A Facile Synthesis of 2H??Chromenes and 9??Functionalized Phenanthrenes through Reactions between α, β??Unsaturated Compounds and Arynes

T Zhang, X Huang, L Wu

Index: Zhang, Tiexin; Huang, Xian; Wu, Luling European Journal of Organic Chemistry, 2012 , # 18 p. 3507 - 3519

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Citation Number: 3

Abstract

Abstract Facile syntheses of 2H-chromenes or 9-functionalized phenanthrenes under mild conditions in moderate to good yields have been developed. They each involve annulations of arynes with α, β-unsaturated compounds bearing different electron-withdrawing groups (EWGs). Depending on the natures of the different EWGs, the reactions proceed by different pathways: enals react with arynes through a tandem [2+ 2] cycloaddition/thermal ...