Results 21 to 30 of about 207,441 (286)
In pursuit of β-amino α-nitro β-trifluoromethyl ketones: nitro-Mannich vs Mannich-type reactions [PDF]
, 2017 The reactivity of alfa-nitro ketones with trifluoromethyl aldimines is studied for the first time. While under nitro-Mannich conditions only the facial stereoselectivity can be controlled, organocatalysed Mannich-type reactions allowed a complete control
Ballini +45 more
core +1 more source
Green Processing and Synthesis, 2019 Monoaldehydes and dialdehydes are parts of millions of compounds and are extremely versatile intermediates. For the synthesis of monoaldehydes, one impressive approach to date, because of its excellent selectivity, high yield and stability towards over ...
Faisal Muhammad +4 more
doaj +1 more source
Degradation of epoxy coatings under gamma irradiation [PDF]
, 2013 Epoxy networks based on Diglycidyl ether of bisphenol A (DGEBA) and cured with Jeffamines (POPA) or polyamidoamine (PAA) were gamma irradiated at 25 1C in air. Dose rates of 50, 200 or 2000 Gy h- 1 for doses up 100 kGy were used.
DJOUANI, Fatma +4 more
core +6 more sources
e-Polymers, 2007 Abstract Poly(oxy-1,4-phenylene carbonyl-1,4-phenylene oxy-1,4-phenylene carbonyl-2,6-naphthalene carbonyl-1,4-phenylene) or 2,6-PEKEKNK is a polymer of the poly(aryl ether ketone) family differing from PEKEKK by the presence of a naphthyl group linked at positions 2 and 6 to the two ketone groups.
Dosière, Marcel +3 more
openaire +1 more source
Selective oxidation of some primary and secondary benzylic alcohols to the corresponding carbonyl compounds with a Cu(III) complex [PDF]
Journal of the Serbian Chemical Society, 2005 The selective oxidation of benzylic alcohols to the corresponding carbonyl compounds is described. In alkaline solution, the oxidation reagent potassium tetrasodium diperiodatocuprate(III) dodecahydrate (KNa4[Cu(HIO6)2]×12H2O) reacts with primary and ...
VLADAN KOSTIC +2 more
doaj
Influence of temperature, UV-light wavelength and intensity on polypropylene photothermal oxidation [PDF]
, 2014 A criterion based on the energy absorbed by photosensitive species was proposed to describe the contribution of UV-light to the initiation of the polypropylene photothermal oxidation whatever the light source. The calculation of this energy was performed
COLIN, Xavier +3 more
core +4 more sources
Cross-Selectivity in the Catalytic Ketonization of Carboxylic Acids [PDF]
, 2015 A mixture of acetic and 2-methylpropanoic (isobutyric) acids representing non-branched and branched acids, respectively, was catalytically converted to a mixture of ketones in a set of statistically designed experiments (DOE).
Deraddo, Joseph +3 more
core +2 more sources
Oilseeds and fats, crops and lipids, 2018 Optimal brain performance is intimately linked to the brain’s Yin and the Yang − the balance between its structure and its energy metabolism. This relationship is clearly exemplified in infant brain development and in Alzheimer’s disease, and probably ...
Cunnane Stephen C.
doaj +1 more source
Flavoprotein monooxygenases for oxidative biocatalysis: recombinant expression in microbial hosts and applications [PDF]
, 2014 External flavoprotein monooxygenases comprise a group of flavin-dependent oxidoreductases that catalyze the insertion of one atom of molecular oxygen into an organic substrate and the second atom is reduced to water. These enzymes are involved in a great
Bianchi, Dario Alejandro +2 more
core +2 more sources
Alkynes as Synthetic Equivalents of Ketones and Aldehydes: A Hidden Entry into Carbonyl Chemistry
Molecules, 2019 The high energy packed in alkyne functional group makes alkyne reactions highly thermodynamically favorable and generally irreversible. Furthermore, the presence of two orthogonal π-bonds that can be manipulated separately enables flexible synthetic ...
Igor V. Alabugin +4 more
doaj +1 more source