Studies on the Components of Rhodea japonica ROTH. XI. Structure of Rhodeasapogenin. (4).

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概要

• 論文の詳細を見る

• Several years ago the author isolated rhodeasapogenin, a new steroidal sapogenin, from the leaves of Rhodea japonica ROTH. and presumed its structure to be 5β, 22b-spirostane-2β, 3α-diol. In the present work it was found that isorhodeasapogenic acid is identical with tokorogenic acid and that isorhodeasapogenin has a structure of 1β, 3b-dihydroxy-5β, 25D-spirostane. Further, finding that rhodeasapgenin is degradated to methyl 1β, 3β-diacetoxyetiocholanate, the author corrected the previously proposed structure of rhodeasapogenin to 1β, 3β-dihydroxy-5β, 25L-spirostane. The two reactions of isorhodeasapogenin which appeared unusual could be well explained by assigning the above structure to this compound.

• 公益社団法人日本薬学会の論文
• 1958-06-20

著者

• 那波 速男

  Research Laboratories, Takeda Chemical Industries, Ltd.

• 那波 速男

  Research Laboratories Takeda Chemical Industries Ltd.

関連論文

• Synthesis of Polyhydroxysteroids. IV. Syntheses of Pregnanetetrols. (2).
• Synthesis of Polyhydroxysteroids. III. Synthesis of Pregnanetetrols. (1).
• On the Isolation and Structure of Penupogenin
• Synthesis of Polyhydroxysteroids. V. Preparation and Infrared Spectra of 16β, 20α-Isopropylidenedioxysteroids.
• Synthesis of Polyhydroxy-steroids. II. Syntheses of Isomeric 5α-Pregnane-3,5,6,16,20-pentols and Related Compounds.
• Studies on Steroids. XIII. The Structure of Rhodexin-B and-C.
• Studies on the Components of Rhodea japonica ROTH. XI. Structure of Rhodeasapogenin. (4).

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