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Features of the Synthesis and Crystallization of Mg3BPO7 Mg3BPO7的合成与结晶特点
IF 0.8 4区 化学
Doklady Chemistry Pub Date : 2023-02-15 DOI: 10.1134/S0012500822700136
M. N. Smirnova, M. A. Kop’eva, G. D. Nipan, G. E. Nikiforova
{"title":"Features of the Synthesis and Crystallization of Mg3BPO7","authors":"M. N. Smirnova,&nbsp;M. A. Kop’eva,&nbsp;G. D. Nipan,&nbsp;G. E. Nikiforova","doi":"10.1134/S0012500822700136","DOIUrl":"10.1134/S0012500822700136","url":null,"abstract":"<p>The crystalline phase of Mg<sub>3</sub>BPO<sub>7</sub> was obtained by gel combustion method and solid-phase synthesis with optimization of annealing temperatures. The effect of precursors and synthesis conditions on the formation of Mg<sub>3</sub>BPO<sub>7</sub> was analyzed by X-ray powder diffraction and IR spectroscopy. It was shown that the formation of a mixture of kotoite Mg<sub>3</sub>B<sub>2</sub>O<sub>6</sub> and farringtonite Mg<sub>3</sub>P<sub>2</sub>O<sub>8</sub> prevents the formation of Mg<sub>3</sub>BPO<sub>7</sub>, whereas a significant excess of periclase MgO promotes the production of Mg<sub>3</sub>BPO<sub>7</sub>.</p>","PeriodicalId":530,"journal":{"name":"Doklady Chemistry","volume":"506 2","pages":"223 - 227"},"PeriodicalIF":0.8,"publicationDate":"2023-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4603399","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
Selective Hydrodeoxygenation of Glycerol to 1,2-Propanediol with the Pt/CeO2–ZrO2 Catalyst Pt/ CeO2-ZrO2催化剂下甘油选择性加氢脱氧制1,2-丙二醇
IF 0.8 4区 化学
Doklady Chemistry Pub Date : 2023-02-15 DOI: 10.1134/S0012500822600158
E. A. Redina, K. V. Vikanova, O. P. Tkachenko, G. I. Kapustin, L. M. Kustov
{"title":"Selective Hydrodeoxygenation of Glycerol to 1,2-Propanediol with the Pt/CeO2–ZrO2 Catalyst","authors":"E. A. Redina,&nbsp;K. V. Vikanova,&nbsp;O. P. Tkachenko,&nbsp;G. I. Kapustin,&nbsp;L. M. Kustov","doi":"10.1134/S0012500822600158","DOIUrl":"10.1134/S0012500822600158","url":null,"abstract":"<p>An active and selective catalyst 1%Pt/CeO<sub>2</sub>–ZrO<sub>2</sub> for glycerol hydrodeoxygenation to 1,2-propanediol was synthesized. The reaction was carried out in water under relatively mild conditions: a temperature of 170°C and a hydrogen pressure of 10 atm for 6 h. The glycerol conversion reached 82% with a 74% selectivity to 1,2-propanediol. The high activity and selectivity of the catalyst are due to the high degree of dispersion of supported platinum nanoparticles with a size of less than 2 nm, the optimal Ce : Zr ratio in a mixed oxide support, high specific surface area, and the presence of weak Brønsted acid sites. The presence of zirconium in the mixed oxide support not only gives rise to additional defects in the cerium oxide structure, but also stabilizes the deposited platinum nanoparticles.</p>","PeriodicalId":530,"journal":{"name":"Doklady Chemistry","volume":"507 2","pages":"261 - 269"},"PeriodicalIF":0.8,"publicationDate":"2023-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4607268","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
Adamantyl-Substituted Triplet Diradical: Synthesis, Structure, Redox and Magnetic Properties 金刚烷基取代三重态双自由基的合成、结构、氧化还原及磁性能
IF 0.8 4区 化学
Doklady Chemistry Pub Date : 2023-02-15 DOI: 10.1134/S0012500822700148
M. V. Mikhailova, E. M. Dudko, D. I. Nasyrova, A. Ya. Akyeva, M. A. Syroeshkin, A. S. Bogomyakov, N. A. Artyukhova, M. V. Fedin, D. E. Gorbunov, N. P. Gritsan, E. V. Tretyakov,  V. I. Ovcharenko,  M. P. Egorov
{"title":"Adamantyl-Substituted Triplet Diradical: Synthesis, Structure, Redox and Magnetic Properties","authors":"M. V. Mikhailova,&nbsp;E. M. Dudko,&nbsp;D. I. Nasyrova,&nbsp;A. Ya. Akyeva,&nbsp;M. A. Syroeshkin,&nbsp;A. S. Bogomyakov,&nbsp;N. A. Artyukhova,&nbsp;M. V. Fedin,&nbsp;D. E. Gorbunov,&nbsp;N. P. Gritsan,&nbsp;E. V. Tretyakov,&nbsp; V. I. Ovcharenko,&nbsp; M. P. Egorov","doi":"10.1134/S0012500822700148","DOIUrl":"10.1134/S0012500822700148","url":null,"abstract":"<p>A stable diradical 2-{<i>N</i>-[(3s,5s,7s)-adamantyl-1]-<i>N</i>-oxylamino}-4,4,5,5-tetramethyl-4,5-dihydro-1<i>H</i>-imidazole-3-oxide-1-oxyl—a heteroatomic analogue of trimethylenemethane—has been synthesized by reacting lithiated 4,4,5,5-tetramethyl-4,5-dihydro-1<i>H</i>-imidazole-3-oxide-1-oxyl