发布求助
文献互助 智能选刊 最新文献

Doklady Chemistry最新文献

筛选
英文 中文
Unexpected Effect of N-Heterocyclic Carbene on the Catalytic Activity of Palladium Complex in the Cross-Coupling Reaction of K[C6F5BF3] with Aryl Chlorides 在 K[C6F5BF3] 与芳基氯化物的交叉偶联反应中，N-杂环碳烯对钯配合物催化活性的意外影响
IF 0.8 4区 化学
Doklady Chemistry Pub Date : 2024-01-20 DOI: 10.1134/S0012500823600979
N. Yu. Adonin, A. Yu. Shabalin, S. A. Prikhod’ko, V. V. Bardin
{"title":"Unexpected Effect of N-Heterocyclic Carbene on the Catalytic Activity of Palladium Complex in the Cross-Coupling Reaction of K[C6F5BF3] with Aryl Chlorides","authors":"N. Yu. Adonin,&nbsp;A. Yu. Shabalin,&nbsp;S. A. Prikhod’ko,&nbsp;V. V. Bardin","doi":"10.1134/S0012500823600979","DOIUrl":"10.1134/S0012500823600979","url":null,"abstract":"<p>In the palladium-catalyzed cross-coupling of potassium pentafluorophenyltrifluoroborate with aryl chlorides in the presence of the precursor of SIMes carbene, the yields of pentafluorobiphenyls decrease, whereas the yield of 2,3,4,5,6-pentafluoro-4'-methylbiphenyl from 4-bromotoluene under the same conditions increases. An explanation for this phenomenon and for the intensification of the side hydrodeboration reaction of the initial borate has been proposed.</p>","PeriodicalId":530,"journal":{"name":"Doklady Chemistry","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2024-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139516092","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
Activating Effect of AlCl3 in Homocoupling Reaction of Acetylene Derivatives under the Action of Mg–Cp2ZrCl2 Reagent Systems 在 Mg-Cp2ZrCl2 试剂体系作用下乙炔衍生物均偶联反应中 AlCl3 的活化效应
IF 0.8 4区 化学
Doklady Chemistry Pub Date : 2023-12-25 DOI: 10.1134/S0012500823600724
I. R. Ramazanov, F. T. Sadykova, T. P. Zosim, K. S. Frolova,  U. M. Dzhemilev
{"title":"Activating Effect of AlCl3 in Homocoupling Reaction of Acetylene Derivatives under the Action of Mg–Cp2ZrCl2 Reagent Systems","authors":"I. R. Ramazanov,&nbsp;F. T. Sadykova,&nbsp;T. P. Zosim,&nbsp;K. S. Frolova,&nbsp; U. M. Dzhemilev","doi":"10.1134/S0012500823600724","DOIUrl":"10.1134/S0012500823600724","url":null,"abstract":"<p>The activating effect of AlCl<sub>3</sub> in the amount of 10 mol % in the homocoupling of alkyl-, phenyl-, and silyl-substituted acetylenes with the Mg–Cp<sub>2</sub>ZrCl<sub>2</sub> reagent system was found for the first time. The unique nature of this activation is indicated by the fact that in the presence of 10 mol % of Lewis acids BF<sub>3</sub>⋅Et<sub>2</sub>O, Me<sub>3</sub>SiCl, InCl<sub>3</sub>, and SnCl<sub>4</sub>, the reaction with 5-decyne does not occur even after 5 h, while in the presence of AlCl<sub>3</sub>, homocoupling products are selectively formed in high yields within 10 min at room temperature.</p>","PeriodicalId":530,"journal":{"name":"Doklady Chemistry","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2023-12-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139056962","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
Y-Shaped Fluorophores Based on N(2)-Aryl-1,2,3-triazoles: Synthesis and Study of Photophysical and Chemosensor Properties for the Detection of Nitroaromatic Compounds 基于 N(2)-芳基-1,2,3-三唑的 Y 型荧光团：用于检测硝基芳香族化合物的光物理和化学传感器特性的合成与研究
IF 0.8 4区 化学
Doklady Chemistry Pub Date : 2023-12-25 DOI: 10.1134/S0012500823600682
I. A. Lavrinchenko, T. D. Moseev, M. V. Varaksin, Yu. A. Seleznev, L. K. Sadieva, G. V. Zyryanov, A. N. Tsmokaluk,  V. N. Charushin,  O. N. Chupakhin
