Utilize este identificador para referenciar este registo:
https://hdl.handle.net/1822/2200
Registo completo
Campo DC | Valor | Idioma |
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dc.contributor.author | Queiroz, Maria João R. P. | - |
dc.contributor.author | Plasencia, Paula M. S. | - |
dc.contributor.author | Dubest, Roger | - |
dc.contributor.author | Aubard, Jean | - |
dc.contributor.author | Guglielmetti, Robert J. | - |
dc.date.accessioned | 2005-06-15T09:56:35Z | - |
dc.date.available | 2005-06-15T09:56:35Z | - |
dc.date.issued | 2003 | - |
dc.identifier.citation | "Tetrahedron". 59 (2003) 2567-2573. | eng |
dc.identifier.issn | 0040-4020 | por |
dc.identifier.uri | https://hdl.handle.net/1822/2200 | - |
dc.description.abstract | New methyl induced linear and angular thieno-2H-chromenes 4, 5 and 6 were prepared by reaction of new methylated 6-hydroxybenzo[b]thiophenes 2 (a, b and c) and propargylic alcohols 3a and 3b, using acidic Alumina Brockmann I as catalyst and drying agent. Compounds 2 were prepared in good to excellent yields in a “one pot” three step reaction from the corresponding bromo compounds 1. The photochromic behaviour of compounds 4, 5 and 6b was evaluated with the aid of a classical set of spectrokinetic parameters, and compared to reference compounds that are benzoannellated in the 5,6 and 6,7 positions of the chromene (naphthopyrans) and also to thieno-2H-chromenes 7 and 8, previously prepared, which are analogues of 5a. The resistance to fatigue (photodegradation) under continuous irradiation was also evaluated. | eng |
dc.description.sponsorship | Fundação para a Ciência e Tecnologia. Escola Superior de Tecnologia e Gestão do Instituto Politécnico de Bragança. | por |
dc.language.iso | eng | eng |
dc.publisher | Elsevier 1 | eng |
dc.rights | openAccess | eng |
dc.subject | Thieno-2H-chromenes | eng |
dc.subject | Hydroxybenzo[b]thiophenes | eng |
dc.subject | Photochromism | eng |
dc.subject | Flash photolysis | eng |
dc.title | Synthesis and photochromic behaviour of new methyl induced linear and angular thieno-2H-chromenes | eng |
dc.type | article | eng |
dc.peerreviewed | yes | eng |
oaire.citationStartPage | 2567 | por |
oaire.citationEndPage | 2573 | por |
oaire.citationIssue | 14 | por |
oaire.citationVolume | 59 | por |
dc.identifier.doi | 10.1016/S0040-4020(03)00262-X | por |
dc.subject.wos | Science & Technology | por |
sdum.journal | Tetrahedron | por |
Aparece nas coleções: | CDQuim - Artigos (Papers) |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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TET5461.pdf | 149,04 kB | Adobe PDF | Ver/Abrir |