Molybdenum-Catalyzed Diastereoselective <i>anti</i>-Dihydroxylation of Secondary Allylic Alcohols
作者:Shixia Su、Chuan Wang
DOI:10.1021/acs.orglett.9b00735
日期:2019.4.5
In this protocol, we report a Mo-catalyzed anti-dihydroxylation of secondary allylic alcohols, providing a general method for the preparation of 1,2,3-triols bearing up to three continuous stereocenters with excellent diastereocontrol. The mechanistic studies reveal that this dihydroxylation reaction consists of two steps and up to excellent diastereomeric ratios of the final triol products can be
Although it is recognized that the presence of water is disadvantageous for imine synthesis, we demonstrate that such synthesis can be effective in completely aqueous media, without any catalyst and under mild conditions. Thus, aryl-aryl, aryl-alkyl, alkyl-aryl and alkyl-alkyl monoimines as well as a large variety of diimines are obtained by direct condensation of the corresponding carbonyl compounds and amines, in water. The same process is used to synthesize macrocyclic diimines starting from methylene, ethylene, trimethylene and tetramethylene glycol bis(2-formylphenyl ether) and ethylene-, trimethylene- and tetramethylene-diamine, some of these macrocycles being known for their chelating properties.
A minimalistic approach to develop new anti-apicomplexa polyamines analogs
作者:Esteban A. Panozzo-Zénere、Exequiel O.J. Porta、Gustavo Arrizabalaga、Lucía Fargnoli、Shabana I. Khan、Babu L. Tekwani、Guillermo R. Labadie
DOI:10.1016/j.ejmech.2017.11.069
日期:2018.1
The development of new chemical entities against the major diseases caused by parasites is highly desired. A library of thirty diamines analogs following a minimalist approach and supported by chemoinformatics tools have been prepared and evaluated against apicomplexan parasites. Different member of the series of N,N′-disubstituted aliphatic diamines shown in vitroactivities at submicromolar concentrations
迫切需要开发新的化学实体来对抗寄生虫引起的主要疾病。遵循极简主义方法并在化学信息学工具的支持下,已经制备了 30 个二胺类似物的文库,并针对 apicomplexan 寄生虫进行了评估。 N , N'-二取代脂肪族二胺系列的不同成员在亚微摩尔浓度下表现出体外活性,并且对弓形虫以及对氯喹敏感和耐药的恶性疟原虫菌株具有高选择性。为了证明仲胺的重要性,合成了十种N , N , N ', N'-四取代的脂肪族二胺衍生物,其活性比它们的二取代对应物低得多。进行理论研究以确定控制化合物活性的电子因素。
Synthesis and antikinetoplastid activity of a series of N,N′-substituted diamines
作者:Andrea P. Caminos、Esteban A. Panozzo-Zenere、Shane R. Wilkinson、Babu L. Tekwani、Guillermo R. Labadie
DOI:10.1016/j.bmcl.2011.12.101
日期:2012.2
A series of 25 N,N′-substituted diamines were prepared by controlled reductive amination of free aliphaticdiamines with different substituted benzaldehydes. The library was screened in vitro for antiparasitic activity on the causative agents of human African trypanosomiasis, Chagas’ disease and visceral leishmaniasis. The most potent compounds were derived from a subset of diamines that contained