{"title":"Y-Shaped Fluorophores Based on N(2)-Aryl-1,2,3-triazoles: Synthesis and Study of Photophysical and Chemosensor Properties for the Detection of Nitroaromatic Compounds","authors":"I. A. Lavrinchenko,&nbsp;T. D. Moseev,&nbsp;M. V. Varaksin,&nbsp;Yu. A. Seleznev,&nbsp;L. K. Sadieva,&nbsp;G. V. Zyryanov,&nbsp;A. N. Tsmokaluk,&nbsp; V. N. Charushin,&nbsp; O. N. Chupakhin","doi":"10.1134/S0012500823600682","DOIUrl":"10.1134/S0012500823600682","url":null,"abstract":"<p>A five-stage method for the synthesis of Y-shaped push–pull fluorophores based on 2-(4'-methoxyphenyl)-1,2,3-triazole was proposed. The resulting molecules exhibited emission in the range from 350 to 450 nm with high quantum yields (QY) of 90–99% in solvents of various polarity. The products proved to be applicable as chemosensors for both aromatic and aliphatic nitro analytes in concentrations down to 300 ppb.</p>","PeriodicalId":530,"journal":{"name":"Doklady Chemistry","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2023-12-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139057109","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
Application of Soy Lecithin as a Promoter of Methane Hydrate Formation 应用大豆卵磷脂作为甲烷水合物形成的促进剂
IF 0.8 4区 化学
Doklady Chemistry Pub Date : 2023-12-25 DOI: 10.1134/S001250082360075X
V. P. Mel’nikov, N. S. Molokitina, A. O. Drachuk, K. A. Pletneva, A. A. Kibkalo, B. V. Grigor’ev, G. Pandey
{"title":"Application of Soy Lecithin as a Promoter of Methane Hydrate Formation","authors":"V. P. Mel’nikov,&nbsp;N. S. Molokitina,&nbsp;A. O. Drachuk,&nbsp;K. A. Pletneva,&nbsp;A. A. Kibkalo,&nbsp;B. V. Grigor’ev,&nbsp;G. Pandey","doi":"10.1134/S001250082360075X","DOIUrl":"10.1134/S001250082360075X","url":null,"abstract":"<p>The course towards active development of the Arctic zone of the Russian Federation by fuel-and-energy companies involves the development of new methods and approaches to the storage and transportation of natural gas to reduce the negative impact on the ecosystems of cold regions while maintaining the economic feasibility of their use. This work proposes a method for optimizing the technology for transporting and storing natural gas in the form of gas hydrates using soy lecithin as a promoting additive. Experimental methods showed that the addition of soy lecithin to a concentration of 0.5 wt % is on a par with the most efficient promoter of hydrate formation—the surfactant sodium dodecyl sulfate at a concentration of 0.1 wt %. However, a comparison of environmental characteristics demonstrates a clear advantage of soy lecithin. In addition, it was demonstrated that the synthesis of methane hydrate from ground frozen solutions of soy lecithin is at least three times faster than that from liquid solutions.</p>","PeriodicalId":530,"journal":{"name":"Doklady Chemistry","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2023-12-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139057237","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
Methylation and Amination of 4H-[1,2,3]Triazolo[4,5-c][1,2,5]oxadiazole Salts 4H-[1,2,3]三唑并[4,5-c][1,2,5]恶二唑盐的甲基化和胺化反应
IF 0.8 4区 化学
Doklady Chemistry Pub Date : 2023-12-25 DOI: 10.1134/S0012500823600669
S. P. Balabanova, A. A. Voronin, A. M. Churakov, M. S. Klenov,  V. A. Tartakovsky
{"title":"Methylation and Amination of 4H-[1,2,3]Triazolo[4,5-c][1,2,5]oxadiazole Salts","authors":"S. P. Balabanova,&nbsp;A. A. Voronin,&nbsp;A. M. Churakov,&nbsp;M. S. Klenov,&nbsp; V. A. Tartakovsky","doi":"10.1134/S0012500823600669","DOIUrl":"10.1134/S0012500823600669","url":null,"abstract":"<p>Methylation and amination reactions of 4<i>Н</i>-[1,2,3]triazolo[4,5-<i>c</i>][1,2,5]oxadiazole salts (K<sup>+</sup>, Ag<sup>+</sup>, Et<sub>3</sub>NH<sup>+</sup>, DBUH<sup>+</sup>) have been studied for the first time. It has been shown that the reaction of these salts with MeI results in two methylation products: K and Et<sub>3</sub>N salts produce 4- and 5-isomers in equal amounts, while Ag and DBU salts form mainly 4-isomer. It has been found that the main amination product of K and DBU salts of 4<i>Н</i>-[1,2,3]triazolo[4,5-<i>c</i>][1,2,5]oxadiazole with <i>O</i>-(<i>p</i>-tolylsulfonyl)hydroxylamine is 4-azido-3-amino-1,2,5-oxadiazole. A mechanism of its formation via rearrangement of 5-amino-[1,2,3]triazolo[4,5-<i>c</i>][1,2,5]oxadiazole has been proposed.</p>","PeriodicalId":530,"journal":{"name":"Doklady Chemistry","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2023-12-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139057281","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 5,5-Disubstituted N-Methyl-1,3-oxazinanes Containing Monoterpene Fragments 含单萜烯片段的 5,5-二取代 N-甲基-1,3-恶嗪酮的合成
