Copper/Selectfluor-System-Catalyzed Dehydration-Oxidation of Tertiary Cycloalcohols: Access to β-Substituted Cyclohex-2-enones, 4-Arylcoumarins, and Biaryls
作者:Shaobo Ren、Jian Zhang、Jiahui Zhang、Heng Wang、Wei Zhang、Yunkui Liu、Miaochang Liu
DOI:10.1002/ejoc.201500610
日期:2015.8
A route to β-substituted cyclohex-2-enones, 4-arylcoumarins, and biaryls has been developed. This approach involves a one-pot Cu0/Selectfluor-catalyzed dehydration–oxidation of tertiary cycloalcohols. Thus, by using 2 equiv. of Selectfluor at 25 °C, the dehydration–oxidation of tertiary cyclohexanols and oxabenzocyclohexanols gave β-substituted cyclohex-2-enones and 4-arylcoumarins, respectively; whereas
β-取代的环己-2-烯酮、4-芳基香豆素和联芳基的路线已经开发出来。这种方法涉及一锅 CuO/Selectfluor 催化的叔环醇脱水氧化。因此,通过使用 2 equiv。Selectfluor 在 25 °C 下,叔环己醇和氧杂苯并环己醇的脱水-氧化分别得到 β-取代的环己-2-烯酮和 4-芳基香豆素;而叔环己醇的脱水-氧化使用 2.5 当量得到联芳基化合物作为最终产物。Selectfluor 在 80 °C。