Gold-catalyzed reactions of conjugated haloacetylenes are well known and usually result in the formation of addition or dimerization products. Herein, we report a gold-catalyzed reaction of non-conjugated haloacetylenes, which leads exclusively to the halogenated cyclization products. Remarkable is the gold-catalyzed reaction of tritylhaloacetylenes to haloindene derivatives, as mechanistic studies reveal
共轭卤
乙炔的
金催化反应是众所周知的,通常会导致加成或二聚产物的形成。在此,我们报告了非共轭卤
乙炔的
金催化反应,该反应仅导致卤代环化产物。引人注目的是三苯甲基卤
乙炔与卤代
茚衍
生物的
金催化反应,因为机理研究表明,在最初形成的
金络合物中发生了1,2-芳基移位。卤原子处的潜在官能化和这些环化反应的广泛范围使其成为构建环状体系的有吸引力的方法。