{"title":"Synthesis of some 4-(2′-hydroxyaryl)-5-ethyl-2-(N, N-dialkylamino)-1,3-dithiolium salts","authors":"M. Birsa","doi":"10.1080/02786110310001593643","DOIUrl":null,"url":null,"abstract":"The synthesis of 4-(2′-hydroxyaryl)-5-ethyl-2-(N,N-dialkylamino)-1,3-dithiolium salts (6a–e) has been accomplished by the heterocyclization of the corresponding carbodithioates (3a–e). The required starting materials (1a,b) have been prepared by regioselective bromination of 1-(2′-hydroxyaryl)butanones (4a,b). Under basic conditions, salts 6a–e afford anhydro-hydroxides 7a–e, which are mesoionic compounds with an intramolecular charge-transfer UV/Vis absorption where the donor moiety is linked through σ-bonded bridges (C5-S1, C4-S3) to the acceptor moiety.","PeriodicalId":22122,"journal":{"name":"Sulfur Letters","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"2003-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"4","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Sulfur Letters","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1080/02786110310001593643","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 4
Abstract
The synthesis of 4-(2′-hydroxyaryl)-5-ethyl-2-(N,N-dialkylamino)-1,3-dithiolium salts (6a–e) has been accomplished by the heterocyclization of the corresponding carbodithioates (3a–e). The required starting materials (1a,b) have been prepared by regioselective bromination of 1-(2′-hydroxyaryl)butanones (4a,b). Under basic conditions, salts 6a–e afford anhydro-hydroxides 7a–e, which are mesoionic compounds with an intramolecular charge-transfer UV/Vis absorption where the donor moiety is linked through σ-bonded bridges (C5-S1, C4-S3) to the acceptor moiety.