Cytotoxic and apoptotic activity of nitrofuroxans on lymphoma cells
摘要:
Five nitrofuroxans were synthesized and evaluated for their in vitro cytotoxicity against human lymphoma cells with different p53 status (Raji Burkitt's lymphoma and MOLT-4). The most promising compound exhibited IC50 values of 2.6-11.0 mu M in MTT growth inhibitory assays. Flow cytometry data suggest that cytotoxic effects of given compounds in MOLT-4 cells are mediated by apoptosis via a p53-dependent pathway. Changes in nuclear morphology after treatment were evaluated by fluorescent microscopy after Hoechst staining. However, the studied nitrofuroxans did not induce apoptosis in Raji cells having the p53 mutant gene, thus suggesting a different mechanism of their action.
Side-chain prototropic tautomerism of 4-hydroxyfuroxans in methylation reactions
作者:Leonid L. Fershtat、Margarita A. Epishina、Igor V. Ovchinnikov、Marina I. Struchkova、Anna A. Romanova、Ivan V. Ananyev、Nina N. Makhova
DOI:10.1016/j.tetlet.2016.11.023
日期:2016.12
A general and simple method for the preparation of under explored 3-aryl-4-hydroxyfuroxans by nucleophilic substitution of the nitro group in 3-aryl-4-nitrofuroxans using NaOH in H2O-THF has been developed. The methylation of 3-aryl-4-hydroxyfuroxans was studied with various methylating reagents (CH2N2, MeI, (MeO)2SO2) which showed for the first time that 3-aryl-4-hydroxyfuroxans are prone to side-chain
已经开发了通过使用H 2 O-THF中的NaOH亲核取代3-芳基-4-硝基呋喃烷中的硝基来制备待探索的3-芳基-4-羟基呋喃烷的通用而简单的方法。用各种甲基化试剂(CH 2 N 2,MeI,(MeO)2 SO 2)研究了3-芳基-4-羟基呋喃恶烷的甲基化,这首次表明3-芳基-4-羟基呋喃恶烷倾向于侧-链质变互变异构。在温和条件下,合成了新型呋喃喃衍生物,N(5)-烷基化产物(3-芳基-5-甲基-1,2,5-恶二唑-4(2 H)-一2-氧化物)。与O的区域选择性形成-烷基化产物(3-芳基-4-甲氧基呋喃烷)。
Straightforward Access to the Nitric Oxide Donor Azasydnone Scaffold by Cascade Reactions of Amines
作者:Egor S. Zhilin、Dmitry M. Bystrov、Ivan V. Ananyev、Leonid L. Fershtat、Nina N. Makhova
DOI:10.1002/chem.201903526
日期:2019.11.13
construction strategy involves a diazotization/azo coupling/elimination/double rearrangement cascade sequence of readily available amines. The current protocol enables the generation of a diverse array of azasydnones, including previously hardly accessible heteroaryl substituted azasydnones (25 examples, 70-97 % yield) with a good functional group tolerance under very mild conditions. Preliminary NO-releasing
Nitrosation of salts of 1-hydroxyimino-2,2-dinitro-1-R-ethanes, a novel method for the preparation of isomeric 3(4)-nitro-4(3)-R-furoxans
作者:I. V. Ovchinnikov、A. O. Finogenov、M. A. Epishina、A. S. Kulikov、Yu. A. Strelenko、N. N. Makhova
DOI:10.1007/s11172-009-0292-z
日期:2009.10
A novel general method for the synthesis of isomeric 3(4)-nitro-4(3)-R-furoxans is developed. 3-Nitro isomers were obtained by reaction of hydroximoylchlorides with dinitromethane sodium salt followed by conversion of the resulting 1-substituted 1-hydroxyimino-2,2-dinitroethanes into dipotassium (or disodium salts) and their subsequent nitrosation with NaNO2 in AcOH or with N2O4. Thermal isomerization
A study of the reaction mechanism of 3-nitro-4-R-furoxans formation by nitrosation of dipotassium salts of 1-hydroxyimino-2,2-dinitro-1-R-ethanes
作者:I. V. Ovchinnikov、Yu. A. Strelenko、N. A. Popov、A. O. Finogenov、N. N. Makhova
DOI:10.1007/s11172-011-0134-7
日期:2011.5
The mechanism proposed earlier for explanation of the furoxan ring formation in the nitrosation of dipotassium salts of 1-hydroxyimino-2,2-dinitro-1-R-ethanes with NaNO2/AcOH was confirmed experimentally by determining the ionization constants of the dinitromethyl and oxime fragments in the starting dipotassium salt and by examining 1H, 13C, 14N, and 15N NMR and mass spectra of isomeric 3(4)-nitro-4(3)-R-furoxans