Organocatalyzed Friedel–Crafts arylation of benzylic alcohols
作者:J. Adam McCubbin、Oleg V. Krokhin
DOI:10.1016/j.tetlet.2010.02.151
日期:2010.5
Electron-rich aromatic and heteroaromatic rings are functionalized directly with a variety of benzylic alcohols under mild conditions. The reaction is catalyzed by commercially available pentafluorophenylboronic acid, which is stable under ambient conditions and recoverable. The reaction itself is highly atom economical and produces water as the only byproduct. A Friedel-Crafts mechanism is proposed. (C) 2010 Elsevier Ltd. All rights reserved.
A Novel Synthetic Route to 2-Arylalkanoic Acids by a Ruthenium-Catalyzed Chemoselective Oxidation of Furan Rings
Friedel-Crafts alkylation of 2-methylfuran with 1-arylalkanols without employing anhydrous conditions. The chemoselective oxidation of the furanring in 1-arylalkylfurans to carboxylic acid was then investigated. In a solvent system of hexane-EtOAc/H 2 O (1:3:4), the furanring was selectively oxidized with 7 equivalents of NaIO 4 by using 0.5 mol% RuCl 3 as catalyst to give 2-arylalkanoic acids in good yields