A general and efficient synthesis of pyrazoles catalyzed by Sc(OTf)3 under solvent-free conditions
| Autor(a) principal: | |
|---|---|
| Data de Publicação: | 2009 |
| Outros Autores: | , , , , |
| Tipo de documento: | Artigo |
| Idioma: | eng |
| Título da fonte: | Journal of the Brazilian Chemical Society (Online) |
| Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532009000200023 |
Resumo: | Pyrazoles were prepared in excellent yields via solventless condensation of various 1,3-diketones (R¹COCHXCOCH3, R¹ = Me, Ph; X = H, Me, Cl) and hydrazines, acylhydrazines or sulfonyl hydrazines in the presence of a catalytic amount of Sc(OTf)3 at room temperature. Additionally, the catalyst could be recovered easily after the reactions and reused without evident loss in activity. |
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A general and efficient synthesis of pyrazoles catalyzed by Sc(OTf)3 under solvent-free conditionsscandium(III) triflatepyrazoles1,3-diketoneshydrazineshydrazidessolvent-freePyrazoles were prepared in excellent yields via solventless condensation of various 1,3-diketones (R¹COCHXCOCH3, R¹ = Me, Ph; X = H, Me, Cl) and hydrazines, acylhydrazines or sulfonyl hydrazines in the presence of a catalytic amount of Sc(OTf)3 at room temperature. Additionally, the catalyst could be recovered easily after the reactions and reused without evident loss in activity.Sociedade Brasileira de Química2009-01-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532009000200023Journal of the Brazilian Chemical Society v.20 n.2 2009reponame:Journal of the Brazilian Chemical Society (Online)instname:Sociedade Brasileira de Química (SBQ)instacron:SBQ10.1590/S0103-50532009000200023info:eu-repo/semantics/openAccessXiong,WeiChen,Jiu-XiLiu,Miao-ChangDing,Jin-ChangWu,Hua-YueSu,Wei-Keeng2009-02-27T00:00:00Zoai:scielo:S0103-50532009000200023Revistahttp://jbcs.sbq.org.brONGhttps://old.scielo.br/oai/scielo-oai.php||office@jbcs.sbq.org.br1678-47900103-5053opendoar:2009-02-27T00:00Journal of the Brazilian Chemical Society (Online) - Sociedade Brasileira de Química (SBQ)false |
| dc.title.none.fl_str_mv |
A general and efficient synthesis of pyrazoles catalyzed by Sc(OTf)3 under solvent-free conditions |
| title |
A general and efficient synthesis of pyrazoles catalyzed by Sc(OTf)3 under solvent-free conditions |
| spellingShingle |
A general and efficient synthesis of pyrazoles catalyzed by Sc(OTf)3 under solvent-free conditions Xiong,Wei scandium(III) triflate pyrazoles 1,3-diketones hydrazines hydrazides solvent-free |
| title_short |
A general and efficient synthesis of pyrazoles catalyzed by Sc(OTf)3 under solvent-free conditions |
| title_full |
A general and efficient synthesis of pyrazoles catalyzed by Sc(OTf)3 under solvent-free conditions |
| title_fullStr |
A general and efficient synthesis of pyrazoles catalyzed by Sc(OTf)3 under solvent-free conditions |
| title_full_unstemmed |
A general and efficient synthesis of pyrazoles catalyzed by Sc(OTf)3 under solvent-free conditions |
| title_sort |
A general and efficient synthesis of pyrazoles catalyzed by Sc(OTf)3 under solvent-free conditions |
| author |
Xiong,Wei |
| author_facet |
Xiong,Wei Chen,Jiu-Xi Liu,Miao-Chang Ding,Jin-Chang Wu,Hua-Yue Su,Wei-Ke |
| author_role |
author |
| author2 |
Chen,Jiu-Xi Liu,Miao-Chang Ding,Jin-Chang Wu,Hua-Yue Su,Wei-Ke |
| author2_role |
author author author author author |
| dc.contributor.author.fl_str_mv |
Xiong,Wei Chen,Jiu-Xi Liu,Miao-Chang Ding,Jin-Chang Wu,Hua-Yue Su,Wei-Ke |
| dc.subject.por.fl_str_mv |
scandium(III) triflate pyrazoles 1,3-diketones hydrazines hydrazides solvent-free |
| topic |
scandium(III) triflate pyrazoles 1,3-diketones hydrazines hydrazides solvent-free |
| description |
Pyrazoles were prepared in excellent yields via solventless condensation of various 1,3-diketones (R¹COCHXCOCH3, R¹ = Me, Ph; X = H, Me, Cl) and hydrazines, acylhydrazines or sulfonyl hydrazines in the presence of a catalytic amount of Sc(OTf)3 at room temperature. Additionally, the catalyst could be recovered easily after the reactions and reused without evident loss in activity. |
| publishDate |
2009 |
| dc.date.none.fl_str_mv |
2009-01-01 |
| dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
| dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
| format |
article |
| status_str |
publishedVersion |
| dc.identifier.uri.fl_str_mv |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532009000200023 |
| url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532009000200023 |
| dc.language.iso.fl_str_mv |
eng |
| language |
eng |
| dc.relation.none.fl_str_mv |
10.1590/S0103-50532009000200023 |
| dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
| eu_rights_str_mv |
openAccess |
| dc.format.none.fl_str_mv |
text/html |
| dc.publisher.none.fl_str_mv |
Sociedade Brasileira de Química |
| publisher.none.fl_str_mv |
Sociedade Brasileira de Química |
| dc.source.none.fl_str_mv |
Journal of the Brazilian Chemical Society v.20 n.2 2009 reponame:Journal of the Brazilian Chemical Society (Online) instname:Sociedade Brasileira de Química (SBQ) instacron:SBQ |
| instname_str |
Sociedade Brasileira de Química (SBQ) |
| instacron_str |
SBQ |
| institution |
SBQ |
| reponame_str |
Journal of the Brazilian Chemical Society (Online) |
| collection |
Journal of the Brazilian Chemical Society (Online) |
| repository.name.fl_str_mv |
Journal of the Brazilian Chemical Society (Online) - Sociedade Brasileira de Química (SBQ) |
| repository.mail.fl_str_mv |
||office@jbcs.sbq.org.br |
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1750318169764921344 |