Nafion as an efficient reaction medium for diastereoselective photochemical reactions
作者:Selvanathan Arumugam
DOI:10.1016/j.tetlet.2008.02.041
日期:2008.4
The ability of alkali ion exchanged Nafion interior to enhance the influence of chiral auxiliaries in photochemical reactions was examined with three independent asymmetric photoreactions, namely, photoisomerization of trans,trans-2,3-diphenylcyclopropane-1-carboxylic acid derivatives, electro-cyclization of 2-oxo-1,2-dihydropyridine-1-acetic acid derivatives and oxa di-π methane rearrangement of 1
通过三个独立的不对称光反应,即反式,反式和反式的光异构化,研究了碱离子交换的Nafion内部增强手性助剂在光化学反应中的影响的能力。-2,3-二苯基环丙烷-1-羧酸衍生物,2-氧代-1,2-二氢吡啶-1-乙酸衍生物的电环化和1,2-二氢-2,2'的氧杂二甲基甲烷重排-二甲基萘醌衍生物。当在碱性离子交换的Nafion的纳米簇中进行光反应时,导致有机溶剂中非对映异构体1:1混合的手性助剂产生的非对映异构体过量产物为5-21%。被研究的系统也可以作为探针,以了解客体分子在被包含在Nafion框架内的分布方式。