Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5216963 | Tetrahedron | 2014 | 6 Pages |
Abstract
The formyl group at the 3-position of methyl pyropheophorbide-d, one of chlorophyll-a derivatives, was efficiently transformed to the 32-cis-unsubstituted/methyl- or 32-cis-phenyl-32-trans-nitro-vinyl groups by Henry (nitro-aldol) or nitro-Mannich (aza-Henry) reactions with nitromethane/ethane or nitrophenylmethane, respectively. The introduction of a nitro group at the terminal of the 3-ethenyl moieties directly connected with the chlorin Ï-system red-shifted and broadened their Qy electronic absorption and fluorescence emission bands in a solution. The fluorescence intensities were largely suppressed by the substitution with the nitro group.
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Related Topics
Physical Sciences and Engineering
Chemistry
Organic Chemistry
Authors
Hitoshi Tamiaki, Masaki Ohata, Yusuke Kinoshita, Shinnosuke Machida,