An elegant approach to quaternary oxindole formation has been developed through a room temperature decarboxylation/radical C-H functionalization by visible-light photoredox catalysis.

An unexpected coupling reaction of arene carboxylic acid with nitroethane via a combination of decarboxylation and dehydrogenation is described. The method provides exclusively (E)-beta-nitrostyrenes.

Ethanol steam reforming (ESR) was investigated on unpromoted and several sodium promoted Pt/ZrO2 catalysts. From DRIFTS experiments, the following steps during ESR were inferred: dissociation of ethanol to produce ethoxy species; oxidative dehydrogenation species acetate; acetate decomposition. Acetate decomposition depends catalyst formulation. Decarboxylation is most favored route at high loa...

Sources of Compounds Tested-Thiamine hydrochloride (Merck, U.S.P. grade), 0-acetylthiamine hydrochloride and oxythiamine dihydrochloride (California Foundation for Biochemical Research), pyrithiamine hydrobromide and 4-amino-5 aminomethyl-a-methyl pyrimidine dihydrochloride (Nutritional Biochemicals Corporation) were all used without further purification. For determination of pK, values, the 4-...

Decarboxylation of fatty acids is an interesting route for the production renewable long-chain hydrocarbons that could replace fossil resources in formulation diesel and jet range fuels. The results reported present work demonstrate Pd supported on hierarchical ZSM-5 zeolite allows decarboxylation different (stearic, oleic, palmitic acids) to proceed under mild operation conditions (T = 250 °C ...

Only three steps are required for the selective synthesis of 2-C-branched glyco-acetic acids from glycals by radical addition and decarboxylation.

The myeloperoxidase (MPO)-mediated decarboxylation of amino acids and the MPO-mediated oxidation of methionine, two potential bactericidal mechanisms, were compared. In the presence of the MPO system (MPO, 50 mU/ml; H(2)O(2), 0.1 mM; Cl(-), 75 mM), 50% of alanine (0.1 mM) was decarboxylated, whereas only 5% of methionine (0.1 mM) was decarboxylated. In contrast, under similar conditions, 80% of...

Lactic acid bacteria play a pivotal role in many food fermentations and sometimes represent a health threat due to the ability of some strains to produce biogenic amines that accumulate in foods and cause trouble following ingestion. These strains carry specific enzymatic systems catalyzing the uptake of amino acid precursors (e.g., ornithine and lysine), the decarboxylation inside the cell, an...