About: Substituted 2,4,4,6-tetraphenyl-4H-selenopyrans: preparation, photocolouration and 4H-selenopyran ring geometry; an X-ray and DFT calculation study

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About: Substituted 2,4,4,6-tetraphenyl-4H-selenopyrans: preparation, photocolouration and 4H-selenopyran ring geometry; an X-ray and DFT calculation study Goto Sponge NotDistinct Permalink

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
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 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 (en)
Title	Substituted 2,4,4,6-tetraphenyl-4H-selenopyrans: preparation, photocolouration and 4H-selenopyran ring geometry; an X-ray and DFT calculation study Substituted 2,4,4,6-tetraphenyl-4H-selenopyrans: preparation, photocolouration and 4H-selenopyran ring geometry; an X-ray and DFT calculation study (en)
skos:prefLabel	Substituted 2,4,4,6-tetraphenyl-4H-selenopyrans: preparation, photocolouration and 4H-selenopyran ring geometry; an X-ray and DFT calculation study Substituted 2,4,4,6-tetraphenyl-4H-selenopyrans: preparation, photocolouration and 4H-selenopyran ring geometry; an X-ray and DFT calculation study (en)
skos:notation	RIV/60461373:22310/02:00006483!RIV/2004/MSM/223104/N
http://linked.open.../vavai/riv/strany	1909-1916
http://linked.open...avai/riv/aktivita	Z
http://linked.open...avai/riv/aktivity	Z(MSM 223100001)
http://linked.open...iv/cisloPeriodika	11
http://linked.open...vai/riv/dodaniDat	2004
http://linked.open...aciTvurceVysledku	Böhm, Stanislav Kroulík, Jiří Čejka, Jan
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Vysoká škola chemicko-technologická v Praze / Fakulta chemické technologie
http://linked.open...dnocenehoVysledku	665855
http://linked.open...ai/riv/idVysledku	RIV/60461373:22310/02:00006483
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	2,4,4,6-tetraphenyl-4H-selenopyrans (en)
http://linked.open.../riv/klicoveSlovo	2 4 6-tetraphenyl-4H-selenopyrans
http://linked.open...odStatuVydavatele	GB - Spojené království Velké Británie a Severního Irska
http://linked.open...ontrolniKodProRIV	[695339B8DCD1]
http://linked.open...i/riv/nazevZdroje	Journal Chemical Society, Perkin Transactions 2
http://linked.open...in/vavai/riv/obor	CC
http://linked.open...ichTvurcuVysledku	3 (xsd:int)
http://linked.open...cetTvurcuVysledku	6 (xsd:int)
http://linked.open...ocetUcastnikuAkce	0 (xsd:int)
http://linked.open...nichUcastnikuAkce	0 (xsd:int)
http://linked.open...UplatneniVysledku	2002
http://linked.open...v/svazekPeriodika	Neuveden
http://linked.open...iv/tvurceVysledku	Böhm, Stanislav Nešpůrek, Stanislav Čejka, Jan Šebek, Pavel Kroulík, Jiří Koshets, Igor
http://linked.open...n/vavai/riv/zamer	http://linked.opendata.cz/resource/domain/vavai/zamer/MSM%20223100001
issn	0300-9580
number of pages	7 (xsd:int)
http://localhost/t...ganizacniJednotka	22310

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