A direct anionic cyclization of 2-alkynylbenzonitrile to 3-substituted-1(2H)-isoquinolones and 3-benzylideneisoindol-2-ones initiated by methoxide addition
作者:Ming-Jung Wu、Li-Juan Chang、Li-Mei Wei、Chi-Fong Lin
DOI:10.1016/s0040-4020(99)00812-1
日期:1999.11
2-(2-alkylethynyl)benzonitrile with sodium methoxide in refluxing methanol for 12 h gave 3-alkyl-1(2H)-isoquinolone in modest yield. Under the same reaction conditions, methanolysis of 2-(2-arylethynyl)benzonitrile lead to the formation of 3-alkylidene isoindol-1-one. Partial hydrolysis of 2-(1-hexynyl)benzonitrile to the corresponding benzamide, followed by treatment of the benzamide with sodium methoxide
在回流的甲醇中用甲醇钠处理2-(2-烷基乙炔基)苄腈12小时,得到3-烷基-1(2H)-异喹诺酮,收率适中。在相同的反应条件下,2-(2-芳基乙炔基)苄腈的甲醇分解导致3-亚烷基异吲哚-1-酮的形成。2-(1-己炔基)苄腈部分水解成相应的苯甲酰胺,然后在回流的甲醇中用甲醇钠处理苯甲酰胺,以49%的收率得到3-亚戊叉基异吲哚-1-酮。这表明苯甲酰胺不参与该环化反应。