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Complexes of CaII with the tris[(2-dimethylaminomethyl)phenyl]methoxide ligand CaII与三[（2-二甲氨基甲基）苯基]甲氧基配合物
IF 1.7 4区 化学
Russian Chemical Bulletin Pub Date : 2024-12-06 DOI: 10.1007/s11172-024-4401-9
A. N. Selikhov, Yu. V. Nelyubina, A. A. Trifonov
{"title":"Complexes of CaII with the tris[(2-dimethylaminomethyl)phenyl]methoxide ligand","authors":"A. N. Selikhov,&nbsp;Yu. V. Nelyubina,&nbsp;A. A. Trifonov","doi":"10.1007/s11172-024-4401-9","DOIUrl":"10.1007/s11172-024-4401-9","url":null,"abstract":"<div><p>The reaction of equimolar amounts of tris[(2-dimethylaminomethyl)phenyl]methanol (2-Me<sub>2</sub>NCH<sub>2</sub>C<sub>6</sub>H<sub>4</sub>)<sub>3</sub>COH (<b>1</b>)) with [Ca{N(SiMe<sub>3</sub>)<sub>2</sub>}<sub>2</sub>(THF)<sub>2</sub>] in toluene at 23 °C gave the mixed-ligand calcium alkoxyamide complex [Ca{(2-Me<sub>2</sub>NCH<sub>2</sub>C<sub>6</sub>H<sub>4</sub>)<sub>3</sub>CO}{N(SiMe<sub>3</sub>)<sub>2</sub>}-(THF)] (<b>2</b>). When attempting to synthesize the corresponding alkoxy hydride complex by the reaction of <b>2</b> with PhSiH<sub>3</sub>, the bis(alkoxide) complex [κ-O,N,N-(2-Me<sub>2</sub>NCH<sub>2</sub>-C<sub>6</sub>H<sub>4</sub>)<sub>3</sub>CO}<sub>2</sub>Ca] (<b>3</b>) and CaH<sub>2</sub> were isolated from the reaction mixture as a result of symmetrization of the intermediate calcium alkoxy hydride. The structures of complexes <b>2</b> and <b>3</b> were determined by X-ray diffraction. Complex <b>3</b> has a nearly linear structure, only three NMe<sub>2</sub> moieties of both ligands being involved in the coordination to the metal ion.</p></div>","PeriodicalId":756,"journal":{"name":"Russian Chemical Bulletin","volume":"73 10","pages":"2844 - 2851"},"PeriodicalIF":1.7,"publicationDate":"2024-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142778429","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
Hydrocarbon chains of biomembrane phospholipids: structural realizations of noncrystallographic symmetrical constructions 生物膜磷脂的碳氢化合物链：非晶体对称结构的结构实现
IF 1.7 4区 化学
Russian Chemical Bulletin Pub Date : 2024-12-06 DOI: 10.1007/s11172-024-4425-1
A. L. Talis
{"title":"Hydrocarbon chains of biomembrane phospholipids: structural realizations of noncrystallographic symmetrical constructions","authors":"A. L. Talis","doi":"10.1007/s11172-024-4425-1","DOIUrl":"10.1007/s11172-024-4425-1","url":null,"abstract":"<div><p>The characteristic features of the structures of the most common hydrocarbon (fatty acid) chains of phospholipid molecules that form the basis for biological membranes are considered. It has been established that the most symmetrical association of tetrahedrally coordinated chains corresponding to the hydrocarbon chains of phospholipids was found to be the four-dimensional 240-vertex diamond-like substructure of a three-dimensional sphere: the {240} polytope. The building blocks of the phospholipid hydrocarbon chain are defined as 14- and 11-vertex fragments of the tetrahedrally coordinated linear substructure of the {240} polytope and are also defined by structural realizations of a special combinatorial construction on seven symbols. It is shown that the symmetry-based requirement for the assembly only from an integer number of such building blocks makes it possible to explain the realization of a very limited number of hydrocarbon chains of biomembrane phospholipids from a huge number of combinatorially possible variants of similar chains.</p></div>","PeriodicalId":756,"journal":{"name":"Russian Chemical Bulletin","volume":"73 10","pages":"3081 - 3089"},"PeriodicalIF":1.7,"publicationDate":"2024-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142778135","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
Autocatalytic synthesis of silicones 有机硅的自催化合成
IF 1.7 4区 化学
Russian Chemical Bulletin Pub Date : 2024-12-06 DOI: 10.1007/s11172-024-4422-4
P. V. Ivanov, N. G. Mazhorova, V. V. Besfamilnyi
