A Convenient Synthesis of 1-Alkoxy-2-alkyl-1,2-dihydroisoquinoline-3,4-diones Utilizing the Reaction of 2-(Dialkoxymethyl)phenyllithiums with Dimethyl Oxalate
作者:Kazuhiro Kobayashi、Yuuya Honda、Minami Kuroda
DOI:10.1002/hlca.201500254
日期:2016.2
for the preparation of 1,2‐dihydroisoquinoline‐3,4‐diones with alkoxy and alkyl groups at the 4‐ and 3‐positions, respectively, using an easily operated three‐step sequence starting from 2‐(dialkoxymethyl)phenyl bromides has been developed. Thus, the starting materials are treated with BuLi to generate 2‐(dialkoxymethyl)phenyllithiums, which are allowed to react with (COOMe)2 to give methyl 2‐(dialk
一种新的便捷方法,可使用易于操作的从2-(二烷氧基甲基)开始的三步顺序制备分别在4和3位具有烷氧基和烷基的1,2-二氢异喹啉3,4-二酮)溴化苯已被开发出来。因此,原材料用BuLi处理生成2-(二烷氧基甲基)苯基锂,然后使其与(COOMe)2反应,生成2-(二烷氧基甲基)苯基-2-氧代乙酸甲酯。然后通过与伯胺反应将其转化为相应的仲酰胺。用催化量的TsOH·H 2处理这些酮酰胺O提供所需的产品。为了证明这些产品的合成效用,通过用PCC氧化将其中一种转化为相应的异喹啉-1,3,4(2 H)-三酮衍生物。