An original metal-free regio- and stereoselective intermolecular hydroamination of alkynes is described. Various (E)-enamines were obtained from arylacetylenes and aliphatic secondary amines in the presence of ethylene glycol as a solvent. The latter is assumed to play a major role in the mechanism through hydrogen bonding and proton exchange.
Rhodium-Catalyzed Amination of Aromatic Olefins [1]
作者:Annegret Tillack、Harald Trauthwein、Christian G. Hartung、Martin Eichberger、Stephan Pitter、Achim Jansen、Matthias Beller
DOI:10.1007/s007060070012
日期:2000.12.13
The oxidative amination of styrene with secondary amines in the presence of cationic rhodium catalysts yields regiospecifically the corresponding anti - Markovnikov enamines. Styrene as the hydrogen acceptor gave concomitantly ethylbenzene. In the presence of 1,5-cyclooctadiene ( cod ) preferential reduction to cyclooctene takes place. The addition of cod reduces the rate of the reaction, but also
Electrophoretic Dispersion Liquid and Electrophoretic Display Device
申请人:Minami Masato
公开号:US20080136772A1
公开(公告)日:2008-06-12
An electrophoretic dispersion liquid for an electrophoretic display apparatus includes a plurality of electrophoretic particles each surface of which is modified by one of a basic group and an acidic group, a liquid for holding said electrophoretic particles to be dispersed therein; and a polydiene, having the other group, dissolved in said liquid.
Catalytic Reductive Dehydration of Tertiary Amides to Enamines under Hydrosilylation Conditions
作者:Alexey Volkov、Fredrik Tinnis、Hans Adolfsson
DOI:10.1021/ol403302g
日期:2014.2.7
Tertiary amides are efficiently reduced to their corresponding enamines under hydrosilylation conditions, using a transition-metal-free catalytic protocol based on t-BuOK (5 mol %) and (MeO)(3)SiH or (EtO)(3)SiH as the reducing agent. The enamines were formed with high selectivity in good-to-excellent yields.
Anti-Markovnikov Functionalization of Olefins: Rhodium-Catalyzed Oxidative Aminations of Styrenes