Possible Metabolic Intermediates from IAA toβ-Acid in Rice Bran

Isolation and Structure of a New Vitamin B6 Conjugate in Rice Bran

“…DA, dextrorotatory in methanol (MeOH) at 589 nm, was identified as (+)-5-hydroxy-dioxindole-3-acetic acid. The UV, EIMS and IR spectra of DA agreed with those reported by Kinashi et al (1976) The results of the Gibbs reaction showed DA was attached through an ester bond to the sugar moiety of PNC. In the 'H NMR spectrum of PNX, the signals at 3.72 (lH, dd, J = 4 and 12 Hz) and 3.90 (lH, dd, J=2 and 12 Hz) assignable to Hz-12 or HZ-18 were observed at lower field than other sugarprotons.…”

Analysis of [14C] indole‐3‐acetic acid metabolites from the primary roots of Zea mays seedlings using reverse‐phase high‐performance liquid chromatography

“…They obtained no evidence for the decarboxylation of a substantial amount of IAA in vivo. Kinashi et al (1976) also extracted the methyl esters of oxindole-3-acetic acid and other related compounds from rice bran.…”

Oxidative Reaction of Oxindole-3-acetic Acids

“…The antioxidative mechanisms of indole compounds were also studied, and the reaction often occurred at the C-3 position via the 2,3-double bond. 6,13) However oxindoles lost the conjugated double bond, and as we were interested in the reactions of 2 in oxidative conditions, we then examined the oxidation of oxIAA methyl ester (4) 14) to avoid the reaction derived from the free carboxylic acid.…”