有机化学 ›› 2012, Vol. 32 ›› Issue (11): 2154-2161.DOI: 10.6023/cjoc1201202 上一篇    下一篇

研究简报

具有叶绿素-a基本骨架的20-meso-位取代二氢卟吩衍生物的合成

王鲁敏a, 王振a, 杨泽a, 金英学b, 王进军a,c   

  1. a 烟台大学化学化工学院 烟台 264005;
    b 哈尔滨师范大学化学化工学院 哈尔滨 150025;
    c 山东省黄金工程技术研究中心(工业应用) 烟台 264005
  • 收稿日期:2012-01-20 修回日期:2012-07-12 发布日期:2012-07-18
  • 通讯作者: 王进军 E-mail:wjj1955@163.com
  • 基金资助:

    国家自然科学基金(No. 20972036)和山东省自然科学基金(No. Y2008B49)资助项目.

Synthesis of 20-meso-Substituted Chlorins with the Basic Skeleton of Chlorophyll-a

Wang Lumina, Wang Zhena, Yang Zea, Jin Yingxueb, Wang Jinjuna,c   

  1. a College of Chemistry and Chemical Engineering, Yantai University, Yantai 264005;
    b College of Chemistry and Chemical Engineering, Harbin Normal University, Harbin 150025;
    c Shandong Applied Research Centre of Gold Nanotechnology (Au-SDARC), Yantai 264005
  • Received:2012-01-20 Revised:2012-07-12 Published:2012-07-18
  • Supported by:

    Project supported by the National Natural Science Foundations of China (No. 20972036) and the Natural Science Foundation of Shandong Province of China (No. Y2008B49).

以脱镁叶绿酸-a甲酯(MPa)为起始原料, 分别与氯化、溴化和硫酸重氮苯进行偶联反应, 其主要产物为20-卤素取代或者亚硝基取代的二氢卟吩, 仅以微量产率的得到期待的产物. 焦脱镁叶绿酸的锌配合物与3-N,N-二甲胺基丙烯醛的Vilsmeier反应生成20-甲酰乙烯基焦脱镁叶绿酸. 焦脱镁叶绿酸-d与N-溴代丁二酰亚胺(NBS)的溴代反应生成单一的20-溴代产物, 再经Wittig反应恢复乙烯基而得到20-溴代焦脱镁叶绿酸-a甲酯. 其它叶绿素降解产物的亲电取代反应均以较好的产率得到生成的20-meso-位取代的二氢卟吩衍生物. 首次报道的具有叶绿素基本碳架的二氢卟吩衍生物的化学结构均经UV, IR, 1H NMR及元素分析得以证实.

关键词: 叶绿素-a, 脱镁叶绿酸-a, 焦脱镁叶绿酸-a, 二氢卟吩, 亲电反应

Methyl pheophorbide-a (MPa) was used as starting material. The coupling reaction of MPa with diazobenzene hydrochloride, hydrobromide and sulfate was carried out to give traces of expected product, while major products were 20-halogenated and nitroso-substituted chlorins. Zinc methyl pyropheophorbide-a reacted with 3-N,N-dimethylacrolein to give Vilsmeier product. The bromination of pyropheophorbide-d with N-bromosuccinimide (NBS) formed single 20-brominated product, the vinyl group of which was resumed by Wittig reaction to give 20-bromopyropheophorbide-a. The electrophilic substitution of other chlorphyllous degradation products afforded corresponding 20-meso-substituted chlorin derivatives in better yields, respectively. The structures of all the new chlorins with basic skeleton of chlorophyll were characterized by UV, IR, 1H NMR spectra and elemental analysis.

Key words: chlorophyll-a, pheophorbide-a, pyropheophorbide-a, chlorin, electrophilic reaction