Journal
ADVANCED SYNTHESIS & CATALYSIS
Volume 355, Issue 13, Pages 2591-2603Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adsc.201300275
Keywords
homogeneous catalysis; manganese; oxidation; peroxides; triazacyclononane
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Funding
- Netherlands Organisation for Scientific Research (VIDI) [700.57.428]
- European Research Council [279549]
- University of Groningen
- Erasmus
- NRSC-C
- Foundation for Technology and Science [11059]
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The manganese-containing catalytic system [(Mn2O3)-O-IV,IV(tmtacn)(2)](2+) (1)/carboxylic acid (where tmtacn=N,N,N-trimethyl-1,4,7-triazacyclononane), initially identified for the cis-dihydroxylation and epoxidation of alkenes, is applied for a wide range of oxidative transformations, including oxidation of alkanes, alcohols and aldehydes employing H2O2 as oxidant. The substrate classes examined include primary and secondary aliphatic and aromatic alcohols, aldehydes, and alkenes. The emphasis is not primarily on identifying optimum conditions for each individual substrate, but understanding the various factors that affect the reactivity of the Mn-tmtacn catalytic system and to explore which functional groups are oxidised preferentially. This catalytic system, of which the reactivity can be tuned by variation of the carboxylato ligands of the in situ formed [Mn-2(III,III)(O)(RCO2)(2)(tmtacn)(2)](2+) dimers, employs H2O2 in a highly atom efficient manner. In addition, several substrates containing more than one oxidation sensitive group could be oxidised selectively, in certain cases even in the absence of protecting groups.
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