Mild Synthesis of Substituted 1,2,5-Oxadiazoles Using 1,1′-Carbonyldiimidazole as a Dehydrating Agent
作者:Andrew J. Neel、Ralph Zhao
DOI:10.1021/acs.orglett.8b00568
日期:2018.4.6
variety of 3,4-disubstituted 1,2,5-oxadiazoles (furazans) from the corresponding bisoximes at ambient temperature. This method enables these inherently energetic compounds to be prepared at temperatures well below their decomposition points and with improved functional group compatibility relative to prior methods. Conditions were developed that allowed for the first high-yielding synthesis of chlorofurazans
Tin(IV) Cyanoximates: Synthesis, Characterization, and Cytotoxicity
作者:Nikolay Gerasimchuk、Tiffany Maher、Paul Durham、Konstantin V. Domasevitch、Janet Wilking、Andrew Mokhir
DOI:10.1021/ic061354f
日期:2007.9.1
here attempts to combine the useful properties of both groups of compounds and investigate the likely antiproliferating activity of the new substances. A series of 19 organotin(IV) complexes, with nine different cyanoxime ligands, were anaerobically prepared by means of the heterogeneous metathesis reaction between the respective organotin(IV) halides (Cl, Br) and ML (M=Ag, Tl; L=cyanoximate anion), using
近年来,许多有机锡(IV)衍生物对几种类型的癌症均表现出显着的细胞毒性。但是,含氰肟基有机锡(IV)配合物的性质是未知的。以前,已经显示出氰肟显示出有趣的生物活性谱,从生长调节到抗菌和农药的解毒作用。此处提出的工作试图结合两组化合物的有用特性,并研究新物质可能的抗增殖活性。通过相应的有机锡(IV)卤化物(Cl,Br)和ML(M = Ag,Tl; L =氰肟酸根阴离子),在室温下在CH3CN中使用超声波。使用光谱方法(紫外可见,IR,1H,13C NMR,119Sn Mossbauer)和X射线分析对化合物进行表征。配合物的晶体结构揭示了两种类型的氰基亚锡锡(IV)的形成:R4-xSnLx组成的单核五配位化合物(R = Me,Et,n-Bu,Ph; x = 1,2; L =氰肟酸根阴离子)和四核R8Sn4(OH)2O2L2物种(R = n-Bu,Ph)。后者的复合物包含一个平面的[Sn4(OH)2O2]
Synthesis and Seed Germination Stimulating Activity of Some Imino Analogs of Strigolactones
Strigolactones are germination stimulants for seeds of the root parasitic weeds, Striga and Orobanche spp. The imino analog of GR24 showed moderate germination stimulating activity against the seeds of S. hermonthica. The seed germination stimulating activity of some phenyliminoacetates and phenyliminoacetonitriles was also examined. The degree of activity of the phenyliminoacetate was less than that of the phenylacrylates. On the other hand, the degree of activity of the phenyliminoacetonitrile was comparable to that of the phenylacrylonitriles. Among the tested compounds, the 3-pyridyliminoacetonitrile showed higher activity against the seeds of O. crenata than GR24. These findings demonstrate that it is not always essential to have the Michael acceptor of the C–D ring junction moiety which has been proposed to react with nucleophilic species presented at the target site to enhance the activity.
The present invention relates to therapeutically active piperidine compounds, a method of preparing the same and to pharmaceutical compositions comprising the compounds. The novel compounds are useful as stimulants of the cognitive function of the forebrain and hippocampus of mammals and especially in the treatment of Alzheimer's disease, severe painful conditions and glaucoma.
The present invention relates to therapeutically active piperidine compounds, a method of preparing the same and to pharmaceutical compositions comprising the compounds. The novel compounds are useful as stimulants of the cognitive function of the forebrain and hippocampus of mammals and especially in the treatment of Alzheimer's disease, severe painful conditions and glaucoma.