with 1-nitroso-adamantane, followed by oxidation of the intermediate hydroxylamine. According to X-ray diffraction data, the dihedral angle between the planes of paramagnetic moieties in the paramagnet is close to 60°. Magnetochemical measurements have shown that the energy gap between the triplet and singlet states (2<i>J</i>/<i>k</i><sub>B</sub>; <i>H</i> = –2<i>JS</i><sub>1/2</sub><i>S</i><sub>1/2</sub>) in the diradical is 880 K. The EPR spectrum of the diradical was simulated using the parameters: <i>S</i> = 1, <i>g</i><sub><i>xx</i></sub> = 2.007, <i>g</i><sub><i>yy</i></sub> = 2.005, <i>g</i><sub><i>zz</i></sub> = 2.006, <i>D</i> = 825 MHz, <i>E</i> = 60 MHz. According to the data of cyclic voltammetry in the anodic region, the diradical undergoes electrochemical oxidation at potentials of 0.79, 1.63, 1.89, and 2.25 V, the first process being chemically and electrochemically reversible. In the cathodic region, the diradical is reduced quasi-reversibly at –1.18 and irreversibly at –2.59 V.</p>","PeriodicalId":530,"journal":{"name":"Doklady Chemistry","volume":"507 2","pages":"270 - 280"},"PeriodicalIF":0.8,"publicationDate":"2023-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4608232","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
Phosphorus-Centered Radicals: Synthesis, Properties, and Applications. A Review 磷中心自由基:合成、性质和应用。回顾
IF 0.8 4区 化学
Doklady Chemistry Pub Date : 2023-02-15 DOI: 10.1134/S0012500822600353
Yu. H. Budnikova
{"title":"Phosphorus-Centered Radicals: Synthesis, Properties, and Applications. A Review","authors":"Yu. H. Budnikova","doi":"10.1134/S0012500822600353","DOIUrl":"10.1134/S0012500822600353","url":null,"abstract":"<p>Phosphorus-containing compounds have a huge synthetic potential because of their wide application in pharmaceuticals, biology, agrochemistry, organic synthesis, and materials science. The search for new selective reactions for their preparation requires a deeper understanding of the properties and reactivity of key intermediates, which include phosphorus-centered radicals. Of particular interest are the ways to stabilize such radicals, which have unusual physical properties. This review analyzes and summarizes basic achievements and trends in both the generation of highly reactive phosphorus radicals and their involvement in practically significant synthesis reactions, primarily the formation of phosphorus–carbon bonds, and the pathways for the synthesis of stable radicals, their physicochemical properties, and magnetic resonance parameters. Despite the long historical development of research, important achievements in this area have been made over the past decade.</p>","PeriodicalId":530,"journal":{"name":"Doklady Chemistry","volume":"507 1","pages":"229 - 259"},"PeriodicalIF":0.8,"publicationDate":"2023-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4608224","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
Concurrent N- and C-Functionalization of Acridine with Ethyl Aryl-2-oxobut-3-ynoates in the Presence of Water: Synthesis of N-Alkenylacridin-9-ones 在水存在下吖啶与乙基芳基-2-氧丁-3-乙酸酯同时N-和c -功能化:N-烯基吖啶酮-9-酮的合成
IF 0.8 4区 化学
Doklady Chemistry Pub Date : 2023-02-15 DOI: 10.1134/S0012500822600365
L. P. Nikitina, K. V. Belyaeva, V. S. Gen’, A. V. Afonin,  B. A. Trofimov
{"title":"Concurrent N- and C-Functionalization of Acridine with Ethyl Aryl-2-oxobut-3-ynoates in the Presence of Water: Synthesis of N-Alkenylacridin-9-ones","authors":"L. P. Nikitina,&nbsp;K. V. Belyaeva,&nbsp;V. S. Gen’,&nbsp;A. V. Afonin,&nbsp; B. A. Trofimov","doi":"10.1134/S0012500822600365","DOIUrl":"10.1134/S0012500822600365","url":null,"abstract":"<p>Acridine has been found to undergo readily concurrent N(1)- and С(9)-functionalization under the action of ethyl aryl-2-oxobut-3-ynoates and water to form pharmacologically promising previously unknown <i>N</i>-alkenylacridones in 80–84% yields.</p>","PeriodicalId":530,"journal":{"name":"Doklady Chemistry","volume":"506 1","pages":"185 - 189"},"PeriodicalIF":0.8,"publicationDate":"2023-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4604521","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
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
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