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Linaridial, a new cis-clerodane-type diterpene dialdehyde, from linaria japonica miq.

✍ Scribed by Isao Kitagawa; Minoru Yoshihara; Tadato Tani; Itiro Yosioka

Book ID: 104213333
Publisher: Elsevier Science
Year: 1975
Tongue: French
Weight: 191 KB
Volume: 16
Category: Article
ISSN: 0040-4039
DOI: 10.1016/s0040-4039(00)71767-9

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✦ Synopsis

Recently we reported the structure elucidation of a new chlorinated iridoid glucoaide named linarioside which was isolated from Linada japoniua Miq.L%rophuZariaceae) 1) . In a continuative study on the constituent8 of the same plant, we have isolated a new diterpene dlaldehyde named linaridial, to which the structure 518 ncm assigned on the basis of the following evidence. Linarldial(2 seems to be the first diterpene possessing a ms-clerodane skeletou elucidated from the scrophulariaceous plants. Dry colmm chromatography(eilica gel) of the ether extractive of fresh subterranean part gave linarldial as an unstable oily substance in a 9 X yield(from the extractive). Linaridial (2, C*0R3002(R 1 + *I, [a], +13°(CRC13), reduces the red tetrazoliux and AgNO3/NR4OIi reagents.

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Linarienone, a new cis-clerodane-type di

Linarienone, a new cis-clerodane-type diterpene from the subterranean part of Linaria japonica Miq.

✍ Isao Kitagawa; Minoru Yoshihara; Toshiyuki Kamigauchi 📂 Article 📅 1977 🏛 Elsevier Science 🌐 French ⚖ 235 KB

During the course of studies on the chemical constituents of Linaria japonica Miq. (unran in Japanese, Scrophulariaceae), we have first elucidated the structure of linarioside (A), 1) which was isolated from the water-soluble portion of epigeous and subterranean parts of the plant and was the first