Synthesis and evaluation of oryzalin analogs against Toxoplasma gondii
摘要:
The synthesis and evaluation of 20 dinitroanilines and related compounds against the obligate intracellular parasite Toxoplasma gondii is reported. Using in vitro cultures of parasites in human fibroblasts, we determined that most of these compounds selectively disrupted Toxoplasma microtubules, and several displayed sub-micromolar potency against the parasite. The most potent compound was N(1),N(1)-dipropyl-2,6-dinitro-4-(trifluoromethyl)-1,3-benzenediamine (18b), which displayed an IC(50) value of 36 nM against intracellular T. gondii. Based on these data and another recent report [Ma, C.; Tran, J.; Gu, F.; Ochoa, R.; Li, C.; Sept, D.; Werbovetz, K.; Morrissette, N. Antimicrob. Agents Chemother. 2010, 54, 1453], an antimitotic structure-activity relationship for dinitroanilines versus Toxoplasma is presented. (C) 2010 Elsevier Ltd. All rights reserved.
Selective hydrogenation of arenes to cyclohexanes in water catalyzed by chitin-supported ruthenium nanoparticles
作者:Yuna Morioka、Aki Matsuoka、Kellie Binder、Benjamin R. Knappett、Andrew E. H. Wheatley、Hiroshi Naka
DOI:10.1039/c6cy00899b
日期:——
The selective hydrogenation of aromatic compounds to cyclohexanes was found to be promoted by chitin-supported rutheniumnanoparticles (Ru/chitin) under near-neutral, aqueous conditions without the loss of C–O/C–N linkages at benzylic positions.
Chalcogen Bonding and Hydrophobic Effects Force Molecules into Small Spaces
作者:Faiz-Ur Rahman、Demeter Tzeli、Ioannis D. Petsalakis、Giannoula Theodorakopoulos、Pablo Ballester、Julius Rebek、Yang Yu
DOI:10.1021/jacs.0c01290
日期:2020.3.25
catalysis and material science. We report here the use of chalcogen bonding to form container assemblies stable in water. Cavitands 1-3 functionalized with 2,1,3-benzoselenadiazole walls were synthesized in good yields from resor-cin[4]arenes. The solid state singlecrystalX-raystructure of 3 showed a dimeric assembly cemented together through multi-ple Se⋅⋅⋅N chalcogen bonds. Binding of hydrophobic and
One-pot reductive amination of carboxylic acids: a sustainable method for primary amine synthesis
作者:Robin Coeck、Dirk E. De Vos
DOI:10.1039/d0gc01441a
日期:——
carboxylic acids is a very green, efficient and sustainable method for the production of (bio-based) amines. However, with current technology, this reaction requires two to three reaction steps. Here, we report the first (heterogeneous) catalytic system for the one-pot reductive amination of carboxylic acids to amines, with solely H2 and NH3 as the reactants. This reaction can be performed with relatively cheap
INHIBITORS OF EPOXIDE HYDROLASES FOR THE TREATMENT OF INFLAMMATION
申请人:Hammock D. Bruce
公开号:US20070117782A1
公开(公告)日:2007-05-24
The invention provides compounds that inhibit epoxide hydrolase in therapeutic applications for treating hypertension. A preferred class of compounds for practicing the invention have the structure shown by Formula 1
wherein Z is oxygen or sulfur, W is carbon phosphorous or sulfur, X and Y is each independently nitrogen, oxygen, or sulfur, and X can further be carbon, at least one of R
1
-R
4
is hydrogen, R
2
is hydrogen when X is nitrogen but is not present when X is sulfur or oxygen, R
4
is hydrogen when Y is nitrogen but is not present when Y is sulfur or oxygen, R
1
and R
3
is each independently C
1
-C
20
substituted or unsubstituted alkyl, cycloalkyl, aryl, acyl, or heterocyclic.
Selective hydrogenation of amides using Rh/Mo catalysts
作者:Graham Beamson、Adam J. Papworth、Charles Philipps、Andrew M. Smith、Robin Whyman
DOI:10.1016/j.jcat.2009.10.020
日期:2010.1
Rh/Mo catalysts formed in situ from Rh-6(CO)(16) and MO(CO)(6) are effective for the liquid phase hydrogenation of CyCONH2 to CyCH2NH2 in up to 87% selectivity, without the requirement for ammonia to inhibit secondary amine formation. Use of in situ HP-FTIR spectroscopy has shown that decomposition of metal carbonyl precursors occurs during an extended induction period, with the generation of recyclable, heterogeneous, bimetallic catalysts. Variations in Mo:Rh content have revealed significant synergistic effects on catalysis, with optimum performance at values of ca. 0.6, and substantially reduced selectivities at >= 1. Good amide conversions are noted within the reaction condition regimes 50-100 bar H-2 and 130-160 degrees C. Ex situ characterization of the catalysts, using XRD, XPS and EDX-STEM, has provided evidence for intimately mixed (ca. 2-4 nm) particles that contain metallic Rh and reduced Mo oxides, together with MoO3. Silica-supported Rh/Mo analogues, although active, perform poorly at < 150 degrees C and deactivate during recycle. (c) 2009 Elsevier Inc. All rights reserved.