[H2O2 oxidation of 1,4-dihydropyridines over Mg2+ ion exchanged clinoptilolite and solventless solid state acid decomposition of ester to 3,5-pyridinedicarboxylic acid].
The acid property of alkali and alkali earth cation exchanged clinoptiolites were observed by micro-calorimetry of NH(3) adsorption at 200 degrees C. The reaction rates on decomposition of tert-butyl acetate (TBA) over clinoptilolites was proportional to the acid strength. 1,4-Dihydropyridines were oxidized to corresponding Pyridines in high yields at room temperature by H(2)O(2) aqueous solution over Mg(2+) ion exchanged clinoptilolte (CZ-Mg) in acetone. Solventless acid ester decomposition of Di-tert-butyl 3,5-pyridinedicarboxylate to 3,5-Pyridinedicarboxylic acid was effected using CZ-Mg at 170 degrees C.
Department of Applied Chemistry for Environments, Faculty of Engineering and Resource Science, Akita University, Akita, Japan.
Takashi
T
Yamashiro
Kanji
K
Sato
Masayuki
M
Nomura
Shinichi
S
Nakata
D002413:Cations, Divalent; D002625:Chemistry, Organic / Q000379:methods*; D004095:Dihydropyridines / Q000737:chemistry*; D004952:Esters; D006861:Hydrogen Peroxide; D007474:Ion Exchange; D008274:Magnesium; D055601:Organic Chemistry Phenomena; D010084:Oxidation-Reduction; D011725:Pyridines / Q000138:chemical synthesis*; D012997:Solvents; D017641:Zeolites
C546051:3,5-pyridinedicarboxylic acid; D002413:Cations, Divalent; D004095:Dihydropyridines; D004952:Esters; D011725:Pyridines; D012997:Solvents; C083175:clinoptilolite; D017641:Zeolites; C038806:1,4-dihydropyridine; D006861:Hydrogen Peroxide; D008274:Magnesium