Chiral helicenoid diarylethene with highly diastereoselective photocyclization.
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.
Tani
Yutaka
Y
Department of Advanced Materials Chemistry, Graduate School of Engineering, Yokohama National University, Hodogaya, Yokohama 240-8501, Japan.
Ubukata
Takashi
T
Yokoyama
Yayoi
Y
Yokoyama
Yasushi
Y