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Direct and selective oxygenation of C-H bonds to C-O bonds is regarded as an effective and atom-economic tool to generate high-valued products. However, these reactions are still associated with challenges such as harsh reaction conditions, use of expensive transition metal catalysts and use of stoichiometric oxidants. To avoid these, molecular oxygen will be ideal as an oxidant. Additionally, if these reactions can be achieved using metal-free catalysts, should contribute to the green and sustainable movement in chemical synthesis. Based on these, we have summarized recent reports for the C-H bond oxygenation reactions using metal-free catalysts.
This article was published in the following journal.
In this review, we summarize the current state-of-the-art regarding late transition-metal-catalyzed reactions of acyl fluorides, including their synthesis and transformations. In organic reactions, th...
The commercial 9-borabicyclo[3.3.1]nonane dimer is used as the first example of a metal-free catalyst for the monohydroboration of carbodiimides with pinacol borane. Stoichiometric reactions, kinetic ...
A protocol for three-component reactions of cyclic ethers, α-diazo esters, and weak nitrogen, oxygen, carbon, and sulfur nucleophiles (pKa = 2.2-14.8) to afford a variety of structurally complex α-o...
Side-on sulfur monoxide complexes of tantalum, niobium, and vanadium oxyfluorides OMF(η-SO) were prepared via the reactions of metal atoms and SOF upon UV-vis irradiation in a cryogenic matrix. The p...
Hydrogenation of CO2 to formate with H2 in the absence of transition metal is a long-standing great challenge in catalysis. The reactions between tris(pentafluorophenyl)borane (BCF) and K2CO3 (or KHCO...
Earlier studies has shown a correlation between older age and longer time for the rise in the end-tidal O2 concentration during pre-oxygenation. In this study the investigators aim to anal...
The purpose of this study is to evaluate if metal patch testing in metal allergic patients is useful for predicting the development of allergic skin disease or systemic symptoms in patient...
The purpose of this study is to test the hypothesis that decreasing the inspired oxygen concentration during thoracic surgery requiring one lung ventilation will improve post-operative oxy...
The inner retina is crucially dependent on an adequate retinal blood supply. When the retina becomes ischemic and hypoxic this results in severe vision loss due to retinal neovascularizati...
In this randomized crossover trial, preterm infants with intermittent hypoxemia and need for supplemental oxygen will be randomized to either Sequence of two different oxygen target ranges...
Widely distributed enzymes that carry out oxidation-reduction reactions in which one atom of the oxygen molecule is incorporated into the organic substrate; the other oxygen atom is reduced and combined with hydrogen ions to form water. They are also known as monooxygenases or hydroxylases. These reactions require two substrates as reductants for each of the two oxygen atoms. There are different classes of monooxygenases depending on the type of hydrogen-providing cosubstrate (COENZYMES) required in the mixed-function oxidation.
A measure of the ability of a substance, such as a food, to quench oxygen free radicals in vitro.
Enzymes that catalyze the joining of two molecules by the formation of a carbon-oxygen bond. EC 6.1.
Enzymes that catalyze the cleavage of a phosphorus-oxygen bond by means other than hydrolysis or oxidation. EC 4.6.
Enzymes that catalyze the cleavage of a carbon-oxygen bond by means other than hydrolysis or oxidation. EC 4.2.