Pub Date : 2020-05-03DOI: 10.1080/10426507.2019.1700412
Tianfeng Cai, Yueru Tian, Jie Zhang
Abstract A series of heterojunction catalysts (CuCN-X) were successfully fabricated by loading the different amounts of Keggin type Cu mono-substituted heteropoly acid (HPW11Cu) on the surface of hollow nanospheres g-C3N4 (HSCN). The HSCNs were prepared by using SiO2 as a hard template. The chemical structure, porosity, morphology and electronic property of the prepared catalysts were investigated using XRD, SEM, N2-absorption isotherm and XPS. The results indicated that the modified HSCN show prominent absorption in the visible light range and decrease the band gap. The greatly enhanced photocatalytic activity of obtained CuCN-X have been shown by the degradation of Rhodamine B (RhB), reduction of CO2 and production of photocatalytic hydrogen under visible light irradiation. More significantly, CuCN-15 has shown significantly improved photocatalytic performance at 4.5, 3.5 and 3.3 times higher that of than HSCN for the degradation of RhB, reduction of CO2 and production of photocatalytic hydrogen, respectively. Furthermore, the mechanism for the enhanced photocatalytic activity of CuCN-X is proposed to be due to the formation of heterojunction. The electrons can be rapidly transferred from HSCN to HPW11Cu, in which facilitate charge separation and charge transfer. Graphical Abstract
{"title":"Preparation of hollow nanospheres g-C3N4 loaded by Keggin type Cu mono-substituted heteropoly acid with enhanced visible-light harvesting and electron transfer properties for high-efficiency photocatalysis","authors":"Tianfeng Cai, Yueru Tian, Jie Zhang","doi":"10.1080/10426507.2019.1700412","DOIUrl":"https://doi.org/10.1080/10426507.2019.1700412","url":null,"abstract":"Abstract A series of heterojunction catalysts (CuCN-X) were successfully fabricated by loading the different amounts of Keggin type Cu mono-substituted heteropoly acid (HPW11Cu) on the surface of hollow nanospheres g-C3N4 (HSCN). The HSCNs were prepared by using SiO2 as a hard template. The chemical structure, porosity, morphology and electronic property of the prepared catalysts were investigated using XRD, SEM, N2-absorption isotherm and XPS. The results indicated that the modified HSCN show prominent absorption in the visible light range and decrease the band gap. The greatly enhanced photocatalytic activity of obtained CuCN-X have been shown by the degradation of Rhodamine B (RhB), reduction of CO2 and production of photocatalytic hydrogen under visible light irradiation. More significantly, CuCN-15 has shown significantly improved photocatalytic performance at 4.5, 3.5 and 3.3 times higher that of than HSCN for the degradation of RhB, reduction of CO2 and production of photocatalytic hydrogen, respectively. Furthermore, the mechanism for the enhanced photocatalytic activity of CuCN-X is proposed to be due to the formation of heterojunction. The electrons can be rapidly transferred from HSCN to HPW11Cu, in which facilitate charge separation and charge transfer. Graphical Abstract","PeriodicalId":20043,"journal":{"name":"Phosphorus Sulfur and Silicon and The Related Elements","volume":"1 1","pages":"399 - 408"},"PeriodicalIF":0.0,"publicationDate":"2020-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82981489","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-05-03DOI: 10.1080/10426507.2019.1700376
V. Uvarov, D. A. de Vekki
Abstract Using a “chiral pool” approach, a number of chiral thiolate and sulfide ligands based on natural terpenes and terpenoids have been synthesized in a few simple steps. Two new Rh-thiolate complexes with the formula [Rh(CO)2(μ-SR)]2 were obtained. The influence of these complexes and catalytic systems formed by combining the synthesized ligands with [Rh(CO)2(μ-Cl)]2 and [Rh(cod)(μ-Cl)]2, on the reaction rate, chemoselectivity, stereoselectivity and formation of tetraphenyldisiloxane in Rh-catalyzed asymmetric hydrosilylation of acetophenone as a model reaction have been studied. Mechanistic aspects of formation of silyl enol ether as a side product in the presence of S-containing ligands are presented. Graphical Abstract
