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