Asymmetric synthesis of ternaphthalenes via an ester-mediated nucleophilic aromatic substitution reaction
作者:Tetsutaro Hattori、Hiroaki Iwato、Koichi Natori、Sotaro Miyano
DOI:10.1016/j.tetasy.2004.01.021
日期:2004.3
A convenient method is presented for the asymmetric synthesis of axially chiral 1,1′:5′,1″- and 1,1′:4′,1″-ternaphthalenes via the ester-mediated nucleophilic aromatic substitution reaction. Thus, treatment of dimenthyl 1,5-dimenthoxynaphthalene-2,6-dicarboxylate 7 and its regioisomer, dimenthyl 1,4-dimenthoxynaphthalene-2,3-dicarboxylate 10, with 2-methoxynaphthalen-1-ylmagnesium bromide 12 gave enantiomerically
提出了一种方便的方法,通过酯介导的亲核芳香取代反应,不对称合成轴向手性的1,1':5',1''-和1,1':4',1''-萘。因此,治疗dimenthyl 1,5- dimenthoxynaphthalene吡啶-2,6-二羧酸的7和其部位异构体,dimenthyl 1,4- dimenthoxynaphthalene -2,3-二羧酸酯10,用2-甲氧基萘-1- ylmagnesium溴化物12,得到对映异构体和非对映体纯二薄荷基2,2''-二甲氧基-1,1':5',1''-萘2',6'-二羧酸3和二薄荷基2,2''-二甲氧基-1,1':4',1''-萘色谱纯化后,-2',3'-二羧酸4的收率分别为70%和63%。