{"title":"First study of rhodium(I) complexes with chiral sulfur-containing terpenoids as catalytic systems for ketone hydrosilylation","authors":"V. Uvarov, D. A. de Vekki","doi":"10.1080/10426507.2019.1700376","DOIUrl":"https://doi.org/10.1080/10426507.2019.1700376","url":null,"abstract":"Abstract Using a “chiral pool” approach, a number of chiral thiolate and sulfide ligands based on natural terpenes and terpenoids have been synthesized in a few simple steps. Two new Rh-thiolate complexes with the formula [Rh(CO)2(μ-SR)]2 were obtained. The influence of these complexes and catalytic systems formed by combining the synthesized ligands with [Rh(CO)2(μ-Cl)]2 and [Rh(cod)(μ-Cl)]2, on the reaction rate, chemoselectivity, stereoselectivity and formation of tetraphenyldisiloxane in Rh-catalyzed asymmetric hydrosilylation of acetophenone as a model reaction have been studied. Mechanistic aspects of formation of silyl enol ether as a side product in the presence of S-containing ligands are presented. Graphical Abstract","PeriodicalId":20043,"journal":{"name":"Phosphorus Sulfur and Silicon and The Related Elements","volume":"10 4 1","pages":"376 - 387"},"PeriodicalIF":0.0,"publicationDate":"2020-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82705136","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-05-03DOI: 10.1080/10426507.2019.1700260
Hui Li, Aoyun Lu, Yanqiu Zhang, Yanqing Peng, G. Song
Abstract To explore a new skeleton with nematicidal activity, a series of novel azabicyclo derivatives containing a thiazole moiety were designed, synthesized and evaluated for their nematicidal activities. The bioassay results against pine-wood nematodes (Bursaphelenchus xylophilus) showed that most of the title compounds displayed nematicidal activity at a concentration of 40 mg/L. Especially, the title compounds2-((8-methyl-8-azabicyclo[3.2.1]octan-3-yl)oxy)-4-(4-chlorophenyl)thiazole (7e), 2-((8-methyl-8-azabicyclo[3.2.1]octan-3-yl)thio)-4-phenylthiazole (10a) and 2-((8-methyl-8-azabicyclo [3.2.1]octan-3-yl)thio)-4-(4-chlorophenyl)thiazole (10e) exhibited more than 90% mortality against Bursaphelenchus xylophilus. Graphical Abstract
{"title":"Synthesis of novel azabicyclo derivatives containing a thiazole moiety and their biological activity against pine-wood nematodes","authors":"Hui Li, Aoyun Lu, Yanqiu Zhang, Yanqing Peng, G. Song","doi":"10.1080/10426507.2019.1700260","DOIUrl":"https://doi.org/10.1080/10426507.2019.1700260","url":null,"abstract":"Abstract To explore a new skeleton with nematicidal activity, a series of novel azabicyclo derivatives containing a thiazole moiety were designed, synthesized and evaluated for their nematicidal activities. The bioassay results against pine-wood nematodes (Bursaphelenchus xylophilus) showed that most of the title compounds displayed nematicidal activity at a concentration of 40 mg/L. Especially, the title compounds2-((8-methyl-8-azabicyclo[3.2.1]octan-3-yl)oxy)-4-(4-chlorophenyl)thiazole (7e), 2-((8-methyl-8-azabicyclo[3.2.1]octan-3-yl)thio)-4-phenylthiazole (10a) and 2-((8-methyl-8-azabicyclo [3.2.1]octan-3-yl)thio)-4-(4-chlorophenyl)thiazole (10e) exhibited more than 90% mortality against Bursaphelenchus xylophilus. Graphical Abstract","PeriodicalId":20043,"journal":{"name":"Phosphorus Sulfur and Silicon and The Related Elements","volume":"20 4 1","pages":"371 - 375"},"PeriodicalIF":0.0,"publicationDate":"2020-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83540889","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-05-03DOI: 10.1080/10426507.2019.1700415
Siti Syaida Sirat, Hafiz Malik Hussien Abdelnasir, O. Shawkataly
Abstract The solid-state structures of compounds PPh2CH2SPh (1) and PPh2C6H4SMe (2) were determined by single crystal X-ray diffraction. Experimental results on the molecular structures of compounds 1 and 2 were supported by Hirshfeld surface analysis and Density Functional Theory (DFT). The computed values calculated at DFT level using B3LYP function with 6-311++G (3df, 3pd) (P, S) and 6-31G* (C, H) basis sets are in good agreement with the experimental results. Graphical Abstract
