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)
摘要:
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.
Benzodioxole derivatives and processes for preparing the same
申请人:TANABE SEIYAKU CO., LTD.
公开号:EP0329326A1
公开(公告)日:1989-08-23
Novel benzodioxole derivative of the formula:
wherein R¹ is a lower alkyl group, a lower alkoxy-lower alkyl group, phenyl group or pyridyl group, R² is hydrogen atom or a halogen atom and R³ is hydrogen atom or a lower alkyl group, and a salt thereof are disclosed.
Said derivative (I) and a salt thereof have potent diuretic, saluretic and uricosuric activities.
Benzodioxole derivatives, pharmaceutical compositions and use
申请人:Tanabe Seiyaku Co., Ltd.
公开号:US04965282A1
公开(公告)日:1990-10-23
Novel benzodioxole derivative of the formula: ##STR1## wherein R.sup.1 is a lower alkyl group, a lower alkoxy-lower alkyl group, phenyl group or pyridyl group, R.sup.2 is hydrogen atom or a halogen atom and R.sup.3 is hydrogen atom or a lower alkyl group, and a salt thereof are disclosed. Said derivative (I) and a salt thereof have potent diuretic, saluretic and uricosuric activities.
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.