{"title":"Autocatalytic synthesis of silicones","authors":"P. V. Ivanov,&nbsp;N. G. Mazhorova,&nbsp;V. V. Besfamilnyi","doi":"10.1007/s11172-024-4422-4","DOIUrl":"10.1007/s11172-024-4422-4","url":null,"abstract":"<div><p>According to the data provided in the literature and to the results of experiments and calculations using the NRTL and UNIFAC equations, hydrolytic polycondensation of silicone monomers R<sub><i>n</i></sub>SiX<sub>4−<i>n</i></sub> (X = Cl; —OR′, —OCOR) is an autocatalytic process that is accelerated by the products of the process (silanols, alcohols, acids) owing to their effect on the increase in solubility and, as a consequence, on the increase in the concentration of the reagent (water) in the reaction zone. This is also facilitated by an increase in both the intensity of mixing of reagents and temperature. Modeling of changing phase quasi-equilibria during the hydrolysis of silicone monomers showed that in the kinetic regime, the supply of water from the aqueous phase exceeds its consumption in the reaction, which leads to an increase in the rate of hydrolysis. The autocatalytic nature of the hydrolysis and condensation of alkoxy- and acetoxysilanes offers prospects for the catalyst- and solvent-free synthesis of polyorganosiloxanes.</p></div>","PeriodicalId":756,"journal":{"name":"Russian Chemical Bulletin","volume":"73 10","pages":"3055 - 3064"},"PeriodicalIF":1.7,"publicationDate":"2024-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142778490","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 first example of a ring closing metathesis in a series of anthracycline antibiotics 这是一系列蒽环类抗生素中环闭合复分解的第一个例子
IF 1.7 4区 化学
Russian Chemical Bulletin Pub Date : 2024-12-06 DOI: 10.1007/s11172-024-4430-4
A. A. Moiseeva, O. I. Artyushin
{"title":"The first example of a ring closing metathesis in a series of anthracycline antibiotics","authors":"A. A. Moiseeva,&nbsp;O. I. Artyushin","doi":"10.1007/s11172-024-4430-4","DOIUrl":"10.1007/s11172-024-4430-4","url":null,"abstract":"<div><p>A ring-closing metathesis giving 3-pyrroline ring in a series of anthracycline antibiotics on the example of <i>N</i>,<i>N</i>-diallyl derivative of daunorubicin using the first and the second generation Grubbs catalysts was reported. The suggested approach can be used to synthesize new anthracycline anticancer agents.</p></div>","PeriodicalId":756,"journal":{"name":"Russian Chemical Bulletin","volume":"73 10","pages":"3109 - 3112"},"PeriodicalIF":1.7,"publicationDate":"2024-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142778413","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
Research in the field of preparing polymer materials of tribological design for dry friction units 干摩擦单元摩擦学设计高分子材料制备研究
IF 1.7 4区 化学
Russian Chemical Bulletin Pub Date : 2024-12-06 DOI: 10.1007/s11172-024-4396-2
V. V. Shaposhnikova, M. O. Panova
{"title":"Research in the field of preparing polymer materials of tribological design for dry friction units","authors":"V. V. Shaposhnikova,&nbsp;M. O. Panova","doi":"10.1007/s11172-024-4396-2","DOIUrl":"10.1007/s11172-024-4396-2","url":null,"abstract":"<div><p>The review summarizes and analyzes the results of research by scientists from the scientific school of Academician V. V. Korshak in the field of developing polymer composite materials of tribological design for dry friction units and studying their properties carried out under the guidance of Professor A. P. Krasnov in the XXI century. The regularities of affecting the chemical structure and molecular weight of polymers, type of filler, and friction conditions (temperature, environment) on the course of tribochemical processes, wear, and coefficient of friction were considered during the study of materials based on various classes of polymers (polyarylene ether ketones, polyarylates, polyamides, and phenol-formaldehyde resins).</p></div>","PeriodicalId":756,"journal":{"name":"Russian Chemical Bulletin","volume":"73 10","pages":"2801 - 2814"},"PeriodicalIF":1.7,"publicationDate":"2024-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142778419","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
