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Processes in the H2PtCl6·6H2O–Solvent Systems. Part 2: Methylvinylsiloxane Solutions H2PtCl6·6h2o -溶剂体系中的工艺。第2部分:甲基乙烯硅氧烷溶液
IF 0.8 4区 化学
Doklady Chemistry Pub Date : 2023-02-15 DOI: 10.1134/S0012500822600377
N. V. Klimova, A. G. Ivanov, A. V. Lebedev,  P. A. Storozhenko
{"title":"Processes in the H2PtCl6·6H2O–Solvent Systems. Part 2: Methylvinylsiloxane Solutions","authors":"N. V. Klimova,&nbsp;A. G. Ivanov,&nbsp;A. V. Lebedev,&nbsp; P. A. Storozhenko","doi":"10.1134/S0012500822600377","DOIUrl":"10.1134/S0012500822600377","url":null,"abstract":"<p>Redox processes in the H<sub>2</sub>PtCl<sub>6</sub>·6H<sub>2</sub>O–1,1,3,3-tetramethyl-1,3-divinyldisiloxane system both in the presence of ethanol and trimethylchlorosilane, and in the absence thereof were studied by <sup>1</sup>Н, <sup>13</sup>С, and <sup>29</sup>Si NMR spectroscopy and gas–liquid chromatography. It was found for the first time that Pt(IV) and Pt(II) chlorides catalyze the reactions of hydrochlorination of vinyl groups with their transformation into β-chloroethyl groups and the elimination of the latter to form ethylene and dimethylchlorosilanes. Based on the results obtained, it was assumed that Pt(0) is coordinated to the siloxane group. A method to produce a high-temperature hydrosilylation catalyst consisting of nanosized Pt(0) and trimethylsilylsilicate was proposed and successfully tested in practice for curing SIEL-type compounds.</p>","PeriodicalId":530,"journal":{"name":"Doklady Chemistry","volume":"506 2","pages":"216 - 222"},"PeriodicalIF":0.8,"publicationDate":"2023-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4603430","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The Synthetic Approaches to (3-Thienyl)-Containing 2,2'-Bipyridines as Potential Monomers for Electropolymerization 含(3-噻吩基)2,2'-联吡啶电聚合单体的合成方法
IF 0.8 4区 化学
Doklady Chemistry Pub Date : 2023-02-15 DOI: 10.1134/S0012500822700100
A. P. Krinochkin, M. I. Valieva, E. S. Starnovskaya, Ya. K. Shtaitz, S. S. Rybakova, E. R. Sharafieva, D. S. Kopchuk, G. V. Zyryanov,  V. L. Rusinov
{"title":"The Synthetic Approaches to (3-Thienyl)-Containing 2,2'-Bipyridines as Potential Monomers for Electropolymerization","authors":"A. P. Krinochkin,&nbsp;M. I. Valieva,&nbsp;E. S. Starnovskaya,&nbsp;Ya. K. Shtaitz,&nbsp;S. S. Rybakova,&nbsp;E. R. Sharafieva,&nbsp;D. S. Kopchuk,&nbsp;G. V. Zyryanov,&nbsp; V. L. Rusinov","doi":"10.1134/S0012500822700100","DOIUrl":"10.1134/S0012500822700100","url":null,"abstract":"<p>The efficient synthetic approaches to new 2,2'-bipyridine ligands functionalized with a 3-thienyl moiety have been developed. These compounds are of interest as monomeric units for electropolymerization. The “1,2,4-triazine” methodology was used for the synthesis.</p>","PeriodicalId":530,"journal":{"name":"Doklady Chemistry","volume":"506 1","pages":"196 - 201"},"PeriodicalIF":0.8,"publicationDate":"2023-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4604532","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Tacrine Derivatives Containing an Antioxidant Moiety 含有抗氧化基团的塔克林衍生物
IF 0.8 4区 化学
Doklady Chemistry Pub Date : 2023-02-15 DOI: 10.1134/S0012500822700094
I. V. Serkov, A. N. Proshin, N. V. Kovaleva, N. P. Boltneva, E. V. Rudakova, G. F. Makhaeva,  S. O. Bachurin
