One-pot synthesis of corrolates by cobalt catalyzed cyclization of formylpyrroles
作者:Roberto Paolesse、Emanuela Tassoni、Silvia Licoccia、Maurizio Paci、Tristano Boschi
DOI:10.1016/0020-1693(95)04747-6
日期:1996.1
2-Formylpyrroles react in the presence of cobalt ions to afford a mixture of porphyrin and corrole cobalt complexes. This is the first example of a single step synthesis of meso-unsubstituted corrole from a monopyrrole. When 3-ethyl-4-methyl-2-formylpyrrole-5-carboxylic acid was used as starting material, Co(Etioporphyrin-I) and a mixture of cobalt corrolates were obtained. Chromatographic separation
2-甲酰基吡咯在钴离子的存在下反应,得到卟啉和Corrole钴配合物的混合物。这是从单吡咯单步合成内消旋取代的甲氧基的第一个例子。当使用3-乙基-4-甲基-2-甲酰基吡咯-5-羧酸作为起始原料时,得到Co(Etioporphyrin-I)和钴酸钴的混合物。对这些化合物进行色谱分离和1 H NMR的详细分析,可将其鉴定为两种不同的乙二胺样酚。报告了可能的反应途径,解释了它们的形成。与钴不同的金属仅给出相应的卟啉配合物(Ni,Cu)。在Mn或Rh的存在下根本没有观察到环化。