以红紫素-18甲酯为起始原料,利用其3-位乙烯基的多电子性,通过氧化、还原、亲电加成和1,3-偶极环加成等反应,对其N21-N23轴的端向结构进行化学修饰,在周环的3-位上引进了能与大环色基以不同方式形成共轭效应的取代基团,完成了11个未见报道具有红紫素-18碳架的叶绿素类二氢卟吩衍生物的合成,其化学结构均经UV,1H NMR,IR及元素分析予以证实;讨论了红紫素-18的周环结构对其电子光谱所产生的影响,并对相应的化学反应提出了可能的反应机理. Using purpurin-18 methyl ester as the starting material, the N-octadecyl-N-phenylglycine was synthesized by the reaction of oxidation, reduction, electrophilic addition and 1,3-dipolar cycloaddition with the electron- -N23 axis of the chemical structure of the terminal modification in the peripheral ring 3-position introduced with the macrocyclic chromophores in different ways to form a conjugate effect of the substituent group completed 11 have not been reported with purpurin The chemical structure of the chlorophyll-chlorin derivatives with -18 carbon skeleton was confirmed by UV, 1H NMR, IR and elemental analysis. The effects of the ring structure of purpurin-18 on the electronic spectra The possible reaction mechanism of the corresponding chemical reaction is proposed.