{"title":"Tacrine Derivatives Containing an Antioxidant Moiety","authors":"I. V. Serkov,&nbsp;A. N. Proshin,&nbsp;N. V. Kovaleva,&nbsp;N. P. Boltneva,&nbsp;E. V. Rudakova,&nbsp;G. F. Makhaeva,&nbsp; S. O. Bachurin","doi":"10.1134/S0012500822700094","DOIUrl":"10.1134/S0012500822700094","url":null,"abstract":"<p>An approach was developed for the synthesis of multitarget compounds based on a tacrine molecule conjugated with a vanillin moiety using alkylimine or alkylamine linkers with different alkyl chain lengths (C2–C4). The synthesized conjugates effectively inhibit cholinesterases, displace propidium from the peripheral anionic site of acetylcholinesterase, which implies potential antiaggregant properties, and exhibit high antioxidant activity.</p>","PeriodicalId":530,"journal":{"name":"Doklady Chemistry","volume":"506 1","pages":"190 - 195"},"PeriodicalIF":0.8,"publicationDate":"2023-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4603411","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Synthesis of 1-Substituted 3H-Naphtho[1,2,3-de]quinoline-2,7-diones 1-取代3h -萘醌[1,2,3-de] 2,7-二酮的合成
IF 0.8 4区 化学
Doklady Chemistry Pub Date : 2023-02-15 DOI: 10.1134/S0012500822700112
S. A. Chernenko, A. L. Shatsauskas, A. S. Kostyuchenko, A. S. Fisyuk
{"title":"Synthesis of 1-Substituted 3H-Naphtho[1,2,3-de]quinoline-2,7-diones","authors":"S. A. Chernenko,&nbsp;A. L. Shatsauskas,&nbsp;A. S. Kostyuchenko,&nbsp;A. S. Fisyuk","doi":"10.1134/S0012500822700112","DOIUrl":"10.1134/S0012500822700112","url":null,"abstract":"<p>A method for preparing 1-tosyl-3<i>H</i>-naphtho[1,2,3-<i>de</i>]quinoline-2,7-diones by the reaction of <i>N</i>-(9,10-anthraquinon-1-yl)chloroacetamide with sodium <i>p</i>-toluenesulfinate has been developed. Nucleophilic substitution of the tosyl group by nitrogen and oxygen nucleophiles has been found to proceed under mild conditions. The corresponding 1-substituted 3<i>H</i>-naphtho[1,2,3-<i>de</i>]quinoline-2,7-diones have been obtained by the reaction of these compounds with amines, phenol, sodium hydroxide, and sodium azide.</p>","PeriodicalId":530,"journal":{"name":"Doklady Chemistry","volume":"506 1","pages":"202 - 210"},"PeriodicalIF":0.8,"publicationDate":"2023-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4603392","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Vinylation of Betulin with Calcium Carbide 桦木素与电石的乙烯化反应
IF 0.8 4区 化学
Doklady Chemistry Pub Date : 2023-02-15 DOI: 10.1134/S0012500822700124
Yu. V. Gyrdymova, K. S. Rodygin
{"title":"Vinylation of Betulin with Calcium Carbide","authors":"Yu. V. Gyrdymova,&nbsp;K. S. Rodygin","doi":"10.1134/S0012500822700124","DOIUrl":"10.1134/S0012500822700124","url":null,"abstract":"<p>A method for the synthesis of betulin vinyl ether using calcium carbide as a source of acetylene has been proposed. Optimal conditions for synthesis of betulin mono- and divinyl ether have been selected. It has been found that the addition of alkali metal fluorides in an excess of calcium carbide promotes the formation of a divinylated product. Two-dimensional NMR spectroscopy proves the formation of monovinyl ether at the primary alcohol group.</p>","PeriodicalId":530,"journal":{"name":"Doklady Chemistry","volume":"506 2","pages":"211 - 215"},"PeriodicalIF":0.8,"publicationDate":"2023-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4609307","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
New Method for the Preparation of 2,3-Disubstituted 2,3-Dihydrothiazolo[3,2-a]pyrimidines 制备2,3-二取代2,3-二氢噻唑[3,2-a]嘧啶的新方法
IF 0.8 4区 化学
Doklady Chemistry Pub Date : 2023-01-30 DOI: 10.1134/S0012500822700070
A. S. Agarkov, A. A. Kozhikhov, A. A. Nefedova, A. S. Ovsyannikov, D. R. Islamov, S. E. Solovieva,  I. S. Antipin
