tetraphenylporphyrin. Quantum mechanical calculations revealed that it has a low LUMO level of −3.2 eV. The meso-aryl-5-oxaporphyrin copper complex underwent alcoholysis to yield 19-alkoxybilinone. Nucleophilic ring-opening of the 5-oxaporphyrin copper complexes with OH−, CH3O−, and C2H5O− gave bilindione, 19-methoxybilinone, and 19-ethoxybilinone, respectively, indicating that they are valuable precursors
通过在
三氟乙酸存在下用H 2 O 2或间-
氯过氧
苯甲酸氧化双三酮
铜,制备在中间位置具有苯基、4-甲氧羰基苯基和4-
氯苯基的5-氧杂
卟啉铜络合物。产率为 78% (COOMe)、88% (H) 和 43% (Cl)。5-氧杂
卟啉铜络合物是一种阳离子物质,其氧化还原电位比
四苯基卟啉铜更正(约 0.7 V)。量子力学计算表明它的 LUMO 能级很低,为 -3.2 eV。内消旋-芳基-5-氧杂
卟啉铜络合物经醇解产生19-烷氧基
胆碱酮。5-氧杂
卟啉铜配合物与 OH 的亲核开环-、CH 3 O -和C 2 H 5 O -分别产生联
茚二酮、19-甲氧基胆酮和19-乙氧基胆酮,表明它们是线性四
吡咯的有价值的前体。