A series of new water‐soluble cyclopalladatedferrocenylimines were designed and prepared. They were efficientcatalyst for Suzuki coupling reactions of aryl bromides and phenylboronic acid in neat water under ambient atmosphere. Among of these catalysts, the catalyst (C2D) could be reused for 6 times for the Suzuki coupling reaction of 4‐bromotoluene with phenylboronic acid in EtOH/H2O under ambient
设计并制备了一系列新的水溶性环palpalladed二茂铁亚胺。它们是环境气氛下纯净水中芳基溴化物和苯基硼酸的Suzuki偶联反应的有效催化剂。在这些催化剂中,催化剂(c ^ 2 d)可以为用于与在EtOH苯基硼酸/ H 4-溴甲苯的Suzuki偶联反应6次重复使用2 o在环境气氛中,在其中没有任何显著损失活性Ç 2 d被观测到。
Fullerene-Catalyzed Reduction of Azo Derivatives in Water under UV Irradiation
作者:Yong Guo、Wengang Li、Jingjing Yan、Basem Moosa、Ma'an Amad、Charles J. Werth、Niveen M. Khashab
DOI:10.1002/asia.201200701
日期:2012.12
catalyst for the reduction of azo groups in basic aqueous solution underUVirradiation in the presence of NaBH4. Use of NaBH4 by itself is not sufficient to reduce the azo dyes without the assistance of a metal catalyst such as Pd and Ag. Experimental and theoretical results suggest that C60 catalyzes this reaction by using its vacant orbital to accept the electron in the bonding orbital of azo dyes, which
Reductive cleavage of azo compounds catalyzed by commercial zinc dust using ammonium formate or formic acid
作者:Shankare Gowda、K Abiraj、D.Channe Gowda
DOI:10.1016/s0040-4039(01)02370-x
日期:2002.2
Azo compounds, both symmetric and unsymmetric, are cleaved to amine(s) by using commercial zinc dust and ammonium formate or formic acid in methanol, tetrahydrofuran or dioxane at room temperature. The reductive cleavage occurs without hydrogenolysis or hydrogenation of reducible moieties, such as -OH, -CH3, -OCH3, -COOH, -COCH3, halogen, etc. The cleavage is very fast, clean, cost effective and high-yielding
Facile Transfer Hydrogenation of Azo Compounds to Hydrazo Compounds and Anilines by Using Raney Nickel and Hydrazinium Monoformate
作者:H. S. Prasad、Shankare Gowda、D. Channe Gowda
DOI:10.1081/scc-120027231
日期:2004.12.31
Abstract Azo compounds are conveniently reduced to either partially reduced hydrazo compounds or completely reduced anilines by employing Raney nickel in presence of hydrazinium monoformate depending upon reaction conditions. The other reducible moieties like ‒COOH and halogens are tolerated. The reduction process is selective, rapid and high yielding.