{"title":"New Method for the Preparation of 2,3-Disubstituted 2,3-Dihydrothiazolo[3,2-a]pyrimidines","authors":"A. S. Agarkov,&nbsp;A. A. Kozhikhov,&nbsp;A. A. Nefedova,&nbsp;A. S. Ovsyannikov,&nbsp;D. R. Islamov,&nbsp;S. E. Solovieva,&nbsp; I. S. Antipin","doi":"10.1134/S0012500822700070","DOIUrl":"10.1134/S0012500822700070","url":null,"abstract":"<p>A new approach to the synthesis of 2,3-disubstituted 2,3-dihydrothiazolo[3,2<i>-a</i>]pyrimidines under microwave activation conditions has been developed. The method consists in the nucleophilic addition of methanol to 2-arylmethylidene derivatives of thiazolo[3,2-<i>a</i>]pyrimidine followed by intramolecular rearrangement to form 3,5-diaryl-2,3-dihydrothiazolo[3,2-<i>a</i>]pyrimidine-2,6-dicarboxylates.</p>","PeriodicalId":530,"journal":{"name":"Doklady Chemistry","volume":"505 2","pages":"177 - 183"},"PeriodicalIF":0.8,"publicationDate":"2023-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"5148448","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Synthesis of Novel Derivatives of 5-Aryl/thienyl-[1,2,4]triazolo[4,3-c]quinazoline 5-芳基/噻吩基-[1,2,4]三唑啉[4,3-c]喹唑啉新衍生物的合成
IF 0.8 4区 化学
Doklady Chemistry Pub Date : 2023-01-30 DOI: 10.1134/S0012500822600298
E. V. Nosova, A. E. Kopotilova, M. D. Likhacheva, T. N. Moshkina, D. S. Kopchuk
{"title":"Synthesis of Novel Derivatives of 5-Aryl/thienyl-[1,2,4]triazolo[4,3-c]quinazoline","authors":"E. V. Nosova,&nbsp;A. E. Kopotilova,&nbsp;M. D. Likhacheva,&nbsp;T. N. Moshkina,&nbsp;D. S. Kopchuk","doi":"10.1134/S0012500822600298","DOIUrl":"10.1134/S0012500822600298","url":null,"abstract":"<p>[1,2,4]Triazolo[4,3-<i>c</i>]quinazolines bearing <i>p</i>-bromophenyl or 5-bromothiophen-2-yl moiety at position 5 have been synthesized by cyclocondensation of the corresponding 4-hydrazinoquinazolines with ortho esters in boiling ethanol or glacial acidic acid. The synthesized tricyclic derivatives represent valuable intermediates for design of fluorophores and biologically active compounds. The possibility of modifying 5-(4-bromophenyl) derivatives by cross-coupling reaction has been demonstrated.</p>","PeriodicalId":530,"journal":{"name":"Doklady Chemistry","volume":"505 2","pages":"164 - 167"},"PeriodicalIF":0.8,"publicationDate":"2023-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"5145274","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Synthesis of Polyfunctional Oligoetherdiols Based on Allyl Glycidyl Ether 烯丙基缩水甘油醚合成多官能团低聚醚二醇
IF 0.8 4区 化学
Doklady Chemistry Pub Date : 2023-01-30 DOI: 10.1134/S0012500822700082
T. V. Grinevich, M. L. Pridatchenko, D. B. Vinogradov, P. V. Bulatov,  A. A. Berlin
{"title":"Synthesis of Polyfunctional Oligoetherdiols Based on Allyl Glycidyl Ether","authors":"T. V. Grinevich,&nbsp;M. L. Pridatchenko,&nbsp;D. B. Vinogradov,&nbsp;P. V. Bulatov,&nbsp; A. A. Berlin","doi":"10.1134/S0012500822700082","DOIUrl":"10.1134/S0012500822700082","url":null,"abstract":"<p>The bromination reaction of oligoetherdiol derived from allyl glycidyl ether by two procedures has been studied. It has been shown that one procedure provides monohydroxy conpounds and compounds containing no OH groups along with completely brominated oligoetherdiol. Their formation has been supposed to proceed via cyclodehydrobromination reaction due to elimination of one or two hydrogen bromide molecules from oligoetherdiol to form dioxane and dioxepane cyclic fragments. Conditions for complete bromination of oligodiol with retention of OH group functionality have been determined.</p>","PeriodicalId":530,"journal":{"name":"Doklady Chemistry","volume":"505 1","pages":"146 - 150"},"PeriodicalIF":0.8,"publicationDate":"2023-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"5152806","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A New Method to Prepare Ni/La2O3 Nanocomposites—Efficient Catalysts for the Partial Oxidation of Methane into Syngas 制备Ni/La2O3纳米复合材料的新方法——甲烷部分氧化制合成气的高效催化剂
