关键词: 焦脱镁叶绿酸-a 甲酯, 叶绿素-a 衍生物, 合成, 可见光谱, 光动力疗法

Using methyl pyropheophorbide-a as starting material, the carbonyl structures were constructed in different positions of the chlorin periphery by oxidition of the 3-vinyl group, Grignard reaction and air oxidation and rearrangement of E-ring. Then the synthesis of chlorphyll-a derivatives substituted with β,β-dicyanomethylene having long wavelength absorption property was accomplished by Knoevenagel reaction of the carbonyl group on the chromophore with malononitrile. The effect of the peripheral conjugated substitutes oriented in different directions on the visible spectra was also discussed. The structures of all new chlorine derivatives were characterized by elemtntal analysis, UV, IR and ¹H NMR spectra.

Key words: methyl pyropheophorbide-a, chlorophyll-a derivative, synthesis, visible spectra, photodynamic therapy