Abstract A new method of Sonogashira coupling reactions between diorganyl tellurides and terminal alkynes is reported. The coupling reactions are performed using Pd(dppf)Cl2 as a catalyst, CuI as a co-catalyst in the presence of K2CO3 in DMSO. The reactions are carried out at room temperature and completed within 2 h when phenyl acetylene is used as a terminal alkyne. For aliphatic terminal alkynes
摘要 报道了一种二有机
碲化物与末端
炔烃之间Sonogashira偶联反应的新方法。偶联反应使用 Pd(dppf)Cl2 作为催化剂,CuI 作为助催化剂,在 K2CO3 的
DMSO 中进行。当
苯乙炔用作末端
炔烃时,反应在室温下进行并在2小时内完成。对于脂肪族末端
炔烃,例如
1-己炔和
1-辛炔,完成反应需要升高的温度和更长的反应时间。该方法产生了适用于二芳基、二
乙烯基和二炔基
碲化物但不适用于二烷基
碲化物的 Sonogashira 偶联产物的良好收率。图形概要