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Title
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NiFe2O4 as a magnetically recoverable nanocatalyst for odourless C–S bond formation via the cleavage of C–O bond in the presence of S8 under mild and green conditions
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Type
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JournalPaper
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Keywords
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C–O bond activation, C–S bond formation, diaryl sulfides, NiFe2O4 magnetic nanoparticles, S8
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Abstract
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We present green methodologies for one‐pot and odourless syntheses of unsymmetric and symmetric diaryl sulfides via C―O bond activation using NiFe2O4 magnetic nanoparticles as a reusable heterogeneous nanocatalyst. The synthesis of unsymmetric sulfides is performed using the cross‐coupling reaction of phenolic esters such as acetates, triflates and tosylates with arylboronic acid/S8 or triphenyltin chloride/S8 as thiolating agents in the presence of base and NiFe2O4 magnetic nanoparticles as a catalyst in poly(ethylene glycol) as solvent at 60–85°C. Also, the synthesis of symmetric diaryl sulfides from phenolic compounds using S8 as the sulfur source and NiFe2O4 as catalyst in dimethylformamide at 120°C is described. Using these protocols, the syntheses of various unsymmetric and symmetric sulfides become easier than using the available protocols due to the use of a magnetically reusable bimetallic nanocatalyst and avoiding the use of thiols and aryl halides.
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Researchers
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MohamadAli Zolfigol (Fourth Researcher), Abed Rostami (Third Researcher), Amin Rostami (Second Researcher), bahareh atashkar (First Researcher)
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