A P-O chelation with palladium: Toward understanding of the stereochemistry of an optically active sulfinyl-substituted phosphine with five stereogenic centres

Abstract

The enantiomerically pure Diels-Alder product (-)-1 was subjected to chloride abstraction to give the title complex (-)-2. The absolute stereochemistry of the optically active ligand, 2,3-dimethyl-7-phenyl-5-vinylsulfinyl-7-phosphabicyclo[2.2.1]hept-2-en e 3, in (-)-2 was confirmed by crystallographic analysis. 3 formed a six-membered P-O chelate with the [(R)-1-[1-(dimethylamino)ethyl]-2-naphthalenyl-C,N]palladium(II) unit.