Synthesis of new pharmacologically oriented heterocyclic ensembles, [2-(1H-pyrazol-1-yl)thiazol-4-yl]furoxans
作者:Margarita A. Epishina、Alexander S. Kulikov、Leonid L. Fershtat、Ivan V. Ananyev、Nina N. Makhova
DOI:10.1016/j.mencom.2019.05.015
日期:2019.5
The effective synthesis of pharmacologically oriented heterocyclic ensembles, [2-(1H-pyrazol-1-yl)thiazol-4-yl]furoxans, comprising furoxan moiety as NO-donor and pharmacophoric pyrazolylthiazole fragment is based on the condensation of (2-hydrazinylthiazol-4-yl)furoxan hydrobromides with linear 1,3-diketones. The reaction proceeds through hydroxypyrazoline intermediate.
Synthesis of (2-bromo-2-hydroxyiminoacetyl)furazans(or furoxans) and 3,4-bis[furazanoyl(or furoxanoyl)]furoxans
作者:A. S. Kulikov、N. N. Makhova、L. I. Khmel'nitskii
DOI:10.1007/bf01169724
日期:1994.3
synthesized by nitrosation of bromoacetylfurazans and -furoxans with nitrosylsulfuric acid in conc. H2SO4 An efficient method for preparing the previously unknown 3,4-bis[furazanoyl(or furoxanoyl)]furoxans has been proposed; it consists of the reaction of acetylfurazans and acetylfuroxans with a mixture of a nitrating reagent and a catalytic amount of a nitrosating reagent in conc. H2SO4.
Effective synthesis of 6-substituted 7H-tetrazolo[5,1-b][1,3,4]thiadiazines via a one-pot condensation/nitrosation/azide-tetrazole tautomerism reaction sequence
作者:Alexander S. Kulikov、Margarita A. Epishina、Leonid L. Fershtat、Anna A. Romanova、Nina N. Makhova
DOI:10.1016/j.tetlet.2017.09.014
日期:2017.10
A new, simple, and general method for the synthesis of 6-R-7H-tetrazolo[5,1-b][1,3,4]thiadiazines (R = Ar, Het, Alk) has been developed. The described method is based on the one-pot condensation of α-haloketones with thiocarbohydrazide, nitrosation of the formed hydrazinylthiadiazine using NaNO2/HCl, and intramolecular cyclization of the nitrosation product via azide-tetrazole tautomerism. Spectroscopic
已开发出一种新颖,简单且通用的合成6-R-7 H-四唑[5,1- b ] [1,3,4]噻二嗪(R = Ar,Het,Alk)的方法。所描述的方法基于α-卤代酮与硫代碳酰肼的一锅缩合,使用NaNO 2 / HCl对形成的肼基噻二嗪进行亚硝化,以及通过叠氮化物-四唑互变异构对亚硝化产物进行分子内环化。光谱和结构研究表明,叠氮化物-四唑平衡在溶液和固态下都完全转变为四唑形式。
Reactions of bromoacetyl derivatives of furoxan and furazan with S-nucleophiles
作者:A. S. Kulikov、N. N. Makhova
DOI:10.1007/bf02495521
日期:1998.1
Hetarylthioacetyl- and (2-aminothiazol-4-yl)furoxans and the corresponding furazans unknown previously were synthesized by the reactions of substituted bromoacetylfuroxans and-furazans with hetarylthiols and thiourea, respectively.
Regioselective synthesis, structural diversification and cytotoxic activity of (thiazol-4-yl)furoxans
作者:Alexander S. Kulikov、Margarita A. Epishina、Artem I. Churakov、Lada V. Anikina、Leonid L. Fershtat、Nina N. Makhova
DOI:10.1016/j.mencom.2018.11.020
日期:2018.11
The effective and regioselective synthesis of new (2-hydrazinylthiazol-4-yl)furoxan hydrobromides based on the condensation of (bromoacetyl)furoxans with thiosemicarbazide has been developed. The cytotoxic activity of their derivatives (with hydrazone, 4-thiazolo[2.3-c][1,2,4]triazole or pyrrole moieties) against two human cancer cell lines (A549, HCT116) was tested and several structures revealed moderate cytotoxic activity.