Trace amount Pd(ppm)-catalyzed Sonogashira, Heck and Suzuki cross-coupling reactions based on synergistic interaction with an asymmetric conjugated pyridinespirofluorene.
A multilayer film of (Pd(2+)/)10 was simply fabricated by Pd(ii) and 2-Br-2',7,7'-tri(4-pyridyl)-9,9'-spirobifluorene (, Br-tpsf) through a layer-by-layer self-assembly method. The film loaded on a quartz slide as a catalyst reservoir could gradually release high active catalytic species to promote Sonogashira, Heck and Suzuki cross-coupling reactions, with extremely low Pd-loading of 11.0 × 10(-6) mol% and high catalytic efficiency in EtOH-H2O system.
Faculty of Materials Science and Chemical Engineering, Ningbo University, Ningbo, Zhejiang 315211, China. lixing@nbu.edu.cn.
Xing
X
Li
Jie
J
Zhang
Xiuhua
X
Zhao
Yayun
Y
Zhao
Feng
F
Li
Taohai
T
Li
Dongjie
D
Wang