IF 0.8 4区 化学
Doklady Chemistry Pub Date : 2023-12-25 DOI: 10.1134/S001250082360058X
I. V. Nechepurenko, K. P. Volcho,  N. F. Salakhutdinov
{"title":"Synthesis of 5,5-Disubstituted N-Methyl-1,3-oxazinanes Containing Monoterpene Fragments","authors":"I. V. Nechepurenko,&nbsp;K. P. Volcho,&nbsp; N. F. Salakhutdinov","doi":"10.1134/S001250082360058X","DOIUrl":"10.1134/S001250082360058X","url":null,"abstract":"<p>A new method has been developed for the synthesis of 5,5-disubstituted <i>N</i>-methyl-1,3-oxazinanes as a mixture of diastereomers at the 5-position containing monoterpene and branched alkyl substituents in the 5-position. 1,3-Oxazinanes were obtained for the first time by reacting 2,2-substituted 3-aminopropan-1-ols with formaldehyde and sodium borohydride in one stage.</p>","PeriodicalId":530,"journal":{"name":"Doklady Chemistry","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2023-12-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139057146","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
Stability of Pd/C Catalysts in Solvents for Organic Synthesis Pd/C 催化剂在有机合成溶剂中的稳定性
IF 0.8 4区 化学
Doklady Chemistry Pub Date : 2023-12-25 DOI: 10.1134/S0012500823600657
A. S. Galushko, V. V. Ilyushenkova, Yu. V. Burykina, R. R. Shaidullin, E. O. Pentsak
{"title":"Stability of Pd/C Catalysts in Solvents for Organic Synthesis","authors":"A. S. Galushko,&nbsp;V. V. Ilyushenkova,&nbsp;Yu. V. Burykina,&nbsp;R. R. Shaidullin,&nbsp;E. O. Pentsak","doi":"10.1134/S0012500823600657","DOIUrl":"10.1134/S0012500823600657","url":null,"abstract":"<p>The effect of carbon supports and preparation methods of Pd/C catalysts on leaching of palladium-containing species to the solution upon interaction of a catalyst with a solvent was considered. The leaching of palladium from the support surface into pure solvents was studied by high resolution mass spectrometry. It has been shown that the type of leached palladium species formed in the solution depends not only on the solvent, but also on the method of catalyst deposition on the support and the support nature. It has been found that the use of phosphorus-doped carbon (PC) as a support also results in palladium leaching into solution. In addition, the activity of the catalysts supported on graphite and PC decreased to the same degree both in the Suzuki–Miyaura and Mizoroki–Heck reactions.</p>","PeriodicalId":530,"journal":{"name":"Doklady Chemistry","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2023-12-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139057405","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
Current Trends in the Synthesis of Inorganic and Organoelement Phosphorus- and Sulfur-Containing Polymers. A Review 当前无机和有机元素含磷和含硫聚合物的合成趋势。综述
IF 0.8 4区 化学
Doklady Chemistry Pub Date : 2023-12-25 DOI: 10.1134/S0012500823600670
N. P. Tarasova, E. G. Krivoborodov, Ya. O. Mezhuev
{"title":"Current Trends in the Synthesis of Inorganic and Organoelement Phosphorus- and Sulfur-Containing Polymers. A Review","authors":"N. P. Tarasova,&nbsp;E. G. Krivoborodov,&nbsp;Ya. O. Mezhuev","doi":"10.1134/S0012500823600670","DOIUrl":"10.1134/S0012500823600670","url":null,"abstract":"<p>An analysis of literature data on the set of reactions for the production of macromolecules with a high content of phosphorus and sulfur has been carried out, and basic approaches that allow the introduction of these elements into the composition of polymers and polymeric materials have been considered in compliance with the fundamental principles of green chemistry. Methods for synthesis of functional polymers under mild conditions that require minimal energy input from external sources, which can become new growth points for green industrial technologies, are considered. Particular attention focuses on the synthesis of polyphosphazenes and polyphosphoesters for biomedical purposes, as well as on the inverse vulcanization reaction to give polymers used in sorption wastewater treatment, the creation of current sources, and IR optics.</p>","PeriodicalId":530,"journal":{"name":"Doklady Chemistry","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2023-12-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1134/S0012500823600670.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139056972","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
