Summary
The CoII complex derived from the unsymmetricalbis-Schiff base ligand, 3-[1-[[2-[[(2-hydroxyphenyl)methylene]-amino]ethyl]amino]ethylidene]-6-methyl-2H-pyran-2,4(3H) dione H2(dha, salen), is a catalyst for the autoxidation of aromatic aldehydes. Under ambient condition Co(dha, salen) catalyses the oxidation ofp-anisaldehyde top-anisic acid in quantitative yield (250 turnovers). The presence of Co(dha, salen) also accelerates the co-oxidation ofp-anisaldehyde and styrene (88 turnovers). In the co-oxidation process, styrene is selectively converted to styrene oxide as the major product.
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Tan, SF., Leung, Ph. & Sin, WC. Catalytic autooxidation ofp-anisaldehyde and styrene by a cobaltbis-schiff base complex. Transition Met Chem 16, 542–545 (1991). https://doi.org/10.1007/BF01024327
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DOI: https://doi.org/10.1007/BF01024327