Approach to Chiral 1-Substituted Isoquinolone and 3-Substituted Isoindolin-1-one by Addition–Cyclization Process
作者:Wen Zhou、Yan-Xue Zhang、Xiao-Di Nie、Chang-Mei Si、Xun Sun、Bang-Guo Wei
DOI:10.1021/acs.joc.8b01282
日期:2018.9.7
An approach to access 1-substituted isoquinolones has been developed through the addition–cyclization of imines with Grignard reagents in the presence of 2,2′-dipyridyl. A number of substituted aromatic magnesium reagents were amenable to this process, and the desired products were obtained with excellent yields and outstanding diastereoselectivities (dr > 99:1). The utility of this convenient approach
通过在2,2'-联吡啶存在下,用格氏试剂对亚胺进行加成环化反应,已经开发了一种获得1-取代异喹诺酮的方法。许多取代的芳族镁试剂都适用于此过程,并以优异的收率和出色的非对映选择性(dr > 99:1)获得了所需的产物。这种便利方法的实用性通过(S)-cryptostyline II的形式合成得到证明。此外,使用格氏试剂一锅加成-环化-亚胺脱保护,发现N-甲基吗啉(NMM)是形成3取代异吲哚啉-1-酮的有效添加剂。