نتایج جستجو برای: mono and bis azodyes
تعداد نتایج: 16845678 فیلتر نتایج به سال:
Maleimido-functionalized NOTA derivatives as bifunctional chelators for site-specific radiolabeling.
Two basic and simple synthetic routes for mono- and bis-maleimide bearing 1,4,7-triazacyclononane-N,N',N''-triacetic acid (NOTA) chelators as new bifunctional chelators are described. The syntheses are characterized by their simplicity and short reaction times, as well as practical purification methods and acceptable to very good chemical yields. The usefulness of these two synthetic pathways i...
A reaction of biomass-derived aldehyde synringaldehyde and half an equivalent 1,4-dichlorobut-2-yne was attempted in order to obtain a bis-aldehyde with alkyne spacer. The carried out basic media effect bis O-alkylation, as described literature for the preparation structurally similar compounds. Nevertheless, only mono alkylation observed.
Arylimidamide (AIA) compounds containing two pyridylimidamide terminal groups (bis-AIAs) possess outstanding in vitro antileishmanial activity, and the frontrunner bis-AIA DB766 (2,5-bis[2-(2-isopropoxy)-4-(2-pyridylimino)aminophenyl]furan) is active in visceral leishmaniasis models when given orally. Eighteen compounds containing a single pyridylimidamide terminal group (mono-AIAs) were synthe...
Internal bis-substituted propargylic diols were subjected to enzymatic kinetic resolution promoted by CAL-B. Employing a two round sequence EKR, mono- and bis-acetoxy propargylic products were obtained in a high enantiomeric ratio (E > 200). The efficiently resolved chiral 8b was applied in a concise synthesis of (S)-1b, an optically active natural product produced by fungi Clitocybe catinus.
Herein we report on a series of bulky bis(alkyl)- and bis(silyl)- substituted polysilanes. Moreover, performed desilylation dechlorination experiments with them. These compounds were characterized by multinuclear NMR spectroscopy, mass spectrometry, X-ray crystallography. It was found that the selective formation silyl mono- di-anions is crucial for successful isolation these utilized multiple ...
A twisted mono-cationic bis-benzimidazolium salt was serendipitously isolated from the dehydrative condensation of 5,6-dihydroxyl-1,3-dimesityl-benzimidazolium and 1,4-benzenediboronic acid. Subsequent deprotonation of the benzimidazolium salt led to the formation of a spiroborate-linked free bis-NHC, which was further transformed into the corresponding diborane adduct and the di-Rh complex.
In a systematic effort to identify a potent anticancer agent, we synthesized 15 oxovanadium(IV) complexes and examined their cytotoxic activity against 14 different human cancer cell lines. The oxovanadium compounds included mono and bis ancillary ligands of 1,10-phenanthroline (phen) [VO(phen), VO(phen)2, VO(Me2-phen), VO (Me2-phen)2, VO(Cl-phen), VO(Cl-phen)2, VO(NO2-phen), VO(NO2-phen)2], 2,...
An effective and direct synthetic strategy for a new series of functionalized mono-, bis-, spiro[1,2,4]triazolo[1,5-a]pyridines from 1,2-diaminopyridine precursor has been described. Reaction o...
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