Analogues of Fenarimol Are Potent Inhibitors of Trypanosoma cruzi and Are Efficacious in a Murine Model of Chagas Disease
摘要:
We report the discovery of nontoxic fungicide fenarimol (1) as an inhibitor of Trypanosoma cruzi (T. cruzi), the causative agent of Chagas disease, and the results of structure-activity investigations leading to potent analogues with low nM IC(50)s in a T. cruzi whole cell in vitro assay. Lead compounds suppressed blood parasitemia to virtually undetectable levels after once daily oral dosing in mouse models of T. cruzi infection. Compounds are chemically tractable, allowing rapid optimization of target biological activity and drug characteristics. Chemical and biological studies undertaken in the development of the fenarimol series toward the goal of delivering a new drug candidate for Chagas disease are reported.
Use of Pyrimidine Derivatives in the Manufacture of a Medicament for Prevention and/or Treatment of Alzheimer's Disease
申请人:Andersson Lars
公开号:US20080214560A1
公开(公告)日:2008-09-04
Pyrimidine derivatives of formula I,
wherein R
1
, R
2
, R
3
, R
4
, R
5
, R
6
, R
7
, R
8
and R
9
are as defined in the specification, as a base or a pharmaceutically acceptable salt thereof in the manufacture of pharmaceutical compositions and in the treatment or prophylaxis of Alzheimer's Disease.
The carbonylative Suzuki cross-coupling reaction of arylboronic acid with aryl and heteroaryl iodides using polymer supported palladium-N-heterocyclic carbene complex (PS-Pd-NHC) as an efficient heterogeneous, recyclable catalyst is described. The developed catalyticsystem is found to be effective for the carbonylative coupling reaction of aryl, heteroaryl, and bicyclic heteroaryl iodides (5-iodoindole
Pd/C: An Efficient, Heterogeneous and Reusable Catalyst for Phosphane-Free Carbonylative Suzuki Coupling Reactions of Aryl and Heteroaryl Iodides
作者:Mayur V. Khedkar、Pawan J. Tambade、Ziyauddin S. Qureshi、Bhalchandra M. Bhanage
DOI:10.1002/ejoc.201001134
日期:2010.12
The carbonylativeSuzukicouplingreaction of aryl boronic acid with different aryl and heteroaryliodides was carried out to synthesize various unsymmetrical biaryl ketones by using Pd/C as an efficient, heterogeneous and reusable catalyst. The catalyst exhibits remarkable activity, and its reusability was tested up to four consecutive cycles. The reaction is applicable for various aryl and heteroaryl
Construction of Chiral Tetrahydro-β-Carbolines: Asymmetric Pictet-Spengler Reaction of Indolyl Dihydropyridines
作者:Shou-Guo Wang、Zi-Lei Xia、Ren-Qi Xu、Xi-Jia Liu、Chao Zheng、Shu-Li You
DOI:10.1002/anie.201703178
日期:2017.6.19
A highly efficient synthesis of the enantioenriched tetrahydro-β-carbolines was developed by using a chiral phosphoric acid catalyzed Pictet–Spengler reaction of indolyl dihydropyridines. The reaction proceeds under mild reaction conditions to afford the desired chiral tetrahydro-β-carbolines in good to excellent yields (up to 96 %) and high enantioselectivities (up to 99 % ee). With this method, a
Ligand-Free Pd-Catalyzed Carbonylative Cross-Coupling Reactions under Atmospheric Pressure of Carbon Monoxide: Synthesis of Aryl Ketones and Heteroaromatic Ketones
作者:Hongling Li、Min Yang、Yanxing Qi、Jijun Xue
DOI:10.1002/ejoc.201001685
日期:2011.5
The carbonylative Suzuki cross-coupling reactions of boronic acids with aryl iodides catalyzed by Pd 2 (dba) 3 as a ligand-free catalyst under atmospheric pressure of carbonmonoxide has been firstly developed. Under mild reaction conditions, a broad range of aryl/heteroaryl iodides and aryl/heteroaryl boronic acids were selectively coupled to afford the corresponding diaryl ketones in good to excellent