HYDROGENATION OF ESTERS OR CARBONYL GROUPS WITH PHOSPHINO-OXIDE BASED RUTHENIUM COMPLEXES
申请人:Saudan Lionel
公开号:US20110190523A1
公开(公告)日:2011-08-04
The present invention relates to the field of catalytic hydrogenation and, more particularly, to the use of specific ruthenium catalysts or pre-catalysts in hydrogenation processes for the reduction of ketones, aldehydes, esters or lactones into their corresponding alcohols or diols respectively. The preferred catalysts are ruthenium complexes comprising a ligand of the type (N—N) type and a ligand of the type (P—PO).
SELECTIVE HYDROGENATION OF ALDEHYDE WITH RU/BIDENTATE LIGANDS COMPLEXES
申请人:FIRMENICH SA
公开号:US20140243526A1
公开(公告)日:2014-08-28
The present invention relates to processes for the reduction by hydrogenation, using molecular H
2
, of a C
5
-C
20
substrate containing one or two aldehydes functional groups into the corresponding alcohol or diol, characterized in that said process is carried out in the presence of —at least one catalyst or pre-catalyst in the form of a ruthenium complex having a coordination sphere of the N
2
P
2
O
2
, wherein the coordinating atoms N
2
are provided by a first bidentate ligand, the coordinating atoms P
2
are provided by a second bidentate ligand and the coordinating atoms O
2
are provided by two non-linear carboxylate ligands; and —optionally of an acidic additive.
functionalized diheteroaryl and diaryl ketones was developed using Ru-catalysts of minimal stereogenicity. Various ketone substrates with structurally and electronically similar groups attached to the prochiral centers were reduced successfully in good to excellent enantioselectivities and yields. This protocol provides practical and efficient access to chiral diheteroarylmethanols and benzhydrols,
[EN] DOPAMINE D2 RECEPTOR LIGANDS<br/>[FR] LIGANDS DU RÉCEPTEUR D2 DE LA DOPAMINE
申请人:BROAD INST INC
公开号:WO2016100823A1
公开(公告)日:2016-06-23
The present invention relates to novel dopamine D2 receptor ligands. The invention further relates to functionally-biased dopamine D2 receptor ligands and the use of these compounds for treating or preventing central nervous system and systemic disorders associated with dysregulation of dopaminergic activity.
Picolinamide Ligands: Nickel‐Catalyzed Reductive Cross‐Coupling of Aryl Bromides with Bromocyclopropane and Beyond
作者:Dongyang Han、Jie Sun、Jian Jin
DOI:10.1002/asia.202201132
日期:2023.1.17
The arylcyclopropane motif as the combination of aryl and cyclopropyl ring systems can be found in an increasing amount of approved and investigational drugs. Herein, we have developed a mild, efficient nickel-catalyzed reductive cross-coupling protocol, featuring a simple Ni(II) precatalyst, a novel picolinamide NN2 pincer ligand. Notably, the reaction is tolerant of a broad range of functionalities
芳基环丙烷基序作为芳基和环丙基环系统的组合,可以在越来越多的批准和研究药物中找到。在此,我们开发了一种温和、高效的镍催化还原交叉偶联方案,其特点是一种简单的 Ni(II) 预催化剂,一种新型吡啶酰胺 NN 2钳形配体。值得注意的是,该反应对包括游离胺在内的广泛功能具有耐受性。