Reaction of 1,3-dicarbonyl compounds with nitriles: synthesis of pyrazolo [1,5-c] -1,2,4-triazines, pyridines 4H-indeno [1,2-b] pyran derivatives

Several new pyrazolopyridotriazines, pyridines, 4H-pyran and H-indeno [1,2-b] pyran derivatives were prepared from beta-dicarbonyl compounds I, II and the ylidenes III and IV as starting materials

Triterpenes from euphoria retusa

Phytochemical study of the Euphorbia retusa resulted in the isolation and identification of four triterpenes [erythrodiol [I], Uvaol [I], Betulin [II] and 24-methylene-9,19-cyclolanostan-3 beta-yl palmitate [IV]]. The latter was isolated for the first time from this species. Identification of the isolated compounds was established by spectral methods

Constituents of onopordon alexandrine

Constituents of Onopordon alexandrinum were extracted, defatted and analyzed using column chromatography to give taraxasterol [1], lupeol [2], beta-sitosterol [3], stigmasterol [4], scutellarein 4'-methyl ether [5] and takakin [6]. The structure of the hitherto isolated products were inferred by high-field 1H-NMR spectroscopy