中文摘要：

以脱镁叶绿酸-a甲酯为起始原料，利用二氢卟吩大环上的富电子区域的化学反应性对其实施结构修饰，通过外接E环6c．氢的空气氧化、c（3）-乙烯基的亲电加成、羰基的亲核加成和20-meso-氢的亲电取代反应，在外接E环、C（3）-，C（12）-β-位和20．meso-位上完成了羟基或者羟烷基的引进，新建羟基的氧化和脱水反应进一步转换成碳氧双键或者碳碳双键．所合成的11个未见报道的叶绿素类二氢卟吩衍生物的化学结构均经UV，1HNMR，IR及元素分析得以证实，对相应的化学反应提出了可能的反应机理．

英文摘要：

Methyl pheophorbide-a was used as a starting material, and its modifications were carried out making use of the chemical reactivities of electron-richous regions on the chlorin macrocycle. The introdustions of hydroxyl groups or hy- droxyalkyl groups at exocyclic E-ring, C（3）（C12）-fl-position and 20-meso-position were accomplished by the allomerizations of a-hydrogen of the exocyclic E-ring, the electrophilic addition of C（3）-vinyl group, the nucleophilic addition of the carbonyl groups and electrophilic substitution at C（20）-position. The newly-formed hydroxyl groups were further converted into car- bon-oxygen double bonds or carbon-carbon double bonds by oxidation and dehydration reactions. The chemical structures of 11 unreported chlorin derivatives were characterized by UV, 1H NMR, IR spectra and elemental analysis. The possible mecha- nisms about corresponding reactions were tentatively proposed.