{"title":"A combined X-ray crystallography and theoretical study of PPh2CH2SPh and PPh2C6H4SMe ligands","authors":"Siti Syaida Sirat, Hafiz Malik Hussien Abdelnasir, O. Shawkataly","doi":"10.1080/10426507.2019.1700415","DOIUrl":"https://doi.org/10.1080/10426507.2019.1700415","url":null,"abstract":"Abstract The solid-state structures of compounds PPh2CH2SPh (1) and PPh2C6H4SMe (2) were determined by single crystal X-ray diffraction. Experimental results on the molecular structures of compounds 1 and 2 were supported by Hirshfeld surface analysis and Density Functional Theory (DFT). The computed values calculated at DFT level using B3LYP function with 6-311++G (3df, 3pd) (P, S) and 6-31G* (C, H) basis sets are in good agreement with the experimental results. Graphical Abstract","PeriodicalId":20043,"journal":{"name":"Phosphorus Sulfur and Silicon and The Related Elements","volume":"1 1","pages":"429 - 436"},"PeriodicalIF":0.0,"publicationDate":"2020-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73334685","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-05-03DOI: 10.1080/10426507.2019.1700414
V. A. Ivolgina, M. S. Chernov'yants, L. Popov, V. V. Suslonov, Natalya A. Avtushenko, Nikolay V. Luanguzov
Abstract As a part of investigation of thyreostatic activity of mercapto-substituted triazoles, the structure, spectroscopic properties of 4-amino-5-(furan-2-yl)-4H-1,2,4-triazole-3-thione were obtained. 4-amino-5-(furan-2-yl)-4H-1,2,4-triazole-3-thione forms steady charge-transfer complex in dilute chloroform solution, coordinating one iodine molecule (lgβ = 3.47). The reaction product of 4-amino-5-(furan-2-yl)-4H-1,2,4-triazole-3-thione is presented by uncharged adduct: C6H6N4OS·I2. The crystal structure of the adduct was studied in detail by single crystal X-ray diffraction. The results of thermogravimetric analysis revealed the stability of adduct in a solid state at the temperature range 50–500 °C. Graphical Abstract
{"title":"Structural study and thermal behavior of novel interaction product of 4-amino-5-(furan-2-yl)-4H-1,2,4-triazole-3-thione with molecular iodine","authors":"V. A. Ivolgina, M. S. Chernov'yants, L. Popov, V. V. Suslonov, Natalya A. Avtushenko, Nikolay V. Luanguzov","doi":"10.1080/10426507.2019.1700414","DOIUrl":"https://doi.org/10.1080/10426507.2019.1700414","url":null,"abstract":"Abstract As a part of investigation of thyreostatic activity of mercapto-substituted triazoles, the structure, spectroscopic properties of 4-amino-5-(furan-2-yl)-4H-1,2,4-triazole-3-thione were obtained. 4-amino-5-(furan-2-yl)-4H-1,2,4-triazole-3-thione forms steady charge-transfer complex in dilute chloroform solution, coordinating one iodine molecule (lgβ = 3.47). The reaction product of 4-amino-5-(furan-2-yl)-4H-1,2,4-triazole-3-thione is presented by uncharged adduct: C6H6N4OS·I2. The crystal structure of the adduct was studied in detail by single crystal X-ray diffraction. The results of thermogravimetric analysis revealed the stability of adduct in a solid state at the temperature range 50–500 °C. Graphical Abstract","PeriodicalId":20043,"journal":{"name":"Phosphorus Sulfur and Silicon and The Related Elements","volume":"30 1","pages":"421 - 428"},"PeriodicalIF":0.0,"publicationDate":"2020-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89864757","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-05-03DOI: 10.1080/10426507.2019.1700377
Haokun Pan, Hua Li, Huijun Liu, Xingxian Zhang
Abstract A mild, efficient and highly regioselective addition of trimethylsilyl cyanide (TMSCN) to α,β-unsaturated diesters has been achieved by using MgI2 etherate as catalyst under solvent-free conditions. This protocol provides the corresponding β-cyano esters in high yields. Graphical Abstract
{"title":"An efficient hydrocyanation of α, β-unsaturated diesters with TMSCN catalyzed by MgI2 etherate","authors":"Haokun Pan, Hua Li, Huijun Liu, Xingxian Zhang","doi":"10.1080/10426507.2019.1700377","DOIUrl":"https://doi.org/10.1080/10426507.2019.1700377","url":null,"abstract":"Abstract A mild, efficient and highly regioselective addition of trimethylsilyl cyanide (TMSCN) to α,β-unsaturated diesters has been achieved by using MgI2 etherate as catalyst under solvent-free conditions. This protocol provides the corresponding β-cyano esters in high yields. Graphical Abstract","PeriodicalId":20043,"journal":{"name":"Phosphorus Sulfur and Silicon and The Related Elements","volume":"470 1","pages":"388 - 391"},"PeriodicalIF":0.0,"publicationDate":"2020-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79910803","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-05-03DOI: 10.1080/10426507.2019.1700378
