Chemical degradation products of lignin and humic substances Part II Synthesis, structure verification and liquid chromatographic separation of chlorinated protocatechualdehydes (3,4-dihydroxy-benzaldehydes), 5-hydroxyvanillins (3,4-dihydroxy-5-methoxy-benzaldehydes) and gallaldehydes (3,4,5-trihydroxybenzaldehydes)
作者:J. Hyötyläinen
DOI:10.1016/0045-6535(94)90423-5
日期:1994.5
All possible chloroprotocatechualdehydes, chlorogalladehydes, 5-bromoprotoratechualdehyde and chloro-5-hydroxyvanillins except 2-chloro-5-hydroxyvanillin) were synthesized. Their purity and structures were examined by liquid chromatography, mass spectrometry and other spectroscopic measurements. The details of the synthesis, liquid chromatographic separation and mass spectrometric features are discussed.