Synthesis of chlorophyll–quinone conjugates by Diels–Alder reaction and their fluorescence quenching by intramolecular electron transfer

Extra-Annulated Chlorophyll Derivatives by Scholl Reaction

“…The helical stereoisomers adopt ( P )- and ( M )-configurations as shown in the central and right drawings in Figure , respectively. It is noted that the helical separation is comparable to atropisomerism around the C3–C3 1 single bond of 3-substituted Chl derivatives reported previously …”