Literature DB >> 24039083

On the acidity and reactivity of highly effective chiral Brønsted acid catalysts: establishment of an acidity scale.

Karl Kaupmees1, Nikita Tolstoluzhsky, Sadiya Raja, Magnus Rueping, Ivo Leito.   

Abstract

Stronger acid, higher speed: The pKa  values of a range of binol-derived Brønsted acids of three different types were measured and found to correlate directly with the catalytic properties of the acids: higher rate constants kI were observed for more acidic Brønsted acid catalysts (see plot; binol=1,1'-bi-2-naphthol).
Copyright © 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Entities:  

Keywords:  N-triflylphosphoramides; Nazarov cyclization; acidity; organocatalysis; phosphoric acids

Year:  2013        PMID： 24039083     DOI： 10.1002/anie.201303605

Source DB:  PubMed          Journal:  Angew Chem Int Ed Engl        ISSN： 1433-7851            Impact factor:   15.336


  13 in total

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8.  Association Equilibria of Organo-Phosphoric Acids with Imines from a Combined Dielectric and Nuclear Magnetic Resonance Spectroscopy Approach.

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