Naslov
Intramolecular 1, 3-dipolar cycloadditions of the new sydnone derivatives

Autori
Butković, Kristina ; Marinić, Željko ; Šindler-Kulyk, Marija

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
20th International Congress of Heterocyclic Chemistry, Book of Abstracts / - Palermo, 2005, 249-249

Skup
20th International Congress of Heterocyclic Chemistry

Mjesto i datum
Palermo, Italija, 31.07.2005. - 05.08.2005

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
1; 3-dipolar cycloadditions; intermolecular reactions; intramolecular reactions; sydnones; stilbenes; photochemistry; heterocycles

Sažetak
Inter- and intramolecular photochemical [2+2] cycloaddition reactions of o-substituted divinylbenzene with furan and pyrrole rings give various hetero polycyclic compounds (1). The photochemical reaction of the sydnone analogue 1 did not undergo intramolecular cycloaddition (2), but in the presence of acrolein, the intermolecular 1, 3-dipolar cycloaddition products 2 and 3 were isolated. Photochemically induced intramolecular 1, 3-dipolar cycloaddition of 4a and 4b produced the same diazacyclopentalene derivative, as the main product. The thermal intramolecular cycloaddition of 4a and 4b did not give expected two isomeric cycloadducts, but two different products. Identification of the products as well as the reaction mechanism will be discussed.

Izvorni jezik
Engleski

Znanstvena područja
Kemija

POVEZANOST RADA