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.
catalyst towards amidation of a wide range of alcohols with amines. Three newair-stable Ruthenium(II) complexes bearing bis-phenolate-N-heterocyclic carbene ligand were synthesized and characterized by FT-IR, NMR and ESI-Mass. The catalytic study of these complexes towards amidation of alcohol with amines was conducted. This new protocol is effective for many electronically diverse alcohols and amines
本贡献描述了由双酚盐-N-杂环卡宾[ t Bu(OCO)2- ](NHC)类型的三齿钳状配体支持的一族坚固的钌配合物的合成和表征。通过咪唑啉鎓配体(HL)与金属前体[RuHCl(CO)(EPh 3)2(B)的反应,以高收率合成了带有双酚盐-N-杂环卡宾配体的钌(II)配合物(1-3)。 ](E = P或As; B = PPh 3,AsPh 3或Py)从相应的银卡宾络合物中进行金属转移。所有的Ru(II)-NHC配合物均已通过元素分析,光谱方法以及ESI质谱进行了表征。根据光谱结果,为所有配合物分配了八面体几何形状。t Bu(OCO)2-配体的三齿性质以及t Bu基团提供的一定水平的空间保护可合理化本系统中Ru-C卡宾键的出色稳定性。此外,为了探索合成化合物的催化潜力,所有三种[Ru-NHC]配合物(1-3)被用作乙醇与胺酰胺化的催化剂。值得注意的是,发现配合物1对于将多种醇与胺酰胺化是非常有效和通用的催化剂。
Copper(I)-Catalyzed Reductive Cross-Coupling of<i>N</i>-Tosylhydrazones with Amides: A Straightforward Method for the Construction of C(<i>sp</i><sup>3</sup>)N Amide Bonds from Aldehydes
作者:Peng Xu、Fu-She Han、Yan-Hua Wang
DOI:10.1002/adsc.201500331
日期:2015.11.16
A method for the one-potsynthesis of substituted amidesfromaldehydes and amides is presented. Namely, condensation of aldehydes with N-tosylhydrazide generated the N-tosylhydrazones which were then reductively cross-coupled in situ with primary or secondary amides in the presence of a copper catalyst to afford secondary or tertiary amides, respectively. The reaction proceeded efficiently for a wide
General base-tuned unorthodox synthesis of amides and ketoesters with water
作者:Saikat Khamarui、Rituparna Maiti、Dilip K. Maiti
DOI:10.1039/c4cc07961b
日期:——
We discovered a highly reactive λ3-hypervalent iodane species using an inorganic/organic base for the unorthodox synthesis of amides and ketoesters through grafting terminal alkynes. In contrast to the metal-catalyzed dehydrative approaches the in situ generated nonmetallic reagent efficiently created C–N/C–O and CO bonds with amines/alkynes and water at rt.
Tandem synthesis of 1-(alkylamino)-2,4-diarylpyrimido[6,1-a]isoquinolin-5-ium chlorides from isoquinoline, N-alkyl-benzimidoyl chlorides, and isocyanides
1-(Alkylamino)-2,4-diarylpyrimido[6,1-a]isoquinolin-5-ium chlorides are obtained in good yields via a tandem reaction between isoquinoline, N-alkyl-benzimidoyl chlorides and alkyl isocyanides in anhydrous acetonitrile.
通过在无水乙腈中异喹啉,N-烷基-苯甲酰氯和烷基异氰化物之间的串联反应,可以高收率获得1-(烷基氨基)-2,4-二芳基嘧啶[6,1- a ]异喹啉-5-鎓氯化物。
Direct synthesis of amides and imines by dehydrogenative homo or cross-coupling of amines and alcohols catalyzed by Cu-MOF
作者:Soheil Zamani Anbardan、Javad Mokhtari、Ahmad Yari、Abolfazl Hassani Bozcheloei
DOI:10.1039/d1ra03142b
日期:——
homo-coupling of amines to imines and cross-coupling of amines with alcohols to amides was achieved with high to moderate yields at room temperature in THF using Cu-MOF as an efficient and recyclable heterogeneous catalyst under mild conditions. Different primary benzyl amines and alcohols could be utilized for the synthesis of a wide variety of amides and imines. The Cu-MOF catalyst could be recycled