Synthesis of Strapped, Dimeric, and Trimeric Porphyrins Based on Intramolecular Macrocyclization Reactions
作者:Atsuhiro Osuka、Fumikazu Kobayashi、Kazuhiro Maruyama
DOI:10.1246/bcsj.64.1213
日期:1991.4
Strapped porphyrins were prepared directly by the acid-catalyzed condensation reaction of 3,3′-diethyl-4,4′-dimethyl-2,2′-dipyrrylmethane and methylenedioxy bridged dialdehydes having a strap linkage longer than 7 atoms. Dimeric and trimeric porphyrins with coplanar and orthogonal (T-shape) geometries were also synthesized in good yields as an application of this method. In the strapped porphyrins, the distortion of porphyrin ring increases systematically on shortening the strap linkage, which is confirmed by their 1H NMR data, red shifted absorption, and fluorescence spectra. In the coplanar dimeric and trimeric porphyrins, the electronic interactions between the porphyrins were distinctly observed, while in the orthogonal “T-shaped” dimers and “H-shaped” trimers, appreciable electronic interactions were not observed.
通过酸催化的缩合反应,直接制备了由3,3'-二乙基-4,4'-二甲基-2,2'-二吡咯甲烷和含有超过7个原子的带状连接的甲二氧桥二醛反应得到的带状卟啉。该方法的应用还包括以良好产率合成了共平面和正交(T形)几何结构的二聚和三聚卟啉。在带状卟啉中,随着带状连接的缩短,卟啉环的畸变逐渐增加,这一点通过它们的1H NMR数据、红移吸收和荧光光谱得到证实。在共平面二聚和三聚卟啉中,明显观察到卟啉之间的电子相互作用,而在正交的“T形”二聚体和“H形”三聚体中,未观察到明显的电子相互作用。