Candida antarctica B lipase catalysed resolution of (±)-1-(heteroaryl)ethylamines
摘要:
Candida antarctica B lipase is an efficient catalyst for the enantioselective acetylation of (+/-)-1-(heteroaryl)ethylamines (+/-)-1a-c. (C) 1997 Elsevier Science Ltd.
Asymmetric Synthesis of Chiral Primary Amines by Ruthenium-Catalyzed Direct Reductive Amination of Alkyl Aryl Ketones with Ammonium Salts and Molecular H<sub>2</sub>
amination of simple ketones. The strategy makes use of ammonium acetate as the amine source and H2 as the reductant and is a user-friendly and operatively simple access to industrially relevant primary amines. Excellent enantiocontrol (>90% ee for most cases) was achieved with a wide range of alkylarylketones. The practicability of this methodology has been highlighted by scalable synthesis of key intermediates
Microwave-Enhanced Asymmetric Transfer Hydrogenation of<i>N</i>-(<i>tert</i>-Butylsulfinyl)imines
作者:Óscar Pablo、David Guijarro、Miguel Yus
DOI:10.1002/ejoc.201402884
日期:2014.11
This work was generously supported by the Spanish Ministerio de Ciencia e Innovacion (MICINN) (grant numbers CONSOLIDER INGENIO 2010, CSD2007-00006, CTQ2007-65218 and CTQ2011-24151) and the Generalitat Valenciana (PROMETEO/2009/039 and FEDER). O. P. thanks the Spanish Ministerio de Educacion for a predoctoral fellowship (grant number AP-2008-00989).
A highly efficient Ru catalyst based on an achiral, very simple, and inexpensive amino alcohol ligand (2‐amino‐2‐methylpropan‐1‐ol) has been developed for the asymmetric transfer hydrogenation (ATH) of chiralN‐(tert‐butylsulfinyl)imines. This complex is able to catalyze the ATH of both aromatic and the most challenging aliphatic sulfinylimines by using isopropyl alcohol as the hydrogen source. The
[EN] PYRROLOPYRAZINE KINASE INHIBITORS<br/>[FR] INHIBITEURS DE PYRROLOPYRAZINE KINASE
申请人:HOFFMANN LA ROCHE
公开号:WO2013030138A1
公开(公告)日:2013-03-07
The present invention relates to the use of novel pyrrolopyrazine derivatives of Formula I, wherein the variables are defined as described herein, which inhibit JAK and SYK and are useful for the treatment of auto-immune and inflammatory diseases.
Synthesis of 2-Arylpiperidines via Pd-Catalyzed Arylation of Aza-Achmatowicz Rearrangement Products with Arylboronic Acids
作者:Guodong Zhao、Daniel P. Canterbury、Alexandria P. Taylor、Xiayun Cheng、Peter Mikochik、Scott W. Bagley、Rongbiao Tong
DOI:10.1021/acs.orglett.9b04220
日期:2020.1.17
aza-Achmatowicz rearrangementproducts with arylboronic acids is achieved, providing versatile 2-aryldihydropyridinones for facile synthesis of highly functionalized 2-arylpiperidines. Key to this arylation is the use of non-phosphine-ligand palladium precatalyst. The substrate scope is demonstrated with >26 examples, and the utility of 2-aryldihydropyridinones is illustrated by the synthesis of a small