A series of chiral A4, A2B2, and AB3 porphyrins bearing proline moieties at the meso-phenyl group has been synthesized. Photostability studies revealed that the number of L-proline units and their position on meso-phenyl rings strongly influence the decomposition rate of the catalyst. 5,10,15-Tris(mesityl)-20-(3-prolinanilidylphenyl)-21,23H-porphyrin is the most stable while porphyrin bearing four 3-prolinanilidylphenyl substituents completely decomposes in CHCl 3 within 3 h. Singlet oxygen quantum yields of the conjugates were determined by measuring the peak areas of the NIR emission of 1 O 2 (1280 nm) generated by these compounds and compared to that generated by the reference standard TPP. Selected porphyrins were tested as catalysts in the photooxidation of carbonyl compounds at the α-position.
我们合成了一系列手性 A4、A2B2 和 AB3 卟啉,这些卟啉的中苯基上含有脯氨酸。光稳定性研究表明,L-脯氨酸单元的数量及其在中苯基环上的位置对催化剂的分解率有很大影响。5,10,15-Tris(mesityl)-20-(3-prolinanilidylphenyl)-21,23H-卟啉是最稳定的,而含有四个 3-prolinanilidylphenyl 取代基的卟啉在 CHCl 3 中 3 小时内完全分解。在α位羰基化合物的光氧化过程中,测试了所选卟啉的催化作用。