摘要
在采用区域选择性硝化方法合成β-硝基-5,10,15,20-四芳基卟啉铜、镍配合物的过程中,发现并通过核磁等方法分析了5,10,15,20-四(2-甲氧基苯基)卟啉及其相应β-硝基取代物的阻旋异构现象。图谱分析表明,与其结构类似的5,10,15,20-四(2-羟基苯基)卟啉及5,10,15,20-四(4-甲氧基苯基)卟啉系列化合物没有该阻旋异构现象,说明邻位甲氧基阻碍了苯环与芳环之间C-C单键的旋转。进一步通过Chemdraw 3D Ultra软件能量最小化计算,讨论了阻转异构体可能的方式。
In the process of synthesizing β-nitro-5,10,15,20-tetra aryl porphyrinato copper (II) and nickel (II) by regioselective nitration, atropisomerism was found in meso-tetra(2-methoxylphenyl)-porphyrin. The nuclear magnetic spectrometry analysis showed that, unlike the 5, 10, 15,20-tetra (hydroxyphenyl) -porphyrin, atropisomer happens in the 5,10, 15,20-tetra (2-methoxyphenyl) porphyrin,because o-methoxyl hinder rotation of σ-bond between the meso-phenyl and porphyrin, the possibility structure of atropisomer was discussed through minimize energy calculation by Chemdraw 3D Ultra software.
出处
《化学研究与应用》
CAS
CSCD
北大核心
2009年第8期1145-1149,共5页
Chemical Research and Application
基金
国家自然科学基金(20471045)项目资助
武汉市青年科技晨光计划(20065004116-36)项目资助