60565-73-3

Upstream product

• 7782-49-2 selenium 
• 67-66-3 chloroform 
• 100-46-9 benzylamine 
• 100-44-7 benzyl chloride 
• 6343-54-0 N-benzylformamide 
• 4671-93-6 benzyl selenocyanate 
• 506-80-9 carbon diselenide 

Downstream Products

• 67766-79-4 benzyl-(3,4,4-trimethyl-5-methylene-selenazolidin-2-ylidene)-amine 
• 67971-76-0 benzyl-(4-ethyl-4-methyl-5-methylene-4,5-dihydro-selenazol-2-yl)-amine 
• 67766-80-7 benzyl-(4-ethyl-3,4-dimethyl-5-methylene-selenazolidin-2-ylidene)-amine 
• 1167976-65-9 (Z)-N-(1,3-oxaselenepan-2-ylidene)-1-phenylmethanamine 
• 1171165-92-6 3-benzyl-2-selenoxoperhydro-1,3-selenazin-4-one 
• 1332566-35-4 5-amino-N,1-dibenzyl-3-phenyl-2-selenoxo-2,3-dihydro-1H-imidazole-4-carboselenoamide 
• 1332566-40-1 5-amino-N,1-dibenzyl-3-methyl-2-selenoxo-2,3-dihydro-1H-imidazole-4-carboselenoamide 
• 1356922-93-4 4-benzylamino-2-hydroselenoquinazoline 
• 1430231-37-0 3-benzyl-2-selenoimidazolidin-4-one 

Relevant academic research and scientific papers

Synthesis and leishmanicidal activity of novel urea, thiourea, and selenourea derivatives of diselenides

A novel series of thirty-one N-substituted urea, thiourea, and selenourea derivatives containing diphenyldiselenide entities were synthesized, fully characterized by spectroscopic and analytical methods, and screened for their in vitro leishmanicidal activities. The cytotoxic activity of these derivatives was tested against Leishmania infantum axenic amastigotes, and selectivity was assessed in human THP-1 cells. Thirteen of the synthesized compounds showed a significant antileishmanial activity, with 50% effective concentration (EC50) values lower than that for the reference drug miltefosine (EC50, 2.84 M). In addition, the derivatives 9, 11, 42, and 47, with EC50 between 1.1 and 1.95 M, also displayed excellent selectivity (selectivity index ranged from 12.4 to 22.7) and were tested against infected macrophages. Compound 11, a derivative with a cyclohexyl chain, exhibited the highest activity against intracellular amastigotes, with EC50 values similar to those observed for the standard drug edelfosine. Structure-activity relationship analyses revealed that N-aliphatic substitution in urea and selenourea is recommended for the leishmanicidal activity of these analogs. Preliminary studies of the mechanism of action for the hit compounds was carried out by measuring their ability to inhibit trypanothione reductase. Even though the obtained results suggest that this enzyme is not the target for most of these derivatives, their activity comparable to that of the standards and lack of toxicity in THP-1 cells highlight the potential of these compounds to be optimized for leishmaniasis treatment.

Novel 1,3,4-Selenadiazole-Containing Kidney-Type Glutaminase Inhibitors Showed Improved Cellular Uptake and Antitumor Activity

Kidney-type glutaminase [KGA/isoenzyme glutaminase C (GAC)] is becoming an important tumor metabolism target in cancer chemotherapy. Its allosteric inhibitor, CB839, showed early promise in cancer therapeutics but limited efficacy in in vivo cancer models. To improve the in vivo activity, we explored a bioisostere replacement of the sulfur atom in bis-2-(5-phenylacetamido-1,2,4-thiadiazol)ethyl sulfide and CB839 analogues with selenium using a novel synthesis of the selenadiazole moiety from carboxylic acids or nitriles. The resulting selenadiazole compounds showed enhanced KGA inhibition, more potent induction of reactive oxygen species, improved inhibition of cancer cells, and higher cellular and tumor accumulation than the corresponding sulfur-containing molecules. However, both CB839 and its selenium analogues show incomplete inhibition of the tested cancer cells, and a partial reduction in tumor size was observed in both the glutamine-dependent HCT116 and aggressive H22 liver cancer xenograft models. Despite this, tumor tissue damage and prolonged survival were observed in animals treated with the selenium analogue of CB839.

Thermal stability and decomposition of urea, thiourea and selenourea analogous diselenide derivatives

The fusion and thermal decomposition of thirty-three diselenide compounds with a urea, thiourea or selenourea group linked with different aliphatic or aromatic substituents have been studied by thermogravimetry, differential scanning calorimetry and mass spectrometry in order to perform comparative thermal stability studies among analogs. A relationship has been found between stability and a series of effects which occur in the compound structures. Analysis of the thermal data indicated that: (a) in general, compounds with a urea or selenourea group are more stable than those with a thiourea group; (b) no difference in stability exists when an aromatic or aliphatic group is linked to the thiourea group but when linked to the urea or selenourea groups, stability does differ; (c) selenourea compounds with aliphatic chain are the most unstable; and (d) the nature of the substituent located on the benzyl ring has no effects on thermal stability. Therefore, criteria for the selection of substituents can be established in order to improve the stability of these drugs. In addition, the mass spectral fragmentation in comparison with thermal analytical data helps in confirming the thermal behavior of the compounds.

