Synthesis of chiral 2-alkyl-8-quinolinyl-oxazoline ligands: reversal of enantioselectivity in the asymmetric palladium-catalyzed allylic alkylation
作者:Xiao-Guang Li、Xu Cheng、Jun-An Ma、Qi-Lin Zhou
DOI:10.1016/s0022-328x(01)01172-x
日期:2001.12
New chiral 2-alkyl-8-quinolinyl-oxazolines were synthesized from 2-alkyl-8-quinolinecarboxylic acids and enantiomerically pure amino alcohols using a convenient procedure. Enantioselective palladium-catalyzedallylicalkylation of 1,3-diphenyl-2-propenyl acetate with dimethyl malonate in the presence of 2-alkyl-8-quinolinyl-oxazolines provided an alkylation product with an opposite configuration compared
A CONVENIENT SYNTHESIS OF 2-ALKYL-8-QUINOLINE CARBOXYLIC ACIDS
作者:Xiao-Guang Li、Xu Cheng、Qi-Lin Zhou
DOI:10.1081/scc-120003396
日期:2002.1
ABSTRACT 2-Methyl-8-quinoline carboxylicacid 1 was readily synthesized by the improved Doebner–Miller reaction using anthranilic acid and crotonaldehyde in a two phase system containing 5 mol% PTC. By alkylation of methyl group in 1, other 2-alkyl-8-quinoline carboxylicacids (2a and 2b) have been easily prepared.