General Copper-Catalyzed Transformations of Functional Groups from Arylboronic Acids in Water
作者:Haijun Yang、Yong Li、Min Jiang、Junmei Wang、Hua Fu
DOI:10.1002/chem.201003711
日期:2011.5.9
A simple and general copper‐catalyzed method has been developed for transformations of various functionalgroups (I, N3, SO2R, OH, NH2, and NO2) on aromatic rings fromarylboronicacids in water under air. The protocol uses cheap and readily available inorganic salts (KI, NaN3, NaSO2R, NaOH, NaNO2) and aqueous ammonia as the functional‐group sources, simple Cu2O/NH3 as the catalyst system, environmentally
简单和一般铜催化方法已被开发用于各种官能团的变换( I, Ñ 3, SO 2 R, OH, NH 2,和 NO 2)从在水中的芳基硼酸的芳环在空气中。该协议使用廉价且容易获得的无机盐(KI,NaN 3,NaSO 2 R,NaOH,NaNO 2)和氨水作为官能团来源,即简单的Cu 2 O / NH 3。作为催化剂体系,环境友好的水作为溶剂,空气中的氧气作为氧化剂。重要的是,水中的铜催化剂体系是可回收的。该研究应为芳香环上官能团的相互转化提供有用的策略。
Copper-mediated sulfonylation of aryl iodides and bromides with arylsulfonyl hydrazides in PEG-400
作者:Xiangmei Wu、Yan Wang
DOI:10.1039/c8nj00075a
日期:——
Sulfonylation using stable and readily available arylsulfonyl hydrazides and aryliodides or bromides mediated by cupric acetate has been achieved. Using polyethyleneglycol (PEG-400) as an eco-friendly medium, the couplingreaction could afford a series of unsymmetrical diaryl sulfones in moderate to good yields without the presence of additional ligands and base.
A new and efficient approach adopting copper-catalyzed cross-coupling of sulfonyl hydrazides with aryltriazenes has been developed to synthesize aryl sulfones using Brønsted acidic ionic liquid as promoter under ambient conditions. The process employs stable and easy to handle reacting partners, and is endowed with broad substrate scope.
A Simple Metal Free Oxidation of Sulfide Compounds
作者:Ravindra B. Wagh、Jayashree M. Nagarkar
DOI:10.1007/s10562-016-1932-1
日期:2017.1
AbstractThis work reports simple, efficient, selective protocol for the oxidation of sulfide compounds. Various sulfides were selectively and completely converted into their corresponding sulfoxides and sulfones using H2O2 as an oxidant in presence of catalytic amount of caprylic acid. The reaction proceeds at room temperature to give sulfoxide and by increasing the reaction temperature to 50 °C, this