IF 0.8 4区 化学
Doklady Chemistry Pub Date : 2023-01-30 DOI: 10.1134/S0012500822600328
A. G. Dedov, A. S. Loktev, A. V. Gavrikov, M. A. Bykov, I. E. Mukhin, A. B. Ilyukhin
{"title":"A New Method to Prepare Ni/La2O3 Nanocomposites—Efficient Catalysts for the Partial Oxidation of Methane into Syngas","authors":"A. G. Dedov,&nbsp;A. S. Loktev,&nbsp;A. V. Gavrikov,&nbsp;M. A. Bykov,&nbsp;I. E. Mukhin,&nbsp;A. B. Ilyukhin","doi":"10.1134/S0012500822600328","DOIUrl":"10.1134/S0012500822600328","url":null,"abstract":"<p>A new method was developed to prepare nanoscale Ni/La<sub>2</sub>O<sub>3</sub> composites—efficient catalysts of the partial oxidation of methane (POM) into syngas. The catalysts are formed in situ during POM from LaNiO<sub>3</sub> obtained by the thermal decomposition of heterometallic La–Ni nitrate complexes. The catalysts ensure an almost 100% yield of syngas and are resistant to carbon deposition.</p>","PeriodicalId":530,"journal":{"name":"Doklady Chemistry","volume":"505 1","pages":"151 - 158"},"PeriodicalIF":0.8,"publicationDate":"2023-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"5149652","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Antiradical Activity of Polycyclic Compounds with Indole and Isoindole Moieties 吲哚和异吲哚多环化合物的抗自由基活性
IF 0.8 4区 化学
Doklady Chemistry Pub Date : 2023-01-30 DOI: 10.1134/S0012500822600316
V. P. Osipova, M. A. Polovinkina, A. D. Kolumbet, E. N. Kutlalieva, A. V. Velikorodov, N. T. Berberova
{"title":"Antiradical Activity of Polycyclic Compounds with Indole and Isoindole Moieties","authors":"V. P. Osipova,&nbsp;M. A. Polovinkina,&nbsp;A. D. Kolumbet,&nbsp;E. N. Kutlalieva,&nbsp;A. V. Velikorodov,&nbsp;N. T. Berberova","doi":"10.1134/S0012500822600316","DOIUrl":"10.1134/S0012500822600316","url":null,"abstract":"<p>The antiradical activity of polycyclic compounds with indole and isoindole moieties was evaluated in vitro using a number of assays. All tested compounds, except for 3,5-di(<i>tert</i>-butyl)-4-hydroxybenzenecarbaldehyde <i>N</i>-(2-oxo-1,2-dihydro-3<i>H</i>-indole-3-ylidene)hydrazone, demonstrated much lower activity towards DPPH, ABTS<sup>•+</sup>, and NO<sup>•</sup> radicals than the well-known antioxidant ionol. All compounds showed a high radical-scavenging capacity relative to the superoxide radical anion generated in the enzymatic (NBT assay) and non-enzymatic (epinephrine autoxidation) systems. The high antiradical activity of 3,5-di(<i>tert</i>-butyl)-4-hydroxybenzenecarbaldehyde <i>N</i>-(2-oxo-1,2-dihydro-3<i>H</i>-indol-3-ylidene) hydrazone is attributable to the presence of 2,6-di-<i>tert</i>-butylphenol, indoline, and azine moieties, which promote the formation of a stable intermediate.</p>","PeriodicalId":530,"journal":{"name":"Doklady Chemistry","volume":"505 2","pages":"159 - 163"},"PeriodicalIF":0.8,"publicationDate":"2023-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"5153608","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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