{"title":"分子溴的无溶剂合成及其在芳香化合物原位溴化中的应用","authors":"J. Järv, I. Rahu","doi":"10.3176/proc.2020.3.04","DOIUrl":null,"url":null,"abstract":"Synthesis of molecular bromine in solventfree reaction was studied using two different reaction mixtures. The first mixture consisted of solid KNO3 and gaseous HBr, while the second setup used solid NaBr, KNO3 and gaseous HCl. Bromine formation was determined through bromination reaction of acetanilide, added into the reaction mixture, and monitored by the gas chromatography– mass spectrometry (GC–MS). It was found that this solventfree oxidative bromination technique could also be used for bromination of several other activated aromatic compounds but bromination of deactivated aromatics under the same condition was not successful, pointing to the need for a catalyst. The developed solventfree bromination method for aromatics has several benefits as there is no need for heating, the oxidizing agent is mild, and product purification procedure is simple. All mentioned features make this process quite perspective for synthetic applications.","PeriodicalId":54577,"journal":{"name":"Proceedings of the Estonian Academy of Sciences","volume":null,"pages":null},"PeriodicalIF":1.0000,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Solvent-free synthesis of molecular bromine and its application for in situ bromination of aromatic compounds\",\"authors\":\"J. Järv, I. Rahu\",\"doi\":\"10.3176/proc.2020.3.04\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Synthesis of molecular bromine in solventfree reaction was studied using two different reaction mixtures. The first mixture consisted of solid KNO3 and gaseous HBr, while the second setup used solid NaBr, KNO3 and gaseous HCl. Bromine formation was determined through bromination reaction of acetanilide, added into the reaction mixture, and monitored by the gas chromatography– mass spectrometry (GC–MS). It was found that this solventfree oxidative bromination technique could also be used for bromination of several other activated aromatic compounds but bromination of deactivated aromatics under the same condition was not successful, pointing to the need for a catalyst. The developed solventfree bromination method for aromatics has several benefits as there is no need for heating, the oxidizing agent is mild, and product purification procedure is simple. All mentioned features make this process quite perspective for synthetic applications.\",\"PeriodicalId\":54577,\"journal\":{\"name\":\"Proceedings of the Estonian Academy of Sciences\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":1.0000,\"publicationDate\":\"2020-01-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Proceedings of the Estonian Academy of Sciences\",\"FirstCategoryId\":\"103\",\"ListUrlMain\":\"https://doi.org/10.3176/proc.2020.3.04\",\"RegionNum\":4,\"RegionCategory\":\"综合性期刊\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"MULTIDISCIPLINARY SCIENCES\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Proceedings of the Estonian Academy of Sciences","FirstCategoryId":"103","ListUrlMain":"https://doi.org/10.3176/proc.2020.3.04","RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"MULTIDISCIPLINARY SCIENCES","Score":null,"Total":0}
Solvent-free synthesis of molecular bromine and its application for in situ bromination of aromatic compounds
Synthesis of molecular bromine in solventfree reaction was studied using two different reaction mixtures. The first mixture consisted of solid KNO3 and gaseous HBr, while the second setup used solid NaBr, KNO3 and gaseous HCl. Bromine formation was determined through bromination reaction of acetanilide, added into the reaction mixture, and monitored by the gas chromatography– mass spectrometry (GC–MS). It was found that this solventfree oxidative bromination technique could also be used for bromination of several other activated aromatic compounds but bromination of deactivated aromatics under the same condition was not successful, pointing to the need for a catalyst. The developed solventfree bromination method for aromatics has several benefits as there is no need for heating, the oxidizing agent is mild, and product purification procedure is simple. All mentioned features make this process quite perspective for synthetic applications.
期刊介绍:
The Proceedings of the Estonian Academy of Sciences is an international scientific open access journal published by the Estonian Academy of Sciences in collaboration with the University of Tartu, Tallinn University of Technology, Tallinn University, and the Estonian University of Life Sciences.
The journal publishes primary research and review papers in the English language. All articles are provided with short Estonian summaries.
All papers to be published in the journal are peer reviewed internationally.
The journal is open to word-wide scientific community for publications in all fields of science represented at the Estonian Academy of Sciences and having certain connection with our part of the world, North Europe and the Baltic area in particular.