[EN] PLATELET-DERIVED GROWTH FACTOR RECEPTOR (PDGFR) ALPHA INHIBITORS AND USES THEREOF [FR] INHIBITEURS DU RÉCEPTEUR DU FACTEUR DE CROISSANCE DÉRIVÉ DES PLAQUETTES (PDGFR) ALPHA ET LEURS UTILISATIONS
摘要:
The present disclosure provides compounds that can specifically target a PDGFRα, and thereby, reduce and/or inhibit the activation of the receptor ("PDGFRα inhibitor"). The present disclosure also provides methods of treating a demyelinating disease using the disclosed PDGFRα inhibitors.
Chiral Frustrated Lewis Pairs Catalyzed Highly Enantioselective Hydrosilylations of Ketones
作者:Xiaoqin Liu、Qiaotian Wang、Caifang Han、Xiangqing Feng、Haifeng Du
DOI:10.1002/cjoc.201900121
日期:2019.7
A highlyenantioselective Piers‐type hydrosilylation of simple ketones was successfully realized using a chiral frustrated Lewis pair of tri‐tert‐butylphosphine and chiral diene‐derived borane as catalyst. A wide range of optically active secondary alcohols were furnished in 80%—99% yields with 81%—97% ee's under mild reaction conditions.
an understanding of how chiral amplification is possible, in particular based on non‐lineareffects. Interestingly, it has been proposed a quarter century ago that chiral catalysts, when not enantiopure might even be more enantioselective than their enantiopure counterparts. We show here that such hyperpositive non‐linear effect in asymmetric catalysis is indeed possible. An in‐depth study into the underlying
Mn(<scp>i</scp>) phosphine-amino-phosphinites: a highly modular class of pincer complexes for enantioselective transfer hydrogenation of aryl-alkyl ketones
作者:Harikrishnan Jayaprakash
DOI:10.1039/d1dt02257a
日期:——
A series of Mn(I) catalysts with readily accessible and more π-accepting phosphine-amino-phosphinite (P′(O)N(H)P) pincer ligands have been explored for the asymmetric transferhydrogenation of aryl-alkyl ketones which led to good to high enantioselectivities (up to 98%) compared to other reported Mn-based catalysts for such reactions. The easy tunability of the chiral backbone and the phosphine moieties
一系列具有易于获得且更多π接受的膦-氨基-次亚膦酸酯(P'(O)N(H)P)钳配体的Mn( I )催化剂已被探索用于芳基烷基酮的不对称转移氢化,从而导致与其他报道的用于此类反应的锰基催化剂相比,该催化剂具有良好到高的对映选择性(高达 98%)。手性主链和膦部分的简单可调性使 P'(O)N(H)P 成为众所周知的 PNP 型钳子的替代配体框架。
6-alkyl dihydropyrazolopyrimidinone compounds as PDE2 inhibitors
申请人:Merck Sharp & Dohme Corp.
公开号:US10160762B2
公开(公告)日:2018-12-25
The present invention is directed to 6-alkyl dihydropyrazolopyrimidinone compounds of formula (I) which are useful as therapeutic agents for the treatment of central nervous system disorders associated with phosphodiesterase 2 (PDE2). The present invention also relates to the use of such compounds for treating neurological and psychiatric disorders, such as schizophrenia, psychosis, Parkinson's disease, Parkinson's disease dementia (PDD), or Huntington's disease, and those associated with striatal hypo-function or basal ganglia dysfunction.
The stereochemistry of the drug molecule is gaining greater therapeutic importance and thus much attention was drawn in synthesis of chiral compounds by the pharmaceutical industry. In this study Saccharomyces cerevisiae cells immobilized on functionalized alginate beads, catalyze the bio-reduction of prochiral ketones 1a-12a to their corresponding chiral alcohols 1b-12b in higher yields of 60-99% and.excellent optical purity 75-97%. The synthesized chiral azido alcohols 10b-12b were further subjected to hydrogenation using Palladium(Pd) nanoparticles (<= 5 nm), to obtain chiral amino alcohols 10c-12c of therapeutic importance. Thus, a simple, green and inexpensive continuous chemo-enzymatic process has been developed in the synthesis of chiral alcohols/amino alcohols to enhance the scope of the methodology towards industrial application. (C) 2016 Elsevier B.V. All rights reserved.