Steric and electronic tuning of atropisomeric amino alcohol type ligands with a 1-arylpyrrole backbone

Deák, Szilvia and Mátravölgyi, Béla and Feczku, Gyula and Erdélyi, Zsuzsa and Nyerges, Miklós and Faigl, Ferenc (2015) Steric and electronic tuning of atropisomeric amino alcohol type ligands with a 1-arylpyrrole backbone. Tetrahedron: Asymmetry, 26 (10-11). pp. 593-599. ISSN 0957-4166

Text steric_DSz.pdf Restricted to Registered users only Download (706kB) | Request a copy

Abstract

The synthesis of new, trifluoromethyl group containing atropisomeric amino alcohols and their application in enantioselective diethylzinc additions to aldehydes is described. A significant improvement of the enantioinductive effects of the new ligands by increasing the Bronsted acidity and bulkiness of the triarylcarbinol moiety is also reported. Tuning was achieved by the introduction of phenyl substituents containing two trifluoromethyl groups onto the alpha-carbon of the tertiary alcohol part of the ligand. The application of the new catalysts provided 1-(substituted phenyl)propanols with excellent enantiomeric purities. (C) 2015 Elsevier Ltd. All rights reserved.

Actions (login required)

Edit Item