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1
100%
Polish Journal of Chemistry
EN The reactions of two o-substituted bromoselenobenzenes: 2-(bromoseleno)benzene sulfonyl chloride and 1,2-di(bromoseleno)benzene with bisnucleophiles having amino, thiol and active methylene group have been studied. In most cases five membered rings, containing selenium as well as nitrogen and sulfur[...]
2
80%
Polish Journal of Chemistry
2007 Vol. 81, nr 8 1403-1411
EN The reactions of cyclic selenenamides: benzisoselenazol-3(2H)-ones and 1,3,2-benzodiselenazoles 3 with living cell nucleophiles such as water and thiols were investigated. Both of them caused Se–N bond cleavage. The thiolysis of 1 led to selenosulphides 6, 9 or to products of their disproportionatio[...]
3
80%
Polish Journal of Chemistry
1998 Vol. 72, nr 8 1931-1936
EN The synthesis of chiral 2,2'-diselenobisbenzoates (3) from 2-aminobenzoic acid and chiral alcohols was elaborated. Similar method was applied for the preparation of chiral 2,2'-diselenobisbenzenesulfonates (4) from 2-aminobenzenesulfonic acid. Ester 3a was an efficient catalyst for chemoselective hy[...]
4
80%
Polish Journal of Chemistry
EN The recoverable heterogeneous silica-supported catalyst selenenamide 2 was prepared by the coupling of 3-aminopropylsilicate (4)with 2-chloroselenobenzoyl chloride (6). Its catalytic activity was demonstrated in tert-butyl hydroperoxide oxidation of aldehydes 8 to carboxylic acids 9 and benzylamines[...]
5
80%
Polish Journal of Chemistry
2003 Vol. 77 / nr 11 1579-1586
EN Selenium(IV) oxide, poly(bis-1,2-phenylene) diselenide, bis[2-(N-benzisoselenazol- 3(2H)-onyl]diselenide and particularly 2-phenyl-1,2-benzisoselenazol-3(2H)-one (ebselen), were employed as the catalysts for hydrogen peroxide and t-butyl hydroperoxide oxidation of benzylamines. A reaction of primary[...]
6
80%
Wiadomości Chemiczne
EN Oxidation reactions are fundamental processes widely applied in organic synthesis. Among many reagents used in these reactions, elemental selenium and particularly some of its compounds have been reported as effective and selective oxidants and catalysts for the oxidation of various organic substrat[...]
7
80%
Polish Journal of Chemistry
EN Oxidation of 1- and 2-substituted naphthalenes (1) with 30% hydrogen peroxide in the presence of poly(bis-1,2-diphenylene) diselenide (PPDS) has been investigated. Depending on the substrate used trans-2-carboxycinnamic acid (2), and its isomer, (1-oxo-1,3-dihydroisobenzofuran-1-yl)acetic acid (3) o[...]
8
71%
Polish Journal of Chemistry
2008 Vol. 82, nr 5 1015-1022
EN Synthesis of bis(2-aminophenyl) diselenide 1 derivatives, having amino acids and dipeptides moieties, has been reported. This process has been realized by acylation of both amine groups in 1 us ing N-Boc blocked amino acids 8 in the presence of DCC and HOBT, followed by deprotection to hydrochloride[...]
9
71%
Polish Journal of Chemistry
EN The synthesis of three new groups of alkyl and aryl diselenides: 2,2'-diselenobisbenzamides, 4,4'-diselenobisbutyramides and 2,2'-di(selenomethyl)bisbenzamides designed as potential virucides and bacteriocides was elaborated. It was based on acylation of free amino group in monoprotected diamines or[...]
10
61%
Polish Journal of Chemistry
EN The reaction of title compound 6 with primary aliphatic or aromatic amines was investigated. The products were 2,2_-diselenobis(benzenesulfonamides) (4) accompanied in some cases by 1,3,2-benzothiaselenazole 1,1-dioxides (3). Exceptionally, when aniline was a reagent, 2-(sulfamoylphenyl)phenylselene[...]
11
51%
Polish Journal of Chemistry
EN Oxidation of ortho-aminophenol (1) to 2-amino-3H-phenoxazin-3-one (2) by air,manganese( IV) oxide, hydrogen peroxide or tert-butylhydroperoxide in the presence of different activators including such enzymes as laccase and peroxidase was studied. The most effective oxidants were air/Co(salen), MnO2/2[...]
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