Lingxiao Guo, Yanyun Bai, Dianlong Zhang, Guoyong Wang
Abstract High-amine-value aminopropyl polysiloxanes (APSO) were designed and synthesized via two different methods. APSO was then aminated with glucono-δ-lactone (GL) to produce sugar-modified amodimethicone (GLAP). The properties of GLAP were investigated systematically. GLAP has a low critical aggregation concentration (CAC) and displays low surface tensions at CAC (γCAC). GLAP forms spherical aggregates in solution. Formation of micelles and adsorption at the air-water interface are spontaneous. Moreover, its good solubility and excellent wetting properties make GLAP a potential candidate for application in paints, coatings, and agricultural adjuvants. Graphical Abstract
{"title":"Synthesis and properties of a glucono-δ-lactone-modified silicone surfactant from high-amine-value amodimethicone","authors":"Lingxiao Guo, Yanyun Bai, Dianlong Zhang, Guoyong Wang","doi":"10.1080/10426507.2019.1700378","DOIUrl":"https://doi.org/10.1080/10426507.2019.1700378","url":null,"abstract":"Abstract High-amine-value aminopropyl polysiloxanes (APSO) were designed and synthesized via two different methods. APSO was then aminated with glucono-δ-lactone (GL) to produce sugar-modified amodimethicone (GLAP). The properties of GLAP were investigated systematically. GLAP has a low critical aggregation concentration (CAC) and displays low surface tensions at CAC (γCAC). GLAP forms spherical aggregates in solution. Formation of micelles and adsorption at the air-water interface are spontaneous. Moreover, its good solubility and excellent wetting properties make GLAP a potential candidate for application in paints, coatings, and agricultural adjuvants. Graphical Abstract","PeriodicalId":20043,"journal":{"name":"Phosphorus Sulfur and Silicon and The Related Elements","volume":"43 1","pages":"392 - 398"},"PeriodicalIF":0.0,"publicationDate":"2020-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85536479","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-03-03DOI: 10.1080/10426507.2019.1662015
A. Gobouri, Naif A. Alshanbari, M. A. Mohamed, S. Abdel‐Hafez
Abstract Ethylcarboxylate and acetyl selenoloquinoline derivatives were prepared in a one pot synthesis via reaction of sodium hydrogen selenide and 2-chloro-3-cyano-4-methylquinoline followed by reactions with ethyl chloroacetate and chloro acetone respectively which used as precursors to synthesize many of tetra and pentacyclic systems. A new series of pyrimido [4′,5′:4,5]selenolo[2,3-b]quinoline, thiazino[2’,3’:4,5]selenolo[2,3-b]quinoline, oxazino[2',3':4,5]selenolo[3,2-b]quinoline, pyrido[2′,3′:4,5]selenolo[2,3-b]quinoline, pyrido[2′,3′:4,5]selenolo[2,3-b]quinoline-2-substituted selenyl and selenolo[2′,3′:5,6]pyrido[2″,3″:4,5]selenolo[2,3-b]quinoline derivatives were prepared. Elemental analysis, IR, 1H NMR, 13C NMR and mass spectra confirmed the structures of the newly synthesized compounds. Graphical Abstract
{"title":"One pot synthesis of ethyl carboxylate and acetyl selenolo[2,3-b]quinoline derivatives and their tetra/pentacyclic systems","authors":"A. Gobouri, Naif A. Alshanbari, M. A. Mohamed, S. Abdel‐Hafez","doi":"10.1080/10426507.2019.1662015","DOIUrl":"https://doi.org/10.1080/10426507.2019.1662015","url":null,"abstract":"Abstract Ethylcarboxylate and acetyl selenoloquinoline derivatives were prepared in a one pot synthesis via reaction of sodium hydrogen selenide and 2-chloro-3-cyano-4-methylquinoline followed by reactions with ethyl chloroacetate and chloro acetone respectively which used as precursors to synthesize many of tetra and pentacyclic systems. A new series of pyrimido [4′,5′:4,5]selenolo[2,3-b]quinoline, thiazino[2’,3’:4,5]selenolo[2,3-b]quinoline, oxazino[2',3':4,5]selenolo[3,2-b]quinoline, pyrido[2′,3′:4,5]selenolo[2,3-b]quinoline, pyrido[2′,3′:4,5]selenolo[2,3-b]quinoline-2-substituted selenyl and selenolo[2′,3′:5,6]pyrido[2″,3″:4,5]selenolo[2,3-b]quinoline derivatives were prepared. Elemental analysis, IR, 1H NMR, 13C NMR and mass spectra confirmed the structures of the newly synthesized compounds. Graphical Abstract","PeriodicalId":20043,"journal":{"name":"Phosphorus Sulfur and Silicon and The Related Elements","volume":"84 1","pages":"211 - 217"},"PeriodicalIF":0.0,"publicationDate":"2020-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84291333","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-03-03DOI: 10.1080/10426507.2019.1674300
