From methyl pheophorbide-a (MPa, 1), the pheophorbide-a derivative substituted with hydro- pyrazol 2 was obtained by the 1,3-dipolar cycloaddition of vinyl group at 3-position with diazomethane.

In order to get the benthic microalgae status in intertidal sediments,the contents of chlorophyll-a andphaeopigments in the sediments of the intertidal zone of Qingdao Bay were investigated from October 2003 to April 2004.

The content and distribution of chlorophyll a (chl a) and phaeopigments (pha a) in the sediments of the East China Sea and the Yellow Sea were investigated in October, 2000, and May, 2001.

Determination of Phyllins Pheophorbide a of Bamboo leaves by HPLC;

In the present study, the results showed that, the pheophorbide a had the efficacy in repressing the growth of Staphylococcus aureus and the protoplast regeneration of Escherichia coli under light cultural condition, whereas it had little effect in the dark cultures.

A series of novel purpurin-18 imide derivatives with long absorption wavelength were synthesized through Wittig reaction of methyl pheophorbide-a.

Starting from methyl pheophorbide-a, 3-formyl substituted compound was synthesized through oxidation of its vinyl at 3-position.

In basic condition the cyclopropyl-substituted chlorin 3 was converted into pyropheophorbide 4 by demethoxyformylation.

Methyl pyropheophorbide-d was used as starting material and the Knoevenagel reaction of the aldehyde group on pyropheophorbide with active methylene group in β-diketone, α-cyanoketone or malono- nitrile was carried out to complete the synthesis of derivatives of methyl pyropheophorbide-a substituted with five-membered heterocycle at 3-positipon.