Aerobic oxidation
نویسندگان
چکیده
منابع مشابه
Electrosynthesis: A New Frontier in Aerobic Oxidation?
The formation of alcohols and carbonyl derivatives via oxidation of the corresponding Csp–H bonds is crucial to the chemical community. Historically chemists have relied for these transformations on the use of organic or inorganic oxidants, which are often toxic and produce stoichiometric amounts of harmful waste. As we strive for a more sustainable fine chemicals synthesis, for which typically...
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Selective oxidation reactions are challenging when carried out on an industrial scale. Many traditional methods are undesirable from an environmental or safety point of view. There is a need to develop sustainable catalytic approaches that use molecular oxygen as the terminal oxidant. This review will discuss the use of stable radicals (primarily nitroxyl radicals) in aerobic oxidation catalysi...
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Homogeneous Cu/TEMPO catalyst systems (TEMPO = 2,2,6,6-tetramethylpiperidine-N-oxyl) have emerged as some of the most versatile and practical catalysts for aerobic alcohol oxidation. Recently, we disclosed a (bpy)Cu(I)/TEMPO/NMI catalyst system (NMI = N-methylimidazole) that exhibits fast rates and high selectivities, even with unactivated aliphatic alcohols. Here, we present a mechanistic inve...
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This publication describes a highly selective oxidation of aldehydes to the corresponding acids or esters. The reaction proceeds under metal-free conditions by using N-heterocyclic carbenes as organocatalysts in combination with environmentally friendly oxygen as the terminal oxidation agent.
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An efficient organocatalytic method for chemoselective aerobic oxidation of secondary benzylic alcohols within lignin model compounds has been identified. Extension to selective oxidation in natural lignins has also been demonstrated. The optimal catalyst system consists of 4-acetamido-TEMPO (5 mol %; TEMPO = 2,2,6,6-tetramethylpiperidine-N-oxyl) in combination with HNO3 and HCl (10 mol % each)...
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ژورنال
عنوان ژورنال: Nature Materials
سال: 2013
ISSN: 1476-1122,1476-4660
DOI: 10.1038/nmat3803