Synthesis of Isoselenocyanates

Isoselenocyanates were synthesized by two methods under phase-transfer conditions (50% aq NaOH, CH2Cl2, Aliquat 336); the first started from isocyanides and selenium and gave isoselenocyanates in 61-89% yields, while the second started from amines and used chloroform and selenium, by applying sequentially the Hofmann isonitrile synthesis and the addition of selenium, in 4-70% yields.

1-Substituted-5-[(3,5-dinitrobenzyl)sulfanyl]-1H-tetrazoles and their isosteric analogs: A new class of selective antitubercular agents active against drug-susceptible and multidrug-resistant mycobacteria

In this work, a new class of highly potent antituberculosis agents, 1-substituted-5-[(3,5-dinitrobenzyl)sulfanyl]-1H-tetrazoles and their oxa and selanyl analogs, is described. The minimal inhibitory concentration (MIC) values reached 1 μM (0.36-0.44 μg/mL) against Mycobacterium tuberculosis CNCTC My 331/88 and 0.25-1 μM against six multidrug-resistant clinically isolated strains of M. tuberculosis. The antimycobacterial effects of these compounds were highly specific because they were ineffective against all eight bacterial strains and eight fungal strains studied. Furthermore, these compounds exhibited low in vitro toxicity in four mammalian cell lines (IC50 > 30 μM). We also examined the structure-activity relationships of the compounds, particularly the effects on antimycobacterial activity of the number and position of the nitro groups, the linker between tetrazole and benzyl moieties, and the tetrazole itself. Relatively high variability of substituent R 1 on the tetrazole in the absence of negative effects on antimycobacterial activity allows further structural optimization with respect to toxicity and the ADME properties of the 1-substituted-5-[(3,5-dinitrobenzyl) sulfanyl]-1H-tetrazoles lead compounds.

Sulfur and selenium derivatives of quinazoline and pyrido[2,3-d]pyrimidine: Synthesis and study of their potential cytotoxic activity in vitro

The synthesis, cytotoxic activities and selectivities of 35 derivatives related to quinazoline and pyrido[2,3-d]pyrimidine are described. The synthesized compounds were screened in vitro against four tumoral cell lines - leukemia (CCRF-CEM), colon (HT-29), lung (HTB-54) and breast (MCF-7) - and two cell lines derived from non-malignant cell lines, one mammary (184B5) and one from bronchial epithelium (BEAS-2B). MCF-7 and HTB-54 were the most sensitive cell lines with GI50 values below 10 μM for eleven and ten compounds, respectively. Two compounds (2o and 3a) were identified that evoked a marked cytotoxic effect in all cell lines tested and one compound, 7h, was potent and selective against MCF-7. A preliminary study into the mechanism of the potent derivatives 2o, 3a and 7h indicated that the cytotoxic activities of these compounds might be mediated by inducing cell death without affecting cell cycle phases.

Synthesis and anticancer activity comparison of phenylalkyl isoselenocyanates with corresponding naturally occurring and synthetic isothiocyanates

Synthesis and identification of novel phenylalkyl isoselenocyanates (ISCs), isosteric selenium analogues of naturally occurring phenylalkyl isothiocyanates (ITCs), as effective cytotoxic and antitumor agents are described. The structure - activity relationship comparison of ISCs with ITCs and effect of the increasing alkyl chain length in inhibiting cancer cell growth were evaluated on melanoma, prostate, breast, glioblastoma, sarcoma, and colon cancer cell lines. IC50 values for ISC compounds were generally lower than their corresponding ITC analogues. Similarly, in UACC 903 human melanoma cells, the inhibition of cell proliferation and induction of apoptosis were more pronounced with ISCs compared to ITCs. Further, ISCs and ITCs effectively inhibited melanoma tumor growth in mice following intraperitoneal xenograft. A similar reduction in tumor size was observed at 3 times lower doses of ISCs compared to corresponding ITCs.

ANTI-CANCER COMPOSITIONS AND METHODS

Anti-cancer compositions and methods are described including one or more isothiocyanates and/or isoselenocyanates. Methods of treating a subject are provided according to embodiments of the present invention which include administering a therapeutically e

One-pot synthesis of 2-imino-1,3-selenazolidines by reaction of isoselenocyanates with propargylamine

One-pot synthesis of 2-imino-5-methylene-1,3-selenazolidines has been achieved by reactions of alkylisoselenocyanates with propargylamines in high yields. 1H NMR and NOESY experiments were used to explain the selenium coupling with hydrogen of

Synthesis of the Heteroaromatic Selenatriazole Ring System. 5-Amino-1,2,3,4-selenatriazoles

The synthesis of 5-amino-1,2,3,4-selenatriazoles, derivatives of the hitherto unknown selenatriazole ring system, is described.Reaction between bis(N,N-disubstituted selenocarbamoyl)selenides and azide ion gives the title compounds in good yield.The reactions of 4,4-dialkylselenosemicarbazides with nitrous acid or an aza-transfer reagent also lead to aminoselenatriazoles.Disubstituted aminoselenatriazoles are thermally unstable decomposing with formation of disubstituted cyanamides, nitrogen and selenium. 5-(Diethylamino)selenatriazole (half-life ca. 180 h in CHCL3 at 20 deg C) is thermally more stable than 5-(methylphenylamino)selenatriazole. 5-(Alkylamino)selenatriazoles decompose to hydrazoic acid and an isoselenocyanate, and evidence for their formation was only obtained indirectly.