Journal of Molecular Catalysis A-Chemical, Vol.196, No.1-2, 165-169, 2003
Highly enantioselective ene-type spiro-cyclization of allyl propargyl ethers catalyzed by cationic palladium(II) complexes with a new type of PN-ligand bearing achiral gem-dimethyl oxazoline
The first examples of the asymmetric ene-type spiro-cyclization catalyzed by cationic palladium(H) complexes with a new PN-ligand bearing achiral gem-dimethyl oxazoline unit were demonstrated. Spiro-products were synthesized from ether substrates with common, medium and large membered rings with high enantiomeric excesses in almost quantitative yields. (C) 2002 Elsevier Science B.V. All rights reserved.