Pub Date : 2018-08-04DOI: 10.26534/kimika.v29i1.22-40
A. Guidote, Mikael John A. Baltazar, Roy Kristian C. Yanela, N. Suzuki
The treatment of allylic alcohols as synthons of carbanions for carbonyl allylation reactions in the presence of a Pd-SnCl2 system has been one of the most interesting and most useful developments demonstrated by Yoshiro Masuyama and co-workers in the field of organic synthesis. The reaction makes use of palladium as an effective catalyst and tin (II) chloride as a low-valent reducing agent which also effectively transforms the allylic group to a nucleophilic group. The organic, as well as organometallic, chemistry of how the transformations occur and how the metals take part in the reaction is of great interest. These could help allow for better optimization of reagents and solvents, for better control of the extent of reaction or yield of desired product, and for possible applications in other reaction systems. This review will focus primarily on the work of Yoshiro Masuyama and various co-workers on carbonyl allylation reactions making use of a Pd-SnCl2 system or substitutes thereof.
{"title":"Palladium-Catalyzed Carbonyl Allylation Reactions Using Tin Chloride: A Mini-Review","authors":"A. Guidote, Mikael John A. Baltazar, Roy Kristian C. Yanela, N. Suzuki","doi":"10.26534/kimika.v29i1.22-40","DOIUrl":"https://doi.org/10.26534/kimika.v29i1.22-40","url":null,"abstract":"The treatment of allylic alcohols as synthons of carbanions for carbonyl allylation reactions in the presence of a Pd-SnCl2 system has been one of the most interesting and most useful developments demonstrated by Yoshiro Masuyama and co-workers in the field of organic synthesis. The reaction makes use of palladium as an effective catalyst and tin (II) chloride as a low-valent reducing agent which also effectively transforms the allylic group to a nucleophilic group. The organic, as well as organometallic, chemistry of how the transformations occur and how the metals take part in the reaction is of great interest. These could help allow for better optimization of reagents and solvents, for better control of the extent of reaction or yield of desired product, and for possible applications in other reaction systems. This review will focus primarily on the work of Yoshiro Masuyama and various co-workers on carbonyl allylation reactions making use of a Pd-SnCl2 system or substitutes thereof.","PeriodicalId":17914,"journal":{"name":"KIMIKA","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85503933","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 : 2018-06-06DOI: 10.26534/KIMIKA.V29I1.17-21
Y D G Edañol, K. Usman, Jr. C. Buenviaje Salvador, Michael E. Mantua, Jr. M. Payawan Leon
Rice hull, a known agricultural waste product, with 21% silica (SiO2) content based on elemental analysis, is a promising starting material for zeolite Y synthesis. In this work, silica derived from rice hull samples were extracted via alkaline treatment using 4M NaOH at 130 °C - 150 °C. Further introduction of NaOH and inclusion of aluminium hydroxide were done before subjecting the materials to subsequent ageing and heating at 95 °C to form the zeolite Y crystals. The samples were then analyzed using Fourier transform infrared spectroscopy (FT-IR) and X-ray diffractometry (XRD). Zeolite Y from commercial silica was also synthesized as negative control and together with commercially available zeolite Y, FT-IR and XRD results showed that they possess similar structures with the rice-hull derived material.
{"title":"Utilizing Silica from Rice Hull for the Hydrothermal Synthesis of Zeolite Y","authors":"Y D G Edañol, K. Usman, Jr. C. Buenviaje Salvador, Michael E. Mantua, Jr. M. Payawan Leon","doi":"10.26534/KIMIKA.V29I1.17-21","DOIUrl":"https://doi.org/10.26534/KIMIKA.V29I1.17-21","url":null,"abstract":"Rice hull, a known agricultural waste product, with 21% silica (SiO2) content based on elemental analysis, is a promising starting material for zeolite Y synthesis. In this work, silica derived from rice hull samples were extracted via alkaline treatment using 4M NaOH at 130 °C - 150 °C. Further introduction of NaOH and inclusion of aluminium hydroxide were done before subjecting the materials to subsequent ageing and heating at 95 °C to form the zeolite Y crystals. The samples were then analyzed using Fourier transform infrared spectroscopy (FT-IR) and X-ray diffractometry (XRD). Zeolite Y from commercial silica was also synthesized as negative control and together with commercially available zeolite Y, FT-IR and XRD results showed that they possess similar structures with the rice-hull derived material.","PeriodicalId":17914,"journal":{"name":"KIMIKA","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88846951","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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