Dehydrogenation of (partially) saturated heterocycles provides an important route to heteroaromatic compounds. A heterogeneous cobalt oxide catalyst, previously employed for aerobic oxidation of alcohols and amines, is shown to be effective for aerobic dehydrogenation of various 1,2,3,4-tetrahydroquinolines to the corresponding quinolines. The reactions proceed in good yields under mild conditi...

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...

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...

Sambandam, Nandakumar, Dominique Morabito, Cory Wagg, Brian N. Finck, Daniel P. Kelly, and Gary D. Lopaschuk. Chronic activation of PPAR is detrimental to cardiac recovery after ischemia. Am J Physiol Heart Circ Physiol 290: H87–H95, 2006. First published September 9, 2005; doi:10.1152/ajpheart.00285.2005.— High fatty acid oxidation (FAO) rates contribute to ischemia-reperfusion injury of the m...

Aerobic recycling: A catalytic amount of a hydrazine reagent is sufficient to promote Mitsunobu reactions in the presence of triphenylphosphine, an iron catalyst, and air. The active form of the catalyst, an azo species, can be readily generated by iron-catalyzed aerobic oxidation. MS = molecular sieves, Pc = phthalocyanine.

Two dissimilatory nitrate-reducing (Burkholderia xenovorans LB400 and Xanthobacter sp. str. COX) and two denitrifying isolates (Stappia aggregata IAM 12614 and Bradyrhizobium sp. str. CPP), previously characterized as aerobic CO oxidizers, consumed CO at ecologically relevant levels (<100 ppm) under anaerobic conditions in the presence, but not absence, of nitrate. None of the isolates were abl...

Copper amine oxidases are a family of enzymes with quinone cofactors that oxidize primary amines to aldehydes. The native mechanism proceeds via an iminoquinone intermediate that promotes high selectivity for reactions with primary amines, thereby constraining the scope of potential biomimetic synthetic applications. Here we report a novel bioinspired quinone catalyst system consisting of 1,10-...

The effect of organic phosphates such as inositol hexaphosphate (IHP), ATP, and 2,3-diphosphoglycerate (2,3-DPG) on hemoglobin oxidation by hydroxylamine was studied under aerobic and anaerobic conditions. Under aerobic conditions, the oxidation rate of hemoglobin by hydroxylamine was accelerated as much as about 1.6 times, 1.4 times, and 1.4 times in the presence of IHP, ATP, and 2,3-DPG, resp...

Sambandam, Nandakumar, Dominique Morabito, Cory Wagg, Brian N. Finck, Daniel P. Kelly, and Gary D. Lopaschuk. Chronic activation of PPAR is detrimental to cardiac recovery after ischemia. Am J Physiol Heart Circ Physiol 290: H87–H95, 2006. First published September 9, 2005; doi:10.1152/ajpheart.00285.2005.— High fatty acid oxidation (FAO) rates contribute to ischemia-reperfusion injury of the m...

Background. We have previously shown that increasing myocardial carnitine levels in fatty acidperfused isolated working rat hearts dramatically increases glucose oxidation rates. Since high levels of fatty acids depress reperfusion recovery of ischemic hearts by inhibiting glucose oxidation, we determined what effect carnitine has on glucose oxidation during reperfusion of ischemic hearts. Meth...