarbonylation and alkyne insertion. Directing group (DG) plays a critical role in this transformation. Assisted by the DG, the C-C cleavage of isatins occurs at room temperature.
在此,我们报道了一种通过异吲哚酮与炔烃之间的催化脱羰偶联实现的[5 + 2 - 1]转化,该转化为合成2-喹啉酮衍生物提供了一种独特的方法。多种炔烃能够以高区域选择性高效偶联。该反应被认为是先通过异吲哚酮的C-C活化,然后进行脱羰和炔烃插入。导向基团(DG)在这一转化过程中起着关键作用。在导向基团的协助下,异吲哚酮的C-C裂解在室温下发生。