but efficient: Aza‐fused polycyclic quinolines were efficiently assembled throughrhodium(III)‐based direct double CHactivation of N‐aryl azoles followed by cyclization with alkynes without heteroatom‐assisted chelation. Copper(II) acetate, aside from acting as an oxidant, could also play an important role in the CHactivation process.
<i>N</i>-Arylation of Benzimidazole with Arylboronate, Boroxine and Boronic Acids. Acceleration with an Optimal Amount of Water
作者:Katsutoshi Nishiura、Yoshio Urawa、Shigeru Soda
DOI:10.1002/adsc.200404193
日期:2004.12
The coupling of benzimidazole 1 with arylboronate, boroxine, and boronicacids is accelerated efficiently by the addition of an optimalamount of water. This coupling reaction proceeds in nearly quantitative yield at 30 °C under an atmosphere of air within 24 hours. Under these conditions, the reaction tolerates both electron-donating and electron-withdrawing substituents at the ortho-, meta, or para-positions