Asymmetric transfer hydrogenation of quinolines using tethered Ru(II) catalysts
摘要:
The first report of an asymmetric transfer hydrogenation, in formic acid/triethylamine, of quinolines is described. Using a Ru(II) catalyst containing a 4-carbon tether, products of up to 73% ee were formed, whilst a Rh(III)-tethered catalyst gave products of up to 94% ee. (C) 2010 Elsevier Ltd. All rights reserved.
Continuous Flow Preparation of Benzylic Sodium Organometallics
作者:Johannes H. Harenberg、Rajasekar Reddy Annapureddy、Konstantin Karaghiosoff、Paul Knochel
DOI:10.1002/anie.202203807
日期:2022.7.25
A lateral sodiation of alkyl(hetero)arenes using on-demand generated (2-ethylhexyl)sodium in the presence of TMEDA is reported. Various electrophiles were used for trapping of the benzyl sodium species generated in continuous flow as well as in batch. The continuous flow metalation was scaled-up using an in-line quench. The method was used in the synthesis of several industrial relevant compounds.
of trimethylsilyliodide, the direct ortho-C–H hydroxyalkylation/methylation of aryl iodines was effectively realized via palladium/norbornene cooperative catalysis when low-cost tetrahydrofuran and 1,2-dimethoxyethane were used as alkyl sources. Heck, Suzuki, and Sonogashira coupling and hydrogenation were all compatible with the reaction as termination steps. In addition, neuromuscular agents and
A soluble iron(<scp>ii</scp>)-phthalocyanine-catalyzed intramolecular C(sp<sup>3</sup>)–H amination with alkyl azides
作者:Tingjie You、Si-Hao Zeng、Jianqiang Fan、Liangliang Wu、Fangyuan Kang、Yungen Liu、Chi-Ming Che
DOI:10.1039/d1cc04573c
日期:——
Herein, we describe a soluble iron(II)-phthalocyanine, [FeII(tBu4Pc)(py)2] (Pc = phthalocyaninato(2–)), as an effective catalyst in intramolecularC(sp3)–H bond amination, with alkyl azides as the nitrogen source, to afford the amination products in moderate to excellent yields with a broad substrate scope.
在此,我们描述了一种可溶性铁 ( II )-酞菁 [Fe II ( t Bu 4 Pc)(py) 2 ] (Pc = phthalocyaninato(2-)),作为分子内 C(sp 3 )-H的有效催化剂键胺化,以烷基叠氮化物为氮源,以中等至优异的产率提供胺化产物,底物范围广泛。
Asymmetric transfer hydrogenation of quinolines using tethered Ru(II) catalysts
作者:Vimal Parekh、James A. Ramsden、Martin Wills
DOI:10.1016/j.tetasy.2010.03.053
日期:2010.6
The first report of an asymmetric transfer hydrogenation, in formic acid/triethylamine, of quinolines is described. Using a Ru(II) catalyst containing a 4-carbon tether, products of up to 73% ee were formed, whilst a Rh(III)-tethered catalyst gave products of up to 94% ee. (C) 2010 Elsevier Ltd. All rights reserved.