Autoxidation Reaction Mechanism for<scp>L</scp>-Ascorbic Acid-related Compounds in Methanol without Metal Ion Catalysis
作者:Noriko MIYAKE、Tadao KURATA
DOI:10.1271/bbb.62.811
日期:1998.1
The autoxidation mechanism for L-ascorbic acid (ASA)-related compounds such as D-arabo-ascorbic acid (=erythorbic acid; ERA) and triose reductone (TR) in methanol without metal ioncatalysis was studied. The oxidation reaction of these ASA-related compounds seems to proceed via the C(2) oxygen adduct of ERA (or TR) by a similar reactionmechanism to that of ASA.
Oxidation of Triose Reductone by Oxidizing Inorganic Radicals Generated by Pulse Radiolysis
作者:Hideo Horii、Yasuo Abe、Setsuo Taniguchi
DOI:10.1246/bcsj.58.2751
日期:1985.10
Triose reductone (2,3-dihydroxy-2-propenal) was oxidized by Cl2−·, Br2−·, (SCN)2−·, and N3· to produce a triose reductone radical which had an absorption maximum at 398 nm, ε=5500 M−1 cm−1 (1 M=1 mol dm−3) and decayed by second-order kinetics. The rate constants for the reactions of triose reductone with these oxidizing inorganic radicals were obtained. The pKa of this radical was found to be 1.4.
synthesis are discussed. Substitution of the bromo nucleofug in the 2-position of 1,3-dicarbonylcompounds as well as of a 3-oxosulfone by selected sulfur nucleophiles is assumed to follow an SRN1 pathway. Characteristic properties, some typical reactions, and selected derivatives were studied. S-Alkyl- and S-aryl-substituted cyclic 2-thioreductones have been found to be synthons for the preparation of vinylogous