Efficient catalytic oxidation of primary benzylic CH bonds with molecular oxygen catalyzed by cobalt porphyrins and N-hydroxyphthalimide (NHPI) in supercritical carbon dioxide

Autor:	Wei-Jie Hu, Hongbing Ji, Xiantai Zhou, Mu-Zhao Sun
Jazyk:	angličtina
Rok vydání:	2021
Předmět:	CH bond Supercritical carbon dioxide Process Chemistry and Technology Cobalt porphyrins chemistry.chemical_element General Chemistry Porphyrin Toluene Catalysis chemistry.chemical_compound Chemistry Catalytic oxidation chemistry Polymer chemistry Oxidation Selectivity Cobalt QD1-999 Benzoic acid
Zdroj:	Catalysis Communications, Vol 159, Iss, Pp 106353-(2021)
ISSN:	1873-3905
Popis:	The oxidation of benzylic C H bonds by metalloporphyrins in supercritical carbon dioxide (scCO2) has still limited. Herein, an efficient protocol of aerobic oxidation of primary benzylic C H bond by cobalt porphyrin and NHPI (N-hydroxyphthalimide) in scCO2 was established. Using toluene as model substrate, 21.6% conversion and 81.2% benzoic acid selectivity was obtained under the optimized conditions. The protocol also exhibited good tolerance towards the oxidation of various substrates with different electron property groups. Moreover, a plausible mechanism involving free radical and high-valence cobalt species was proposed.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f52091c737772495177318750398340f http://www.sciencedirect.com/science/article/pii/S1566736721000765 Zobrazit plný text záznamu Full Text from ScienceDirect