1H and 13C NMR assignments of all three isomeric o-fluoronaphthaldehydes and three o-fluorophenanthrene aldehydes.

Magn Reson Chem

Department of Chemical Development, Boehringer-Ingelheim Pharmaceuticals, Inc., 900 Ridgebury Road, Ridgefield, CT 06877, USA.

Published: January 2010

AI Article Synopsis

  • Three isomeric o-fluoronaphthaldehydes and other fluorinated compounds were thoroughly analyzed using NMR techniques to confirm their structures and chemical behaviors.
  • The study identified six key aldehydes that are essential in creating new chiral ligands.
  • These ligands are crucial for improving the efficiency of rhodium-catalyzed asymmetric hydrogenation reactions, which are important in various chemical syntheses.

Article Abstract

Three isomeric o-fluoronaphthaldehydes, 9-fluorophenanthrene, and three previously unreported o-fluorophenanthrene aldehydes were analyzed in detail by multiple NMR techniques to provide unambiguous assignment of structures and resonances. The six aldehydes serve as the key starting materials for novel chiral ligands used in highly enantioselective rhodium-catalyzed asymmetric hydrogenation reactions.

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http://dx.doi.org/10.1002/mrc.2523DOI Listing

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