crta
Hrvatska znanstvena Sekcija img
bibliografija
3 gif
 Naslovna
 O projektu
 FAQ
 Kontakt
4 gif
Pregledavanje radova
Jednostavno pretraživanje
Napredno pretraživanje
Skupni podaci
Upis novih radova
Upute
Ispravci prijavljenih radova
Ostale bibliografije
Slični projekti
 Bibliografske baze podataka

Pregled bibliografske jedinice broj: 113903

Zbornik radova

Autori: Basarić, Nikola; Marinić, Željko; Šindler-Kulyk, Marija
Naslov: Photochemical transformations of pyrrole-stilbenes
Izvornik: 2nd Mediterranean Meeting on Photochemistry, Book of Abstracts / Favaro, Giovana ; Campagna, Sebastiano (ur.). -
Skup: 2nd Mediterranean Meeting on Photochemistry
Mjesto i datum: Giardini Naxos, Italija, 28. 06.-02. 07. 2003.
Ključne riječi: pyrrole; photochemistry
Sažetak:
In continuation of our interest on photochemistry of heterocyclic compounds we introduced the pyrrole moiety to the beta-position of o-divinylbenzene (1a). The irradiation of pyrrole (1a) gives dimeric products 4 by regiospecific intermolecular addition of the pyrrole to the double bond. No intramolecular formation of a bicyclic product was observed, as we expected on analogy with furan derivatives. We proposed that the formation of dimeric products 4 occurs via photoinduced electron transfer, followed by proton transfer and radical recombination. Gilbert reported similar intermolecular photoaddition of pyrrole to styrene and stilbene. The dipyrrole derivative 2a gives a mixture of stereoisomers 6 in 40 % yield, besides traces of minor intramolecular product 7a. When the 5 position in the dipyrrole 2b is blocked by a methyl group the intramolecular photoproducts 7 and 8 are formed. The irradiation of properly substituted styrylpyrrole (1b) gives bicyclic structure 5a that is transformed into the wanted 5b. Irradiation of 3a gives also the intramolecular bicyclic structure. The identification of the products as well as the mechanism of the reaction will be discussed.
Vrsta sudjelovanja: Predavanje
Vrsta prezentacije u zborniku: Sažetak
Vrsta recenzije: Međunarodna recenzija
Projekt / tema: 0125004, 0098059
Izvorni jezik: ENG
Kategorija: Znanstveni
Znanstvena područja:
Kemija,Biologija



  Verzija za printanje   za tiskati


upomoc
foot_4