15873-56-0Relevant articles and documents
Cysteine Chemistry in Connection with Abiogenesis
Bridoux, Maxime,Ceccarelli, Cecilia,Shalayel, Ibrahim,Vallée, Yannick,Vazart, Fanny,Youssef-Saliba, Sparta
supporting information, (2020/05/18)
Theoretical and experimental work has been conducted about possible prebiotic syntheses of cysteine. Activated derivatives of this amino acid can oligomerize and polymerize to afford various poly-thiazolines and cysteine-rich chains.
Kinetics and Mechanism of Oxidation of Aliphatic Aldehydes by Pyridinium Hydrobromide Perbromide
Devi, Jai,Kothari, Seema,Banerji, Kalyan K.
, p. 2680 - 2694 (2007/10/02)
Oxidation of six aliphatic aldehydes by pyridinium hydrobromide perbromide (PHPB) in aqueous acetic acid leads to the formation of the corresponding carboxylic acids.The reaction is first order with respect to PHPB.Michaelis-Menten type kinetics were observed with respect to the aldehyde.The formation constants for the aldehyde-PHPB complexes and the rate of their decomposition, at different temperatures, were evaluated.The oxidation of MeCDO exhibited a substantial kinetic isotope effect.The effect of solvent composition indicated that the transition state is morepolar than the reactants.The role of aldehyde in the oxidation process is discussed.A mechanism involving transfer of a hydride ion from the aldehyde hydrate to the oxidant is proposed.