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The structure of saikogenins A, B, C and D, triterpenoid alcohols of bupleurum falcatum L.

✍ Scribed by Tokuo Kubota; Fumiko Tonami; Hiroshi Hinoh

Publisher: Elsevier Science
Year: 1966
Tongue: French
Weight: 388 KB
Volume: 7
Category: Article
ISSN: 0040-4039
DOI: 10.1016/s0040-4039(00)90250-8

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✦ Synopsis

Most recently, Shibata et al. (1) have reported isolation of saikogenin A, a major sapogenin of the root of Bupleurum falcatum L., and proposed the partial structure (A) for it. The report prompts us to describe our result on triterpenoid sapogenins of the same saurce. Acid hydrolysis of crude saponins afforded, in addition to saikogenin A, three new triterpenoid alcohols, saikogenin B, C and D, and longispinogenin (Xllla) (2). The structure of four saikogenins is shown ta be la, Ila, llla and IVa, respectively, in the present communication. . Crystallization of crude sapogenins from ether gave saikogenin A, C~OH~O,, m.p. 287-293', [a], -43" (EtOH), A,,, 242,251 and 260 mp (c 26,8W,30,400 * Satisfactory analyses were obtained for all compounds described. Unless otherwise stated, rotations were measured in chloroform and U. V. spectra were" taken in ethanol solutions.

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