Ecofriendly ketalization of isatin using heteropolycompounds as catalysts

Detalhes bibliográficos
Autor(a) principal: Santos, Edeilza Lopes dos
Data de Publicação: 2008
Outros Autores: Gomes Jr, Walter Alves, Ribeiro, Núbia Moura, Andrade, Heloysa Martins Carvalho
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UFBA
Texto Completo: http://www.repositorio.ufba.br/ri/handle/ri/5999
Resumo: Acesso restrito: Texto completo. p. 18-23
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spelling Santos, Edeilza Lopes dosGomes Jr, Walter AlvesRibeiro, Núbia MouraAndrade, Heloysa Martins CarvalhoSantos, Edeilza Lopes dosGomes Jr, Walter AlvesRibeiro, Núbia MouraAndrade, Heloysa Martins Carvalho2012-05-30T18:40:23Z20081381-1169http://www.repositorio.ufba.br/ri/handle/ri/5999v. 295, n. 1-2Acesso restrito: Texto completo. p. 18-23The dioxolane ketals of isatin and 5-chloroisatin were prepared using an efficient and cleaner procedure than the usual synthetic routes. Keggin heteropolyacids, namely, heteropolyphosphotungstic acid (HPW), HPW/SiO2 and Cs2.2HPW, have proven to be useful catalysts, allowing to the fast, selective and solvent-less preparation of ketals, with high yields and 100% selectivity. The homogeneous HPW catalyst may be successfully heterogenized by partial exchange of H+ for Cs+ but some evidenceswere found of significant homogeneous contributions of leachedHPWwhen the silica supported catalysts (HPW/SiO2) was used in the ketalization reaction. The Cs2.2HPW (Cs2.2H0.8PW12O40) catalysts may be repeatedly used but a progressive activity losswas assigned to residual organic materials that could not be removed after several dichloromethane washings.Submitted by JURANDI DE SOUZA SILVA (jssufba@hotmail.com) on 2012-05-30T18:40:22Z No. of bitstreams: 1 __ac.els-cdn.com_S138111...679cb2bea5adc1d55e8491f6d49e7.pdf: 247200 bytes, checksum: 3b4c29ea04c4cdc4fc32fce8d293c20b (MD5)Made available in DSpace on 2012-05-30T18:40:23Z (GMT). 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dc.title.pt_BR.fl_str_mv Ecofriendly ketalization of isatin using heteropolycompounds as catalysts
dc.title.alternative.pt_BR.fl_str_mv JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL
title Ecofriendly ketalization of isatin using heteropolycompounds as catalysts
spellingShingle Ecofriendly ketalization of isatin using heteropolycompounds as catalysts
Santos, Edeilza Lopes dos
Keggin heteropolycompounds
Heteropolyphosphotungstic acid
Isatin
Ketalization
title_short Ecofriendly ketalization of isatin using heteropolycompounds as catalysts
title_full Ecofriendly ketalization of isatin using heteropolycompounds as catalysts
title_fullStr Ecofriendly ketalization of isatin using heteropolycompounds as catalysts
title_full_unstemmed Ecofriendly ketalization of isatin using heteropolycompounds as catalysts
title_sort Ecofriendly ketalization of isatin using heteropolycompounds as catalysts
author Santos, Edeilza Lopes dos
author_facet Santos, Edeilza Lopes dos
Gomes Jr, Walter Alves
Ribeiro, Núbia Moura
Andrade, Heloysa Martins Carvalho
author_role author
author2 Gomes Jr, Walter Alves
Ribeiro, Núbia Moura
Andrade, Heloysa Martins Carvalho
author2_role author
author
author
dc.contributor.author.fl_str_mv Santos, Edeilza Lopes dos
Gomes Jr, Walter Alves
Ribeiro, Núbia Moura
Andrade, Heloysa Martins Carvalho
Santos, Edeilza Lopes dos
Gomes Jr, Walter Alves
Ribeiro, Núbia Moura
Andrade, Heloysa Martins Carvalho
dc.subject.por.fl_str_mv Keggin heteropolycompounds
Heteropolyphosphotungstic acid
Isatin
Ketalization
topic Keggin heteropolycompounds
Heteropolyphosphotungstic acid
Isatin
Ketalization
description Acesso restrito: Texto completo. p. 18-23
publishDate 2008
dc.date.issued.fl_str_mv 2008
dc.date.accessioned.fl_str_mv 2012-05-30T18:40:23Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://www.repositorio.ufba.br/ri/handle/ri/5999
dc.identifier.issn.none.fl_str_mv 1381-1169
dc.identifier.number.pt_BR.fl_str_mv v. 295, n. 1-2
identifier_str_mv 1381-1169
v. 295, n. 1-2
url http://www.repositorio.ufba.br/ri/handle/ri/5999
dc.language.iso.fl_str_mv eng
language eng
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.source.pt_BR.fl_str_mv http://dx.doi.org/10.1016/j.molcata.2008.08.011
dc.source.none.fl_str_mv reponame:Repositório Institucional da UFBA
instname:Universidade Federal da Bahia (UFBA)
instacron:UFBA
instname_str Universidade Federal da Bahia (UFBA)
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institution UFBA
reponame_str Repositório Institucional da UFBA
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