title: Chiral discrimination in photochromic helicenes.
abstract: A photoresponsive dithienylethene derivative bearing chiral pinene-based arms underwent a stereoselective photoinduced cyclization reaction to produce greater than 98% of a single diastereomer. The magnitude of the optical rotation changed as much as Delta[alpha]373 = 8698 degrees upon alternate irradiation with 400 nm and greater than 434 nm light.
authors.affiliation: Department of Chemistry, Simon Fraser University, Burnaby, BC, Canada.
authors.forename: Tony J
authors.initials: TJ
authors.lastname: Wigglesworth
authors.forename: David
authors.initials: D
authors.lastname: Sud
authors.forename: Tyler B
authors.initials: TB
authors.lastname: Norsten
authors.forename: Vikram S
authors.initials: VS
authors.lastname: Lekhi
authors.forename: Neil R
authors.initials: NR
authors.lastname: Branda