title: Asymmetric induction in the [4+2]cycloaddition of cyclopentadiene and furan to chiral derivatives of fumaric acid.
abstract: [4+2]Cycloaddition reactions of cyclopentadiene (1a) and furan (1b) to N,N'-fumaroyldi[(2R)-bornane-10,2-sultam] (2) and to N,N'-fumaroyldi[(2R)-bornane-10,2-(2'-phenyl-pyrazol-3'-one)] (3) are presented. A correlation between the solvent polarity and the logarithm of the diastereoisomer ratio (dr) was found for the uncatalyzed [4+2]cycloaddition of 1a to 3.
authors.affiliation: Department of Chemistry, University of Warsaw, Warsaw, Poland.
authors.forename: A
authors.initials: A
authors.lastname: Kucharska
authors.forename: R
authors.initials: R
authors.lastname: Gorczyńska
authors.forename: C
authors.initials: C
authors.lastname: Chapuis
authors.forename: J
authors.initials: J
authors.lastname: Jurczak