2-(Dialkylamino)arylacetonitriles 1 react with acetylenes 2a,b in dimethyl sulfoxide, powdered sodium hydroxide and triethylbenzylammonium chloride as a catalyst to give 3 and/or 4. The latter are formed via addition of anion 8 to immonium salt 9. The type of product formed depends on the basicity of amino moiety in 3. Furthermore, compound 1 adds to C-1 of acetylene 2c affording the vinyl derivatives 15. The products 3, 4, 11 and 15 are hydrolyzed to give ketones 5-7, 12 and 16, respectively.
2-(二烷基
氨基)芳基
乙腈1与
乙炔2a,b在
二甲基亚砜、粉末状
氢氧化钠和三乙基苄基
氯化铵催化下反应,生成3和/或4。后者通过阴离子8加成到
亚胺盐9上形成。产物的类型取决于3中
氨基部分的基本性质。此外,化合物1加成到
乙炔2c的C-1位,得到
乙烯基衍
生物15。产物3、4、11和15分别
水解得到酮5-7、12和16。