Biblioteca Digital do Instituto Politécnico de Bragança   Instituto Politécnico de Bragança

Biblioteca Digital do IPB >
Escola Superior Agrária >
Produção e Tecnologia Vegetal >
PTV - Artigos em Revistas Indexados ao ISI >

Please use this identifier to cite or link to this item: http://hdl.handle.net/10198/3932

Título: Synthesis of new hydroxy-2-styrylchromones
Autor: Santos, Clementina M.M.
Silva, Artur
Cavaleiro, José
Palavras-chave: Rearrangements
Cyclizations
Protecting groups
Heterocycles
Issue Date: 2003
Editora: Wiley
Citação: Santos, Clementina; Silva, Artur; Cavaleiro, José (2003) - Synthesis of new hydroxy-2-styrylchromones. European Journal of Organic Chemistry. ISSN 1434-193X. 23, p. 4575-4585
Resumo: Hydroxy-2-styrylchromones 5a−i were prepared by debenzylation of benzyloxy-2-styrylchromones 3a−i, which were synthesised by the Baker−Venkataraman method. The last step of this method, the cyclodehydration 5-aryl-3-hydroxy- 1-(2-hydroxyaryl)-2,4-pentadien-1-ones 2a−i, was carried out with a catalytic amount of iodine, or p-toluenesulfonic acid, in DMSO. Benzyloxy-3-cinnamoyl-2-styrylchromones 4a−f were obtained as by-products in both procedures, but the latter procedure gave benzyloxy-2- styrylchromones 3a−i in better yields. The structures of all new compounds were established by extensive NMR studies.
Descrição: http://apps.isiknowledge.com/full_record.do?product=UA&search_mode=GeneralSearch&qid=5&SID=V1M67gPH3IpI7j5a98j&page=1&doc=1&colname=WOS
Arbitragem científica: yes
URI: http://hdl.handle.net/10198/3932
ISSN: 1434-193X
Versão do Editor: http://onlinelibrary.wiley.com/journal/10.1002/%28ISSN%291099-0690
Appears in Collections:PTV - Artigos em Revistas Indexados ao ISI

Files in This Item:

File Description SizeFormat
Eur JOC, 2003, 4575.pdf208,85 kBAdobe PDFView/Open
Statistics
FacebookTwitterDeliciousLinkedInDiggGoogle BookmarksMySpaceOrkut
Formato BibTex mendeley Endnote Logotipo do DeGóis 

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

 


  © Instituto Politécnico de Bragança - Biblioteca Digital - Feedback - Statistics
  Estamos no RCAAP Governo Português separator Ministério da Educação e Ciência   Fundação para a Ciência e a Tecnologia

Financiado por:

POS_C UE