A mild approach to the synthesis of 1,2-diferrocenylethanedione from ferrocenealdehyde
作者:Arruri Sathyanarayana、Paladugu Suresh、Ganesan Prabusankar
DOI:10.1016/j.jorganchem.2012.08.029
日期:2012.12
where TB = 6H,12H-5,11-methano-dibenzo[b,f][1,5]diazocine; Im = imidazolium; Mes = 2,4,6-trimethylbenzene; X = Br (4), BF4 (5) and PF6 (6) were synthesized in very good yield through simple synthetic route. 4–6 were characterized by FT-IR and multinuclear NMR. These new molecules, 4–6 were used as an organocatalyst to study the ferrocenealdehyde condensation reactions. 4–6 mediated condensation of ferrocenealdehyde
1,2-二茂铁基乙二酮(II)的合成是通过无金属途径完成的。Tröger碱官能预N-杂环卡宾,TB- [CH 2 -Im-CH 2 -Mes] 2 + 2X ¯,其中TB = 6H,12H-5,11-亚甲基-二苯并[ B,F ] [1, 5]重氮;Im =咪唑鎓; Mes = 2,4,6-三甲基苯; X = Br(4),BF 4(5)和PF 6(6)是通过简单的合成路线以很高的收率合成的。4 - 6是由FT-IR和多核NMR特征的。这些新的分子,4 -6被用作有机催化剂来研究二茂铁醛缩合反应。4 - 6介导的ferrocenealdehyde的缩合导致2-羟基-1,2-二茂铁-乙-1-酮(主要产物,的混合物我)1,2- diferrocenylethanedione(次要产物,II)。通过己烷洗涤方便地从反应混合物中分离II,而使用二氧化硅负载的柱色谱法纯化I导致I至II的定量氧化。催化剂[2