57818-83-4Relevant academic research and scientific papers
TETRAKISBORATE AS THE FIRST EFFICIENT NEGATIVELY CHARGED PHASE TRANSFER CATALYST. KINETIC EVIDENCES
Kobayashi, Hiroshi,Sonoda, Takaaki,Iwamoto, Hidetoshi,Yoshimura, Masaji
, p. 579 - 580 (1981)
Remarkable acceleration was observed by use of sodium tetrakisborate as a negatively charged phase transfer catalyst for diazonium ion in the azo coupling reactions of aryl diazonium tetrafluoroborate with a range of diazophile components in liquid-liquid- and liquid-solid two-phase systems.Kinetics of the reactions was examined to confirm the phase transfer catalysis.
Anion-catalyzed Phase-transfer Catalysis. I. Application to Diazo-coupling Reactions
Iwamoto, Hidetoshi,Yoshimura, Masaji,Sonoda, Takaaki,Kobayashi, Hiroshi
, p. 796 - 801 (2007/10/02)
Anion-catalyzed phase-transfer catalysis was evidenced in the diazo-coupling reactions of the arenediazonium ion with a range of diazophile components in liquid-liquid- and liquid-solid two-phase systems.The tetrakisborate ion was effective as an anionic catalyst to accelerate the reactions.Comparisons of the reaction rates in the two-phase system with those in solution systems indicated that the acceleration was due to the increased activity of the cationic reagent, partly by solubilization and partly by the dehydration of such cationic species in the nonpolar organic phase.
