Substituted 2,4,4,6-tetraphenyl-4H-selenopyrans: preparation, photocolouration and 4H-selenopyran ring geometry; an X-ray and DFT calculation study
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22340%2F02%3A00006483" target="_blank" >RIV/60461373:22340/02:00006483 - isvavai.cz</a>
Alternative codes found
RIV/60461373:22310/02:00006483
Result on the web
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DOI - Digital Object Identifier
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Alternative languages
Result language
angličtina
Original language name
Substituted 2,4,4,6-tetraphenyl-4H-selenopyrans: preparation, photocolouration and 4H-selenopyran ring geometry; an X-ray and DFT calculation study
Original language description
1,5-Diaryl-3,3-diphenylpentane-1,5-diones 3a-d react with Al2Se3-HCl-AcOH reagent to give the 2,6-diaryl-4,4-diphenyl-4H-selenopyrans 4a-d in satisfactory yields while the same procedure starting from 1,5-diketone 5 affords small amounts of spiroheterocycle 6. 2,4,4,6-Tetraphenyl-4H-selenopyran 4a can be brominated or nitrated at positions 3 and 5 to give substituted derivatives 7-9. Dibromo derivatives 4c and 7 were converted with copper(I) cyanide to dicyano derivatives 4e and 10,11, respectively. Similarly to 4H-pyrans 1 and 4H-thiopyrans 2, the 1-selena analogues 4a-d and 8 exhibit solid state photocolouration which was investigated in terms of dispersive first-order reaction kinetics. The influence of selenium heteroatom on the
Czech name
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Czech description
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Classification
Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
CC - Organic chemistry
OECD FORD branch
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Result continuities
Project
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Continuities
Z - Vyzkumny zamer (s odkazem do CEZ)
Others
Publication year
2002
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Journal Chemical Society, Perkin Transactions 2
ISSN
0300-9580
e-ISSN
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Volume of the periodical
Neuveden
Issue of the periodical within the volume
11
Country of publishing house
GB - UNITED KINGDOM
Number of pages
7
Pages from-to
1909-1916
UT code for WoS article
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EID of the result in the Scopus database
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