Triple-decker complexes with a bridging diborolyl ligand: synthesis and structures 带桥接二硼基配体的三层配合物：合成与结构
IF 1.7 4区 化学
Russian Chemical Bulletin Pub Date : 2024-12-06 DOI: 10.1007/s11172-024-4405-5
A. S. Romanov, D. V. Muratov
{"title":"Triple-decker complexes with a bridging diborolyl ligand: synthesis and structures","authors":"A. S. Romanov,&nbsp;D. V. Muratov","doi":"10.1007/s11172-024-4405-5","DOIUrl":"10.1007/s11172-024-4405-5","url":null,"abstract":"<div><p>Triple-decker complexes with a bridging diborolyl ligand CpCo(μ-1,3-C<sub>3</sub>B<sub>2</sub>Me<sub>5</sub>)-M(C<sub>5</sub>R<sub>5</sub>) (M = Fe, R = H (<b>2a</b>), Me (<b>2b</b>); M = Ni, R = H (<b>3</b>)) were synthesized in high yields by electrophilic stacking of the sandwich anion [CpCo(1,3-C<sub>3</sub>B<sub>2</sub>Me<sub>5</sub>)]<sup>−</sup> with the labile complexes [CpFe(SMe<sub>2</sub>)<sub>3</sub>]<sup>+</sup>, [Cp*Fe(MeCN)<sub>3</sub>]<sup>+</sup>, and [CpNi(SMe<sub>2</sub>)<sub>2</sub>]<sup>+</sup>, respectively. The structures of complexes <b>2a</b>, <b>2b</b>, and <b>3</b> were determined by X-ray diffraction. The influence of additional unpaired electrons on the structural changes due to the transition from the 30-electron FeCo triple-decker complexes to the 32-electron NiCo complex was investigated.</p></div>","PeriodicalId":756,"journal":{"name":"Russian Chemical Bulletin","volume":"73 10","pages":"2883 - 2889"},"PeriodicalIF":1.7,"publicationDate":"2024-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142778421","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
An improved synthesis of α,β-unsaturated enal or enone dimethylhydrazones α，β-不饱和烯醛或烯酮二甲基腙的改进合成
IF 1.7 4区 化学
Russian Chemical Bulletin Pub Date : 2024-12-06 DOI: 10.1007/s11172-024-4427-z
A. B. Koldobskii, A. A. Druzina, O. S. Shilova
{"title":"An improved synthesis of α,β-unsaturated enal or enone dimethylhydrazones","authors":"A. B. Koldobskii,&nbsp;A. A. Druzina,&nbsp;O. S. Shilova","doi":"10.1007/s11172-024-4427-z","DOIUrl":"10.1007/s11172-024-4427-z","url":null,"abstract":"<div><p>Dimethylhydrazones of β-dimethylaminomethyl-substituted carbonyl compounds treated with methyl iodide underwent chemoselective methylation at the trialkylamino group. Subsequent treatment of the resulting iodomethylates with bases yielded dimethylhydrazones of α,β-unsaturated enals or enones in high yields. For unsaturated hydrazones, which were stable to bases, the optimal cleaving agent was an aqueous solution of KOH; if labile trimethylsilyl groups were present in the substrate, the best results were obtained with 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU).</p></div>","PeriodicalId":756,"journal":{"name":"Russian Chemical Bulletin","volume":"73 10","pages":"3094 - 3098"},"PeriodicalIF":1.7,"publicationDate":"2024-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142778137","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
Ratiometric fluorescent chemosensor for mercury(ii) cations in aqueous solution based on the crown-containing bis(chromophoric) 1,8-naphthalimide—styrylpyridine system 基于含冠双（显色）1,8-萘酰亚胺-苯基吡啶体系的水溶液中汞（ii）阳离子的比例荧光化学传感器
IF 1.7 4区 化学
Russian Chemical Bulletin Pub Date : 2024-12-06 DOI: 10.1007/s11172-024-4409-1
P. A. Panchenko, A. S. Polyakova, M. A. Ustimova, A. V. Efremenko, A. V. Feofanov, Yu. V. Fedorov, O. A. Fedorova
{"title":"Ratiometric fluorescent chemosensor for mercury(ii) cations in aqueous solution based on the crown-containing bis(chromophoric) 1,8-naphthalimide—styrylpyridine system","authors":"P. A. Panchenko,&nbsp;A. S. Polyakova,&nbsp;M. A. Ustimova,&nbsp;A. V. Efremenko,&nbsp;A. V. Feofanov,&nbsp;Yu. V. Fedorov,&nbsp;O. A. Fedorova","doi":"10.1007/s11172-024-4409-1","DOIUrl":"10.1007/s11172-024-4409-1","url":null,"abstract":"<div><p>The crown-containing bis(chromophoric) chemosensor for mercury(II) cations in an aqueous solution was synthesized using the azide—alkyne 1,3-dipolar cycloaddition click reaction. The synthesized compound contains the 4-methoxy-1,8-naphthalimide fragment acting as the electron excitation energy donor and styrylpyridine being the