Model Studies in Photosynthesis (￥°). Synthesis and Characterization of Some Novel Pyropheophorbide Derivatives

摘要

2`-(9"-Anthracenecarbonyloxy)ethyl pyropheophorbide a, methyl 3a-(9`-anthracenecarbonyloxy)pyropheophorbide a, 2`-(4"-phenylbenzoyloxy)ethyl pyropheophorbide a, and methyl 3a-(4`-phenylbenzoyloxy)pyropheophorbide a were prepared from chlorophyll a and b. Nuclear magnetic resonance study showed that the sandwich conformation is more favorable in 2`-(9"-anthracenecarbonyloxy)ethyl pyropheophorbide a than it is in other compounds.