Marziyeh Pourmosavi, M. Mosslemin, A. Hassanabadi
Abstract A simple, one-pot synthesis of five highly functionalized selenazole derivatives has been achieved in moderate-to-good yields via a three-component condensation of ethyl-2-chloro-3-oxo-butyrate, potassium selenocyanate and various substituted hydrazines or hydrazides in acetone at room temperature. Graphical Abstract
{"title":"Synthesis of functionalized selenazole derivatives via a three-component condensation of ethyl-2-chloro-3-oxo-butyrate, potassium selenocyanate and hydrazine or hydrazide derivatives","authors":"Marziyeh Pourmosavi, M. Mosslemin, A. Hassanabadi","doi":"10.1080/10426507.2019.1674300","DOIUrl":"https://doi.org/10.1080/10426507.2019.1674300","url":null,"abstract":"Abstract A simple, one-pot synthesis of five highly functionalized selenazole derivatives has been achieved in moderate-to-good yields via a three-component condensation of ethyl-2-chloro-3-oxo-butyrate, potassium selenocyanate and various substituted hydrazines or hydrazides in acetone at room temperature. Graphical Abstract","PeriodicalId":20043,"journal":{"name":"Phosphorus Sulfur and Silicon and The Related Elements","volume":"25 1","pages":"245 - 248"},"PeriodicalIF":0.0,"publicationDate":"2020-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80295594","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-03-03DOI: 10.1080/10426507.2019.1661414
A. M. Jadhav, S. Balwe, Y. Jeong
Abstract An efficient one-pot synthesis of 1 H-indazolo[1,2-b]phthalazine-trione and spiro-triazolo[1,2-a]indazole-tetraone derivatives via three-component condensation reaction of phthalhydrazide or 4-phenylurazole, aldehydes or isatins and dimedone in the presence of a catalytic amount of silica-supported tungstic acid (STA), as a heterogeneous solid acid catalyst under solvent-free conditions is presented. This ecofriendly protocol offers several advantages such as a cost-effective procedure with excellent yields, short reaction time, simple workup, recovery and reusability of catalyst with broad scope of usable substrates. This has made the protocol sustainable and economic. Graphical Abstract
摘要在无溶剂条件下，以硅负载型钨酸(STA)为非均相固体酸催化剂，通过邻苯肼或4-苯拉唑、醛类或isatins和二美酮的三组分缩合反应，高效地一锅合成了1 - h -吲哚唑[1,2-b]邻苯二唑-三酮和螺-三唑[1,2-a]吲哚唑-四酮衍生物。这种生态友好的方案具有几个优点，例如具有优异收率的成本效益的程序，反应时间短，简单的处理，催化剂的回收和可重用性，具有广泛的可用底物范围。这使得议定书具有可持续性和经济性。图形抽象
{"title":"Silica-supported tungstic acid (STA): A recyclable catalyst for the synthesis of 1H-indazolo [1,2-b]phthalazine-trione and spiro-triazolo[1,2-a]indazole-tetraone derivatives under solvent-free condition","authors":"A. M. Jadhav, S. Balwe, Y. Jeong","doi":"10.1080/10426507.2019.1661414","DOIUrl":"https://doi.org/10.1080/10426507.2019.1661414","url":null,"abstract":"Abstract An efficient one-pot synthesis of 1 H-indazolo[1,2-b]phthalazine-trione and spiro-triazolo[1,2-a]indazole-tetraone derivatives via three-component condensation reaction of phthalhydrazide or 4-phenylurazole, aldehydes or isatins and dimedone in the presence of a catalytic amount of silica-supported tungstic acid (STA), as a heterogeneous solid acid catalyst under solvent-free conditions is presented. This ecofriendly protocol offers several advantages such as a cost-effective procedure with excellent yields, short reaction time, simple workup, recovery and reusability of catalyst with broad scope of usable substrates. This has made the protocol sustainable and economic. Graphical Abstract","PeriodicalId":20043,"journal":{"name":"Phosphorus Sulfur and Silicon and The Related Elements","volume":"240 1","pages":"201 - 210"},"PeriodicalIF":0.0,"publicationDate":"2020-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91529523","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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