Coating of polydopamine on polyurethane open cell foams to design soft structured supports for molecular catalysts
作者:Ahmed Ait Khouya、Miguel L. Mendez Martinez、Philippe Bertani、Thierry Romero、Damien Favier、Thierry Roland、Valentin Guidal、Virginie Bellière-Baca、David Edouard、Loïc Jierry、Vincent Ritleng
DOI:10.1039/c9cc05379d
日期:——
A covalent grafting strategy of molecular catalysts onto a polydopamine-coated flexible three dimensional macroscopic support is presented.
一种将分子催化剂共价接枝到聚多巴胺包覆的柔性三维宏观支撑物上的策略被提出。
Catalytic Asymmetric Hiyama Cross-Couplings of Racemic α-Bromo Esters
作者:Xing Dai、Neil A. Strotman、Gregory C. Fu
DOI:10.1021/ja8009428
日期:2008.3.1
The first catalyticasymmetriccross-coupling of α-halo carbonyl compounds with aryl metal reagents has been developed, thereby generating synthetically useful α-aryl carboxylic acid derivatives in good enantiomeric excess. The method can also be applied to enantioselective alkenylation reactions.
Palladium(II)-Catalyzed Conjugate Addition of Arylsiloxanes in Water
作者:Rachel Lerebours、Christian Wolf
DOI:10.1021/ol071067v
日期:2007.7.1
Palladium-phosphinous acids catalyze the conjugateaddition of arylsiloxanes to a wide range of alpha,beta-unsaturated substrates in water. A microwave-assisted procedure is described that uses 5 mol % of POPd1 to afford beta-substituted ketones, aldehydes, esters, nitriles, and nitroalkanes in 83% to 96% yield within 4 h. This method eliminates the need for stoichiometric additives and an excess of
Synthesis and Reactivity of Functionalized Arylcopper Compounds by Transmetalation of Organosilanes
作者:Jessica R. Herron、Zachary T. Ball
DOI:10.1021/ja8070804
日期:2008.12.10
and parcel of synthetic chemistry. Organosilanes potentially represent a cheap, robust, and environmentally benign precursor to reactive organometallics, but the nature of the very stable C−Si bond has generally prevented their use as precursors to more reactive organometallics. We present investigations into a copper fluoride complex which activates organosilanes in anhydrous media under mild conditions