Hydrogenation asymetrique en alcool de diverses cetones (aminocetones, cetols, cetoesters, cetoamides, cetothioester, cetoethers, dicetones, cetoacide) catalysee par des complexes du ruthenium(II) et du bis-diphenylphosphino-2,2' binaphtyle-1,1'
氢化 asymetrique en alcool de different cetones (aminocetones, cetols, cetoesters, cetoamides, cetothioester, cetoethers, dicetones, cetoacide) catalysee par des complexes du ruthenium(II) et du bis-diphenylphosphino-2,2'1'bina
Synthesis and Suzuki-Miyaura Cross-Coupling of Enantioenriched Secondary Potassium β-Trifluoroboratoamides: Catalytic, Asymmetric Conjugate Addition of Bisboronic Acid and Tetrakis(dimethylamino)diboron to α,β-Unsaturated Carbonyl Compounds
作者:Gary A. Molander、Steven R. Wisniewski、Mona Hosseini-Sarvari
DOI:10.1002/adsc.201300640
日期:2013.10.11
Enantioenriched potassium beta-trifluoroboratoamides have been synthesized via an asymmetric, copper-catalyzed 1,4-addition of tetrahydroxydiboron (BBA) and tetrakis(dimethylamino)diboron to alpha,beta-unsaturated amides. These dibora reagents provide access to the desired organotrifluoroborates using effective and atom economical sources of boron. The copper-catalyzed beta-boration is extended to
Kinetic resolution of 3-hydroxyalkanamides with good to high selectivities was achieved by benzoylation using copper(II) triflate and (R,R)-PhBox [2,2′-isopropylidenebis(4-phenyl-2-oxazoline)] as catalyst, which also mediated enantioselective tosylation of 2,2-bis(hydroxymethyl)alkanamides with high efficiency.
Cinquini, Mauro, Phosphorus and Sulfur and the Related Elements, 1985, vol. 24, p. 39 - 72
作者:Cinquini, Mauro
DOI:——
日期:——
<i>t</i>-Bu-QuinoxP* Ligand: Applications in Asymmetric Pd-Catalyzed Allylic Substitution and Ru-Catalyzed Hydrogenation
作者:Tsuneo Imamoto、Miwako Nishimura、Aya Koide、Kazuhiro Yoshida
DOI:10.1021/jo071192k
日期:2007.9.1
[GRAPHICS]The potential of the t-Bu-QuinoxP* ligand (1) as a chiral ligand in asymmetric synthesis was examined. The ligand exhibited good to excellent asymmetric induction in Pd-catalyzed asymmetric allylic substitution of 1,3-diphenyl-2propenyl acetate (up to 98.7% ee) and in Ru-catalyzed asymmetric hydrogenation of ketones (up to 99.9% ee).