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Disproportionation of abietic acid: I. Iodine catalyzed reaction at low temperature
Author(s) -
Ishigami M.,
Yamane K.,
Agawa T.,
Ohshiro Y.,
Ikeda I.
Publication year - 1976
Publication title -
journal of the american oil chemists' society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.512
H-Index - 117
eISSN - 1558-9331
pISSN - 0003-021X
DOI - 10.1007/bf02633308
Subject(s) - disproportionation , chemistry , abietic acid , benzene , iodine , catalysis , mass spectrometry , radical , electron paramagnetic resonance , organic chemistry , resin acid , chromatography , nuclear magnetic resonance , rosin , physics
Disproportionation of abietic acid in the presence of equimolar iodine was carried out in benzene at 60 C, and the reaction products were continuously determined by gas‐liquid chromatography as methyl esters. The major peaks were isolated and characterized by mass, infrared, and nuclear magnetic resonance spectrometry. Four isomers of dihydroabietic acids, dehydroabietic acid, and small amounts of lactones were detected. Electron spin resonance measurement suggested the intermediacy of free radicals.