chromorphore-acceptor. Upon the excitation of the naphthalimide residue with the visible light, the resonance energy transfer (RET) occurs, and its efficiency decreases as a result of complex formation with Hg<sup>2+</sup> cations. The changes in the fluorescence spectrum observed upon the addition of Hg<sup>2+</sup> allow one to detect the ratiometric fluorescence response due to an increase in the ratio of emission intensities in the donor and acceptor channels. Based on the spectrophotometric and spectrofluorimetric titration data, the logarithms of the stability constants (log<i>K</i>) for the 1 : 1 metal—ligand complex were calculated to be 5.37±0.05 and 5.81±0.06, respectively. The proposed fluoroionophore is characterized by the detection limit of Hg<sup>2+</sup> ions in water at pH 4.5 equal to 40 nmol L<sup>−1</sup>. The ability of the synthesized chemosensor to perform fluorescence imaging of mercury(II) cations in living cells was also analyzed.</p></div>","PeriodicalId":756,"journal":{"name":"Russian Chemical Bulletin","volume":"73 10","pages":"2921 - 2935"},"PeriodicalIF":1.7,"publicationDate":"2024-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142778476","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 monomers and polymers containing oligocationic groups 含低聚基团的单体和聚合物的合成
IF 1.7 4区 化学
Russian Chemical Bulletin Pub Date : 2024-12-06 DOI: 10.1007/s11172-024-4423-3
N. K. Davydova, V. N. Sergeev
{"title":"Synthesis of monomers and polymers containing oligocationic groups","authors":"N. K. Davydova,&nbsp;V. N. Sergeev","doi":"10.1007/s11172-024-4423-3","DOIUrl":"10.1007/s11172-024-4423-3","url":null,"abstract":"<div><p>The synthesis of amides of acrylic acid with oligo[1,4-piperidines] <b>(1)</b> has resulted in the development of compounds containing both easily polymerizable groups and ionogenic groups in the form of tertiary amino groups, which can be protonated in acidic aqueous media. Consequently, new oligocationic polymers have been obtained. The simplicity of our proposed synthesis method, which involves the use of readily available reagents, enables the automation of this process to obtain oligocationic monomers of varying lengths. The resulting compounds <b>1</b> can serve as monomers for the production of polyelectrolytes with increased exchange capacity.</p></div>","PeriodicalId":756,"journal":{"name":"Russian Chemical Bulletin","volume":"73 10","pages":"3065 - 3071"},"PeriodicalIF":1.7,"publicationDate":"2024-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142778491","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
Reactions of allylic quaternary ammonium salts with alcohols in the synthesis of terpene ethers 烯丙基季铵盐与醇在萜烯醚合成中的反应
IF 1.7 4区 化学
Russian Chemical Bulletin Pub Date : 2024-12-06 DOI: 10.1007/s11172-024-4410-8
E. A. Petrushkina, D. V. Khomishin
{"title":"Reactions of allylic quaternary ammonium salts with alcohols in the synthesis of terpene ethers","authors":"E. A. Petrushkina,&nbsp;D. V. Khomishin","doi":"10.1007/s11172-024-4410-8","DOIUrl":"10.1007/s11172-024-4410-8","url":null,"abstract":"<div><p>Reactions of quaternary ammonium salts bearing 2,7-dimethylocta-2,7-dien-1-yl moiety with primary alcohols (isoamyl and crotyl alcohols and geraniol) can be directed mainly to the allylic position to afford the corresponding ethers with the displacement of the ammonium leaving group. The reaction took place in the presence of NaOH under solvent-free conditions upon reflux or at heating at 150 °C. An important factor of regio-selectivity is a high steric hindrance of such ammonium group leaving group as R<sub>2</sub>(Allyl)N<sup>+</sup>. In the case of the derivative with Et<sub>2</sub>MeN<sup>+</sup> group, alcohols attack the alkyl substituent.</p></div>","PeriodicalId":756,"journal":{"name":"Russian Chemical Bulletin","volume":"73 10","pages":"2936 - 2940"},"PeriodicalIF":1.7,"publicationDate":"2024-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142778477","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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