A new Erythrina alkaloid from Erythrina herbacea
Hitoshi Tanaka1, Hisanori Hattori, Toshihiro Tanaka
1Faculty of Pharmacy, Meijo University, Yagoto, Tempaku-ku, Nagoya, 468-8503, Japan. hitoshi@ccmfs.meijo-u.ac.jp
Abstract:
A new Erythrina alkaloid, 10-hydroxy-11-oxoerysotrine (1), has been isolated from the flowers of Erythrina herbacea together with five known compounds: erytharbine (2), 10,11-dioxoerysotrine (3), erythrartine (4), erysotramidine (5) and erysotrine-N-oxide (6). The structure of the new compound was elucidated on the basis of its spectral data, including 2-D NMR and mass (MS) spectra. The new compound is a rare C-10 oxygenated Erythrina alkaloid. The antioxidant activities of the isolated compounds 1-6 were evaluated by scavenging with peroxynitrite.
More Related Videos
Related Concept Videos
Red Algae
Physical Properties of Amines
Adrenergic Agonists: Chemistry and Structure-Activity Relationship
Aromatic ring substitutions: Substituting the aromatic ring with –OH groups at positions 3 and 4 yields catecholamines (e.g., epinephrine), which have a high affinity for adrenoceptors. Hydrogen bonding between –OH groups and receptors enhances adrenergic activity.
Separation of the aromatic...
Preparation of Amines: Reductive Amination of Aldehydes and Ketones


