Selective Double Functionalization ofmeso-Tetraphenylporphyrin Complexes on the Same Pyrrole Unit by Tandem Electrophilic/Nucleophilic Aromatic Substitution
作者:Stanisław Ostrowski、Anna M. Raczko
DOI:10.1002/hlca.200590091
日期:2005.5
The mono-nitrated meso-tetraphenylporphyrin (TPP) complex 2 could be readily functionalized on the substituted pyrrole ring with yields of up to 83%. These transformations were achieved via aromatic substitution with carbanions generated from diverse functionalized compounds containing different leaving groups (3a–g, Scheme 1). The resulting TPP compounds 4a–g, bearing two different β-substituents
单硝化的内消旋-四苯基卟啉(TPP)配合物2可以很容易地在取代的吡咯环上进行官能化,收率高达83%。这些转化是通过用含有不同离去基团的各种官能化化合物生成的碳负离子进行芳族取代实现的(3a – g,方案1)。可以进一步处理在同一吡咯环上带有两个不同β-取代基的TPP化合物4a – g。反过来,这应该允许人们调整光动力癌症治疗中使用的TPP衍生物的溶解度。