Department of Applied Chemistry, Graduate School of Engineering, Hiroshima University, Higashi-Hiroshima 739-8527, Japan.
Chem Commun (Camb). 2011 Aug 14;47(30):8512-4. doi: 10.1039/c1cc11955a. Epub 2011 May 24.
ortho-Quinone methides, arising from a formal [2+2] cycloaddition between arynes and DMF, were found to facilely undergo a [4+2] cycloaddition with ester enolates or ketenimine anions to produce diverse coumarins in a straightforward manner.
芳基炔与 DMF 之间经[2+2]环加成反应生成的邻醌甲叉,可容易地与酯烯醇或亚胺叶立德阴离子发生[4+2]环加成反应,以直接的方式生成多种香豆素。