Kufer, Werner and Cmiel, Edmund and Thümmler, F. and Rüdiger, W. and Schneider, Siegfried and Scheer, Hugo
STUDIES ON PLANT BILE PIGMENTS. 2. REGIOSELECTIVE PHOTOCHEMICAL AND ACID CATALYZED Z,E ISOMERIZATION OF DIHYDROBILINDIONE AS PHYTOCHROME MODEL.
In: Photochemistry and Photobiology, Vol. 36: pp. 603-607
The (4 Z, 10 2, 15Ej-2,3-dihydrobilindione 4, along with the fully unsaturated (E, 2, Z)-analogue
8, has been prepared from the corresponding (Z, Z, Z)-isomer by a variation of Falk's method
(Falk et ul., 1980). The photochemical and acid-catalyzed back-reactions have been studied by UV-vis
and 'H-NMR spectroscopy.