Synthesis of a spheroidal bis-porphyrin: a ligand designed to accept two catalytic metal ions in an isolated environment
作者:Zhang Hong-Yue、Yu Jian-Qiu、Thomas C. Bruice
DOI:10.1016/s0040-4020(01)89277-2
日期:1994.1
and catalase, has been synthesized in 9 steps. C-Alkylation of 2-(2′-lithio-5′-tert-butyldimethylsiloxy-methyl)phenyl-1,3-dioxolane (D) with tetra-bromide 6, prepared from bicyclo[2.2.2]oct-7-ene-2,3,5,6-tetracarboxylic dianhydride by 5 steps, afforded the key intermediate, tetra-alkylated compound 3a, in 68% yield. An alternative route to 3, O-alkylations of tetrol 4 with aliphatic halides 5, was also
已经设计了一个球形双卟啉(双封端的四联共界面二聚四苯基卟啉,1),设计用作模拟超氧化物歧化酶和过氧化氢酶组合酶活性的一类催化剂的配体。2-(2'-锂代-5'-的C-烷基化叔-butyldimethylsiloxy甲基)苯基-1,3-二氧戊环(d)与四溴化6,从二环〔2,2,2〕辛-7-烯通过5个步骤,将-2,3,5,6-四羧酸二酐得到68%的收率的关键中间体四烷基化化合物3a。到替代路线3四醇的,O-烷基化4用的脂族卤化物5,也经过测试。四个受保护的羟基向溴取代基的转化对于卟啉2的制备至关重要。因此,制备四苄基溴化物24b,然后在三氟化硼醚化物的存在下用吡咯处理,然后进行DDQ氧化,得到封端的卟啉2。两个分子的联接2以形成球状卟啉1在稀DMF溶液中进行,使用0.8当量的2- trimethylsilylethane磺酰胺(H 2 NSO 2 CH 2 CH 2的Si(CH 3)3,SES-NH