Catalytic Friedel–Crafts for Quaternary Carbonyl Compounds

  • Author: Theresa Kueckmann
  • Published Date: 23 September 2012
  • Source / Publisher: Chemistry – An Asian Journal/Wiley-VCH
  • Copyright: Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim
thumbnail image: Catalytic Friedel–Crafts for Quaternary Carbonyl Compounds

α-Quaternary carbonyl compounds have numerous applications in organic synthesis, medicinal research, and catalyst
design, but are usually difficult to synthesize. Jian Zhou and Long Chen, East China Normal University, Shanghai, have developed a catalytic Friedel–Crafts arylation of tertiary α-hydroxyesters and α-hydroxyketones to fill this gap. Their method uses metal perchlorate hydrates or perchloric acid to catalyze the addition of various arenes and heteroarenes, such as 2-methylthiophene, 2-methylfuran, anisole, and a variety of substituted indoles, yielding α-quaternary carbonyl compounds.


The aqueous HClO4 catalyst is cheap and easy to handle, and the reaction is tolerant to a variety of functional groups. These advantages, together with the relatively mild conditions employed – a few minutes to hours at 60 °C and 1–5 mol % catalyst – suggest that the method is promising for broad application in organic synthesis. Moreover, it is straightforward to convert the resulting carbonyl compounds into, for example, the corresponding acid by hydrolysis or the alcohol by reduction.


Article Views: 4035

Sign in Area

Please sign in below

Additional Sign In options

Please note that to comment on an article you must be registered and logged in.
Registration is for free, you may already be registered to receive, e.g., the newsletter. When you register on this website, please ensure you view our terms and conditions. All comments are subject to moderation.

Article Comments - To add a comment please sign in

Bookmark and Share

If you would like to reuse any content, in print or online, from ChemistryViews.org, please contact us first for permission. more


CONNECT:

ChemistryViews.org on Facebook

ChemistryViews.org on Twitter ChemistryViews.org on YouTube ChemistryViews.org on LinkedIn Sign up for our free newsletter


Magazine of Chemistry Europe (16 European Chemical Societies)published by Wiley-VCH