Selective epoxidation of olefins by vanadylporphyrin [VIVO(TPP)] and electron deficient nonplanar β-octabromovanadylporphyrin [VIVO(TPPBr<sub>8</sub>)]
Mannar R. Maurya, Ved Prakash, Muniappan Sankar
Abstract
Meso-tetraphenylporphyrinatooxidovanadium(IV) [V IV O(TPP)] (1) and 2,3,7,8,12,13, 17,18-octabromo-meso-tetraphenylporphyrinatooxidovanadium(IV) [V IV O(TPPBr[Formula: see text]] (2) were synthesized and characterized by various spectroscopic techniques. 1 and 2 were utilized as efficient catalysts for the selective epoxidation of olefins. Catalyst 2 shows very high catalytic activity (TOF = 8783–13108 h[Formula: see text] as compared to 1 (TOF = 2175–3296 h[Formula: see text]. The catalysts are recyclable, as their recyclability was checked for four cycles and show only minor reduction of their efficiency.
Topics & Concepts
CatalysisChemistryIn vivoMedicinal chemistryStereochemistryOrganic chemistryBiotechnologyBiologyPorphyrin and Phthalocyanine ChemistryMetal-Catalyzed Oxygenation MechanismsOxidative Organic Chemistry Reactions