Asymmetric Direct α,β-Functionalization of Allenes via Asymmetric Carbopalladation
作者:Kunio Hiroi、Fumiko Kato、Akiko Yamagata
DOI:10.1246/cl.1998.397
日期:1998.5
Asymmetric direct α,β-functionalization of allenes with chiral phosphine ligands was successfully achieved with extremely high enantioselectivity via asymmetric carbopalladation to the racemic allenes. The same palladium-catalyzed alkylation of a chiral allene was executed with complete enantiospecificity. The stereochemistry of this reaction was determined and the mechanism of this asymmetric induction is proposed.
Stereochemistry of the Asymmetric Carbopalladation of Allenes Followed by Nucleophilic Substitution Reactions with Carbo- and Aminonucleophiles
作者:Fumiko Kato、Kunio Hiroi
DOI:10.1248/cpb.52.95
日期:——
The stereochemistry of the asymmetric palladium-catalyzed reaction of allenes with iodobenzene followed by nucleophilic substitution reaction with sodium malonate and N-methylbenzylamine is described. On the basis of the absolute configuration of the product and the stereochemical result of a similar reaction of a chiral allene, the mechanism of the above asymmetric reactions is discussed.