Naslov
Photocatalytic oxygenation by water-soluble metalloporphyrins as a pathway to functionalized polycycles

Autori
Šagud, Ivana ; Škorić, Irena

Izvornik
International journal of photoenergy (1110-662X) 2018 (2018); 1017957, 8

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, pregledni rad, znanstveni

Ključne riječi
photocatalytic oxygenation ; metalloporphyrins ; benzobicyclo[3.2.1]octadienes ; (benzo)furan derivative ; thiophene derivative

Sažetak
Photocatalytic processes are present in natural biochemical pathways as well as in the organic synthetic ones. This mini-review will cover the field of photocatalysis that uses both the free- base and specially metalated porphyrins as catalysts. Until free-base porphyrins are valuable sensitizers to output singlet oxygen, metalloporphyrins are even more adjustable as photocatalysts because of their coordination capacity, generating a wider range of oxidation reactions. They can be applied in autooxidation reactions, hydroxylations or direct oxygen transfer producing epoxides. This review will focus on how mainly manganese and some iron porphyrins this can be utilized for the functionalization of compounds that have a polycyclic skeleton in their structure. This kind of compounds are notoriously taxing to obtain and difficult to be further functionalized by conventional organic synthetic methods. We have focused on photocatalytic oxygenation reactions in mild conditions, with the use of water soluble porphyrins, as this has been proven as a good tool for these transformations. In these photocatalytic reactions of some polycyclic heteroaromatic compounds new polycyclic epoxides, enediones, ketones, alcohols and/or hydroperoxides are yielded, depending on the catalyst applied. Application of anionic and cationic Mn(III) porphyrins under different reaction parameters results in different reaction pathways generating a vast number of photocatalytic products. Recently, Co- and Ni-complexes have been also photophysically investigated and confirmed as potential photocatalysts for the functionalization of organic substrates.

Izvorni jezik
Engleski

Znanstvena područja
Kemija

POVEZANOST RADA