Single Nucleotide-Catalyzed Biomimetic Reductive Amination
作者:Atul Kumar、Siddharth Sharma、Ram Awatar Maurya
DOI:10.1002/adsc.201000178
日期:2010.9.10
successfully developed a single nucleotide (adenosine 5′‐diphosphate)‐catalyzed enantioselective direct reductiveamination of aldehydes and ketones using a Hantzsch ester as reducing agent. The process is a simple, efficient and a real mimic of the NADH reduction approach for the synthesis of structurally diverse amines. This reaction is the first report demonstrating the ability of a single nucleotide as catalyst
Catalyst development for organocatalytic hydrosilylation of aromatic ketones and ketimines
作者:Andrei V. Malkov、Angus J. P. Stewart-Liddon、Grant D. McGeoch、Pedro Ramírez-López、Pavel Kočovský
DOI:10.1039/c2ob25472g
日期:——
A new family of Lewis basic 2-pyridyl oxazolines have been developed, which can act as efficientorganocatalysts for the enantioselective reduction of prochiral aromatic ketones and ketimines with trichlorosilane, a readilyavailable and inexpensive reagent. 1-Isoquinolyl oxazoline, derived from mandelic acid, was identified as the most efficient catalyst of the series, capable of delivering high
Asymmetric reduction of ketimines with trichlorosilane employing an imidazole derived organocatalyst
作者:François-Moana Gautier、Simon Jones、Stephen J. Martin
DOI:10.1039/b816051a
日期:——
Organocatalysts for the asymmetric reduction of ketimines are presented that function well at low catalyst loadings providing chiral amines in good yield and enantioselectivity, the latter appearing to be independent of the ketimine substrate geometry.
Mechanistic investigations of the asymmetric hydrosilylation of ketimines with trichlorosilane reveals a dual activation model and an organocatalyst with enhanced efficiency
作者:X. Li、A. T. Reeder、F. Torri、H. Adams、S. Jones
DOI:10.1039/c6ob02537d
日期:——
Structural probes used to help elucidate mechanistic information of the organocatalyzed asymmetricketimine hydrosilylation have revealed a new catalyst with unprecedented catalytic activity, maintaining adequate performance at 0.01 mol% loading. A new ‘dual activation’ model has been proposed that relies on the presence of both a Lewis basic and Brønstedacidic site within the catalyst architecture
Sulfinamide Phosphinates as Chiral Catalysts for the Enantioselective Organocatalytic Reduction of Imines
作者:Ahmed Chelouan、Rocío Recio、Lorenzo G. Borrego、Eleuterio Álvarez、Noureddine Khiar、Inmaculada Fernández
DOI:10.1021/acs.orglett.6b01509
日期:2016.7.1
A new type of chiral sulfinamide phosphinate catalysts with up to three stereogenic centers, readily accessible from commercially available starting materials, is reported. The naphthyl derivative SulPhos proved to be highly efficient in the organocatalytic asymmetric iminereduction, leading to a wide range of arylmethylamines in high yields with up to 99% ee under 10% catalyst loading. The synthetic