Synthesis of type III isomers of diacetyldeutero-, hemato-, and protoporphyrins with the use of Knorr's pyrrole
作者:Saburo Neya、Tomoki Yoneda、Tyuji Hoshino、Akira T. Kawaguchi、Masaaki Suzuki
DOI:10.1016/j.tet.2016.05.030
日期:2016.7
Derivation of the Knorr's pyrrole with 2-ethyl and 4-benzyl mixed-ester groups into 3,3′-diacetyl-5,5′-diiodo-4,4′-dimethyl-2,2′-dipyrromethane was developed. Coupling of the dipyrromethane with 5,5′-diformyl-3,3′-bis(2-methoxycarbonylethyl)-4,4′-dimethyl-2,2′-dipyrro-methane afforded in a reasonable yield diacetyldeuteroporphyin III with C2v symmetry. The porphyrin was further converted to protoporphyrin
开发了将带有2-乙基和4-苄基混合酯基团的克诺尔吡咯衍生为3,3'-二乙酰基-5,5'-二碘代-4,4'-二甲基-2,2'-二吡咯甲烷。二吡咯甲烷与5,5'-二甲酰基-3,3'-双(2-甲氧基羰基乙基)-4,4'-二甲基-2,2'-二吡咯甲烷的偶联以合理的收率提供了C 2v对称的二乙酰基氘卟啉III 。通过血卟啉III将卟啉进一步转化为原卟啉III。利用容易获得的克诺尔吡咯作为起始原料,极大地方便了获得对称的铁卟啉,而铁蛋白没有血红蛋白袋中的定向障碍。