title: Chiral helicenoid diarylethene with highly diastereoselective photocyclization.
abstract: A novel photochromic helicenoid diarylethene (R)-1-[1-(1-methoxymethoxyethyl)-2-naphtho[2,1-b]thienyl]-2-(2,4,5-trimethyl-3-thienyl)hexafluorocyclopentene was synthesized enantioselectively. It showed highly diastereoselective photocyclization (90% de) and a large change (950 degrees) in the specific optical rotation value at 633 nm upon UV light irradiation in ethyl acetate.
authors.affiliation: Department of Advanced Materials Chemistry, Graduate School of Engineering, Yokohama National University, Hodogaya, Yokohama 240-8501, Japan.
authors.forename: Yutaka
authors.initials: Y
authors.lastname: Tani
authors.forename: Takashi
authors.initials: T
authors.lastname: Ubukata
authors.forename: Yayoi
authors.initials: Y
authors.lastname: Yokoyama
authors.forename: Yasushi
authors.initials: Y
authors.lastname: Yokoyama