usually two or three of them were isolated, for which the structures were assigned on the basis of ¹H NMR spectra including COSY and NOESY measure-ments. These types of products are attractive starting materials for synthesis of potential anticancer PDT agents with unique structures, being practically unavailable by any other alternative method.
描述了二硝基5,10,15,20-
四苯基卟啉配合物的β,β-取代的异构体的合成,色谱分离和结构解析。在反应中,例如在CHCl 3中的itic acid(黄色HNO 3,d = 1.52,稀释至25%50%)中,生成中硝基
四苯基卟啉螯合物(CuII,NiII,CoII),形成硝基衍
生物的混合物,总收率约为80 %。可以选择性地进行这种硝化反应(在最佳条件下:25%30%HNO 3,30%40 min,室温),主要得到β,β-二
硝基化合物,收率高达73%。从上述可能形成的五种可能的区域异构体的混合物中,通常分离出其中的两种或三种,并根据1 H NMR光谱(包括COZY和NOESY量)对结构进行分配。