FeCl2-Promoted Cleavage of the Unactivated CC Bond of Alkylarenes and Polystyrene: Direct Synthesis of Arylamines
作者:Chong Qin、Tao Shen、Conghui Tang、Ning Jiao
DOI:10.1002/anie.201202464
日期:2012.7.9
efficient and convenient nitrogenation strategy involving CCbondcleavage for the straightforward synthesis of versatile arylamines is presented. Various alkyl azides and alkylarenes, including the common industrial by‐product cumene, react using this protocol. Moreover, this method provides a potential strategy for the degradation of polystyrene.
In contrast to the recent breakthrough in electrochemical C–H aminations, the electrochemicallyoxidative C–N bondformation through a C–C bond cleavage is rarely studied. This work describes an electrochemical C–C amination of alkylarenes for the efficient synthesis of versatile anilines, as well as carbonyl compounds. With the cheap and durable graphite plates as electrodes, and in a simple undivided
Titanium-Catalyzed Hydroaminoalkylation of Alkenes by CH Bond Activation at sp<sup>3</sup>Centers in the α-Position to a Nitrogen Atom
作者:Raphael Kubiak、Insa Prochnow、Sven Doye
DOI:10.1002/anie.200805169
日期:2009.1.26
Good for primary and secondary amines: Hydroaminoalkylations of alkenes, which take place by CHbondactivation in the α‐position to nitrogen atoms, are catalyzed by various neutral titanium complexes (see scheme). Primary as well as secondary amines can be used as substrates, and the reactions can be achieved intra‐ and intermolecularly.
Process for extracting cobalt, copper or zinc values using a 1-alkyl
申请人:Imperial Chemical Industries Limited
公开号:US04039612A1
公开(公告)日:1977-08-02
Optionally substituted benzimidazoles containing an alkyl or cycloalkyl group in position 1 and containing at least 5 alkyl or cycloalkyl carbon atoms extract metals from aqueous solutions of their salts into water-immiscible organic solvents in presence of halide ion. Benzimidazoles having a branched-chain alkyl group of at least 7 carbon atoms in position 1, and especially mixtures of such compounds, are most effective. The benzimidazoles are particularly useful for extracting cobalt selectively from mixtures of cobalt and nickel salts. The metals can be recovered from the organic solvent by extraction into water free from halide ion.