New Polyfunctional Lubricating Oil Additive Based on a Sulfur-Containing Derivative of 2,6-Dimethylphenol 基于 2,6-二甲基苯酚含硫衍生物的新型多官能团润滑油添加剂
IF 0.8 4区 化学
Doklady Chemistry Pub Date : 2023-12-25 DOI: 10.1134/S0012500823600761
E. G. Bordubanova, E. Yu. Oganesova, A. S. Lyadov, O. P. Parenago
{"title":"New Polyfunctional Lubricating Oil Additive Based on a Sulfur-Containing Derivative of 2,6-Dimethylphenol","authors":"E. G. Bordubanova,&nbsp;E. Yu. Oganesova,&nbsp;A. S. Lyadov,&nbsp;O. P. Parenago","doi":"10.1134/S0012500823600761","DOIUrl":"10.1134/S0012500823600761","url":null,"abstract":"<p>New dialkyldithio derivatives of 2,6-dimethylphenol have been synthesized and characterized. The multifunctional properties have been studied for the first time for these compounds as additives to lubricating oils in friction and wear processes under boundary friction conditions, as inhibitors of high-temperature oxidation of hydrocarbons, and as protectors of metal surfaces. It was determined that even a 0.5 wt % concentration of the synthesized additives in lubricating oils contain more than doubles anti-wear properties. It was shown that the additives exhibit a complex antioxidant effect and high efficiency at all stages of the oxidation process, and even at ultralow concentrations (0.005 wt %), their ability to resist oxidation exceeds widely used analogues. The new additives are of significant interest to modern lubricant science and can be used in motor oil formulations and other lubricants.</p>","PeriodicalId":530,"journal":{"name":"Doklady Chemistry","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2023-12-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139057108","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
Controlled Radical Polymerization of Lauryl Methacrylate in the Synthetic Polyalphaolefin Base Oil 甲基丙烯酸月桂酯在合成聚α烯烃基础油中的受控辐射聚合反应
IF 0.8 4区 化学
Doklady Chemistry Pub Date : 2023-12-25 DOI: 10.1134/S0012500823600712
E. V. Chernikova, M. S. Pavlova, A. V. Plutalova, E. A. Litmanovich,  A. L. Maksimov
{"title":"Controlled Radical Polymerization of Lauryl Methacrylate in the Synthetic Polyalphaolefin Base Oil","authors":"E. V. Chernikova,&nbsp;M. S. Pavlova,&nbsp;A. V. Plutalova,&nbsp;E. A. Litmanovich,&nbsp; A. L. Maksimov","doi":"10.1134/S0012500823600712","DOIUrl":"10.1134/S0012500823600712","url":null,"abstract":"<p>Controlled radical polymerization of lauryl methacrylate in polyalphaolefin base oil has been performed for the first time in the presence of 2-cyano-2-propyl dodecyl trithiocarbonate. It has been shown that polymerization proceeds to high monomer conversions and leads to the formation of a polymer with a narrow molecular weight distribution. At the same time, the reaction mixtures retain their transparency after polymerization is completed. The synthesized polymers have a thickening ability, which naturally increases with an increase in their number-average molecular weight.</p>","PeriodicalId":530,"journal":{"name":"Doklady Chemistry","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2023-12-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139057186","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
首页 上一页 下一页 尾页
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整，为了账户安全，请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们：info@booksci.cn Book学术提供免费学术资源搜索服务，方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号：481959085
Book学术官方微信