Chemical transformation of protoberberines. XV. A novel and efficient method for the introduction of alkyl groups on the C-13 position in the protoberberine skeleton.
A novel and efficient synthesis of 13-methylprotoberberine alkaloids
作者:Miyoji Hanaoka、Shuji Yoshida、Chisato Mukai
DOI:10.1039/c39850001257
日期:——
13-Methylberberine (6a), dehydrocorydaline (6b), and corysamine (6c, and their tetrahydro derivatives (9a–c) were efficiently synthesised from the corresponding protoberberines (1) through photochemical electrocyclic reaction of 13-methylene-8, 14-cycloberbines (3).
Photochemical hydroxymethylation of protoberberine alkaloids. Total synthesis of (±)-solidaline
作者:Rafael Suau、Francisco Nájera、Rodrigo Rico
DOI:10.1016/0040-4039(96)00625-9
日期:1996.5
berberinium salts was readily achieved by photoaddition of methanol. The resulting photoproducts were isolated as tetrahydroprotoberberine derivatives. By combining this photochemical reaction with the oxidation of the photoproduct, the synthesis of (±)-solidaline starting from palmatine chloride was accomplished for the first time.
申请人:DALIAN INSTITUTE OF CHEMICAL PYSICS, CHINESE ACADEMY OF SCIENCES
公开号:US20150164870A1
公开(公告)日:2015-06-18
A method of treating nervous system diseases associated with dopamine receptors comprising administering a patent in need a compound having a structure of general formula (I) or a pharmaceutical acceptable salt, hydrate, or solvate thereof in a pharmaceutically effective amount, and a method of making the compound having the structure of general formula (I) or a pharmaceutical acceptable salt, hydrate, or solvate thereof. The compound of formula (I) has multiple pharmacological functions such as the functions of activating opioid receptors and blocking dopamine D2 receptors, and has good physicochemical properties and oral bioavailability. General animal experiments show that such a compound has significant and long-lasting analgesic and calming effects and can be used to treat pain and other mental illnesses.
The reaction of acetoneberberine (I) with methyl iodide was found to give 8, 13a-(2'-oxopropano)-13, 13-dimethylberbine derivative (IV) and 8, 13a-(2'-oxopropano)-13-methylberbine derivative (V) as side products together with the expected 13-methyl-berberinium (II) and berberinium iodide (III). Analogous reaction of I with allyl bromide gave rise to 8, 13a-(2'-oxopropano)-13, 13-diallylberbine derivative (XI). The structures of products were deduced from chemical and spectral data.