Palladium-Catalyzed C–H Arylation of Benzofurans with Triarylantimony Difluorides for the Synthesis of 2-Arylbenzofurans
作者:Yuki Kitamura、Yuki Murata、Mizuki Iwai、Mio Matsumura、Shuji Yasuike
DOI:10.3390/molecules26010097
日期:——
substances. Herein, the reaction of triarylantimony difluorides with benzofurans under aerobic conditions in 1,2-DCE, using 5 mol% Pd (OAc)2 and 2 eq. of CuCl2 at 80 °C, produced a variety of 2-arylbenzofurans in moderate-to-high yields. The reaction is sensitive to the electronic nature of the substituents on the benzene ring of the triarylantimony difluorides: an electron-donating group showed higher reactivity
Pd 催化的区域选择性 C-H 芳基化是芳香杂环化学修饰的有用工具,2-芳基苯并呋喃衍生物作为生物活性物质受到关注。本文中,使用 5 mol% Pd (OAc)2 和 2 eq.,在 1,2-DCE 中的有氧条件下,三芳基锑二氟化物与苯并呋喃的反应。 CuCl2 在 80 °C 下生成多种 2-芳基苯并呋喃,产率中等至较高。该反应对三芳基二氟化锑苯环上取代基的电子性质敏感:给电子基团比吸电子基团表现出更高的反应性。三(对甲基苯基)二氟化锑的单晶X射线分析表明,中心锑原子呈现三角双锥几何形状。