Oxidation of organosulfur compounds using an iron(III) porphyrin complex: An environmentally safe and efficient approach

authors	Pires, SMG; Simoes, MMQ; Santos, ICMS; Rebelo, SLH; Paz, FAA; Neves, MGPMS; Cavaleiro, JAS
nationality	International
journal	APPLIED CATALYSIS B-ENVIRONMENTAL
author keywords	Iron; Porphyrins; Oxidation; Organosulfur compounds; Hydrogen peroxide
keywords	HYDROGEN-PEROXIDE; MANGANESE(III) PORPHYRINS; AMMONIUM ACETATE; DESULFURIZATION; METALLOPORPHYRINS; EPOXIDATION; SULFOXIDES; CHEMISTRY; CATALYSTS; SULFIDES
abstract	Following our approach on the use of metalloporphyrins as catalysts and hydrogen peroxide as oxidant in the oxidation of organosulfur compounds (e.g. sulfides, benzothiophenes and dibenzothiophenes), herein the excellent catalytic performance of a homogeneous iron(III) porphyrin complex is demonstrated. Beyond the better results obtained, when compared with those with manganese(III) complexes, the present procedure involves a cleaner approach because ethanol is used as solvent and a co-catalyst is not required. For all the studied substrates (1-10), conversions higher than 95% were achieved with Fe(TF4NMe2PP)Cl (I). More significantly, catalyst (I) is also efficient in the oxidation of a model fuel, constituted by a mixture of benzothiophene (3), 3-methylbenzothiophene (5), 4-methyldibenzothiophene (8) and 4,6-diethyldibenzothiophene (10) in hexane, affording an overall conversion of 84%. (C) 2014 Elsevier B.V. All rights reserved.
publisher	ELSEVIER SCIENCE BV
issn	0926-3373
year published	2014
volume	160
beginning page	80
ending page	88
digital object identifier (doi)	10.1016/j.apcatb.2014.05.003
web of science category	Chemistry, Physical; Engineering, Environmental; Engineering, Chemical
subject category	Chemistry; Engineering
unique article identifier	WOS:000340687900009