A systematic comparison of Lewis acid catalysts [Ca(II), Li(I) and Fe(III)] is presented for catalytic Friedel–Crafts reactions using alcohols on 4‐, 5‐, and 6‐membered oxygen and nitrogen heterocycles and cyclobutanes, forming gem‐diaryl quaternary centers.
路易斯酸催化剂[Ca(II),Li(I)和Fe(III)]的系统比较被提出用于使用醇在4、5和6元氧和氮杂环和
环丁烷上进行的催化Friedel-Crafts反应,形成宝石-二芳基四元中心。