Site-Selective Iron(III) Chloride-Catalyzed Arylation of 4-Aryl-4-methoxy-2,5-cyclohexadienones for the Synthesis of Polyarylated Phenols
作者:Yoshinari Sawama、Masahiro Masuda、Ryosuke Nakatani、Hiroki Yokoyama、Yasunari Monguchi、Toshifumi Dohi、Yasuyuki Kita、Hironao Sajiki
DOI:10.1002/adsc.201600577
日期:2016.12.7
The iron(III) chloride‐catalyzed Friedel–Crafts arylation of 4‐aryl‐4‐methoxy‐2,5‐cyclohexadienones, which were easily prepared by the phenyliodine(III) diacetate (PIDA)‐mediated oxidation of 4‐arylphenols in methanol, proceeded site‐selectively to form meta‐terphenyl (2,4‐diarylphenol) derivatives in good yields. The subsequent PIDA‐mediated oxidation and iron(III) chloride‐catalyzed Friedel–Crafts
铁(III)催化的4-芳基-4-甲氧基-2,5-环己二酮的氯化铁的Friedel-Crafts芳基化反应很容易由苯乙酸碘(III)二乙酸酯(PIDA)介导的甲醇中的4-芳基苯酚的氧化反应制得,选择性地进行,形成了高收率的间-叔苯基(2,4-二芳基苯酚)衍生物。随后由PIDA介导的氧化反应和氯化铁(III)催化的Friedel-Crafts芳基化反应生成相应的2,4,6-三芳基苯酚衍生物。本方法提供了有用的高度取代的聚芳基化合物。