Alkaloids ofThalictrum collinum
The method of methanolic extraction was applied to the roots. After the methanol has been distilled off, the concentrated extract was treated with 10% sulfuric acid, the acid extracts were alkalinized to pH 9, and the alkaloids were extracted with ether and chloroform. The combined ether-soluble and chloroform-soluble alkaloids obtained were separated into phenolic and nonphenolic bases. The combined nonphenolic tertiary bases were chromat.graphed on a column of alumina (1:70, neutral, activity grade II). The alkaloids were eluted with benzene, benzene--chloroform, chloroform, ethyl acetate, and ethyl acetate-methanol.
New Flavonoid Glycoside from Thalictrum minus
The new flavonoid diglycoside thamiflaside was isolated from the aerial part of Thalictrum minus. The chemical structure of this glycoside was determined as apigenin 7-O-α-L-2″′-methoxyrhamnopyranosyl-(1→6)-β-D-glucopyranoside based on PMR and 13C NMR (DEPT, HSQC, HMBC) physicochemical methods.
Thalictrum alkaloids—VII
Abstract The following new isoquinoline alkaloids have been isolated from T. fendleri: the bisbenzylisoquinoline thalidezine (IIIb), and the aporphines thaliporphine (XI) and preocoteine (XIV). Thaliporphine has been assigned a structure previously given to glaucentrine. The plant genus Thalictrum has a pronounced tendency to produce isoquinoline alkaloids possessing the trioxygenated moiety XIX.