Some 8-substituted derivatives of the protoberberine alkaloids palmatine (1a) and berberine (1b) have been prepared and investigated by 1D and 2D NMR spectroscopy (H-1, C-13, N-15). Complete NMR data for the 8-hydroxy (2), 8-methoxy (3), 8-ethoxy (4), and 8-trichloromethyl (5) 7,8-dihydro derivatives of la and 1b, as well as X-ray data for 8-methoxydihydroberberine (3b), 8-trichloromethyldihydropalmatine (5a), and 8-trichloromethyldihydroberberine (5b), are presented. The physicochemical data for all of these compounds are reviewed and compared with previously published values.
BUZAS; OSOWIECKI; REGNIER, Comptes rendus hebdomadaires des seances de l'Academie des sciences, 1959, vol. 248, # 9, p. 1397 - 1399
作者:BUZAS、OSOWIECKI、REGNIER
DOI:——
日期:——
Synthesis and Cytotoxicity Assessment against Human Colorectal Cancer Cell Lines of Quaternary 8‐Dichloromethyl Protoberberine Alkaloids
Twenty-two quaternary 8-dichloromethylprotoberberine alkaloids were synthesized from unmodified quaternaryprotoberberinealkaloids (QPAs) to improve their physical and chemical properties and to obtain selectively anticancer derivatives. The synthesized derivatives showed more appropriate octanol/water partition coefficients by up to values 3–4 compared to unmodified QPA substrates. In addition, these