Chiral pyridylmethyl- and quinolinyl-oxazolines as ligands for enantioselective palladium-catalyzed allylic alkylation
摘要:
Chiral pyridylmethyl- and quinolinyl-oxazolines were prepared and assessed in the enantioselective palladium-catalyzed allylic substitution of 1,3-diphenylprop-2-enylacetate with dimethyl malonate. Enantioselectivities up to 77% were obtained. (C) 1999 Elsevier Science Ltd. All rights reserved.
Chiral quinolinyl-oxazolines as ligands for copper(I)-catalyzed asymmetric cyclopropanation
摘要:
Chiral quinolinyl-oxazoline compounds have been synthesized from enantiomerically pure amino alcohols and 8-quinoline-carboxylic acid using a convenient procedure. Asymmetric cyclopropanation of styrene with diazo-acetates in the presence of 1 mol% of CuOTf and quinolinyl-oxazolines gave 2-phenylcyclopropane carboxylates in moderate enantiomeric excesses. (C) 1998 Elsevier Science Ltd. All rights reserved.