Reactions of [2-(2-Naphthyl)phenyl]acetylenes and 2-(2-Naphthyl)benzaldehyde<i>O</i>-Phenyloximes: Synthesis of the Angucycline Tetrangulol and 1,10,12-Trimethoxy-8-methylbenzo[<i>c</i>]phenanthridine
作者:Kennedy J. Ngwira、Amanda L. Rousseau、Myron M. Johnson、Charles B. de Koning
DOI:10.1002/ejoc.201601373
日期:2017.3.17
Suzuki-Miyaura coupling reaction between 1,4,5-(trimethoxynaphthalen-2-yl)boronic acid and 2-iodo-3-methoxy-5-methylbenzaldehyde afforded intermediate, 3-methoxy-5-methyl-2-(1,4,5-trimethoxynaphthalen-2-yl)benzaldehyde. Conversion of this benzaldehyde into the alkyne, 2-(2-ethynyl-6-methoxy-4-methylphenyl)-1,4,5-trimethoxynaphthalene was accomplished utilizing the Corey-Fuchs reaction. Exposure of the derived
1,4,5-(三甲氧基萘-2-基)硼酸和2-碘-3-甲氧基-5-甲基苯甲醛之间的铃木-宫浦偶联反应得到中间体3-甲氧基-5-甲基-2-(1, 4,5-三甲氧基萘-2-基)苯甲醛。该苯甲醛转化为炔烃,2-(2-乙炔基-6-甲氧基-4-甲基苯基)-1,4,5-三甲氧基萘是利用 Corey-Fuchs 反应完成的。将衍生的乙炔暴露于催化铂 (II) 介导的闭环产生所需的四环芳烃产物 1,7,8,12-四甲氧基-3-甲基四苯,其转化为四丁醇。将相关的 3-甲氧基-5-甲基-2-(1,4,5-三甲氧基萘-2-基)苯甲醛邻苯基肟在离子液体中暴露于微波辐射下产生 1,10,12-三甲氧基-8-甲基苯并[c]菲啶,