✦ LIBER ✦

The structure of chamaecynone a novel nor-sesquiterpenoid from chamaecyparisformosensis matsum.

✍ Scribed by Tetsuo Nozoe; Y.S. Cheng; Takashi Toda

Publisher: Elsevier Science
Year: 1966
Tongue: French
Weight: 277 KB
Volume: 7
Category: Article
ISSN: 0040-4039
DOI: 10.1016/s0040-4039(01)99943-5

No coin nor oath required. For personal study only.

✦ Synopsis

A reinvestigation of the terpenoid constituents of the Benihi tree (Chamaecyparis formosensis Matsum., Cupressaceae) (l), grown in Formosa, has resulted in the isolationof a novel nor-sesquiterpenoid, chamaecynone (I), which exists in the non-steroid cis-decalin conformation (A) (2.3). This appears to be the first example of a natural acetylenic compound of terpenoid origin (4). Three other closely related nor-sesquiterpanoids, isochamaecynone (II), hydroxyisochsmaecynone (III) and dihydroisochamaecynone (IV) were also isolated besides some other C,, acetylenic compounds. Chamaecynone (I), colorless prisms, m.p. 92'C, (a)D -93.3' (MeOH).

📜 SIMILAR VOLUMES

The structure of two new acetylenic nor-

The structure of two new acetylenic nor-sesquiterpenoid, dehydrochamaecynenol and dehydrochamaecynenal, isolated from chamaecyparis formosensis matsum.

✍ Toyonobu Asao; Sadao Ibe; Kahei Takase; Y.S. Cheng; Tetsuo Nozoe 📂 Article 📅 1968 🏛 Elsevier Science 🌐 French ⚖ 219 KB

The structures of three novel sesquiterp

The structures of three novel sesquiterpenoids from Valeriana jatamansi Jones

✍ Dong Sheng Ming; De Quan Yu; Yi Ying Yang; Cun Heng He 📂 Article 📅 1997 🏛 Elsevier Science 🌐 French ⚖ 175 KB

Three new muuiinterpm~ds valefiananoids A(I). B(2) and CO), possessing aa unprecedented seaqmtetpene skeleton, have been isolated from the toots and thizames of V~ jatamansi Jones. The s~ we,re elucidated by chemical and specuoscopic mcam and, in the case of 1, confnmed by X-ray crystallography.

ChemInform Abstract: The Structures of T

ChemInform Abstract: The Structures of Three Novel Sesquiterpenoids from Valeriana jatamansi Jones

✍ D. S. MING; D. Q. YU; Y. Y. YANG; C. H. HE 📂 Article 📅 2010 🏛 John Wiley and Sons ⚖ 25 KB 👁 2 views

The Structures of Three Novel Sesquiterpenoids from Valeriana jatamansi Jones -(i.e. valeriananoid A (I), B (IIa), and C (IIb) possessing an unprecedented sesquiterpene skeleton). -(MING, D. S.; YU, D. Q.; YANG,

The structure of abscisterol A: A novel

The structure of abscisterol A: A novel 21-nor-Δ17(20)-unsaturated sterol from Cryptosporiopsis abietina

✍ Hiroshi Yada; Hiroji Sato; Shigeru Kaneko; Akitami Ichihara 📂 Article 📅 1994 🏛 Elsevier Science 🌐 French ⚖ 308 KB

Abstmcrt 'llw tstfucm of absciistaol A (l), isolated fmm C.ubii?rinu. has been daennkd as 21~nur-2d-methylene-5a-cholesta-7,17( 20)-E-die~~~,l9~~xy-3~~1 from a ties of 1D and 2D NMR ex&xdIwtslmdaa~~method.

The structure of rupestrol - a new sesqu

The structure of rupestrol - a new sesquiterpenoid from Verbesina rupestris (urb.) blake

✍ V.G.S. Box; W.R. Chan; D.R. Taylor 📂 Article 📅 1971 🏛 Elsevier Science 🌐 French ⚖ 341 KB

We report here the structural elucidation of a new sesquiterpene, rupestrol, which occurs naturally as its orthocinnamate (1) and cinnamate (2) esters in Verbesina rupestris. Rupestrol orthocinnamate (l), C24H3205, m/e 400 (M+), m.p. 206-207", had a trans-styrene unit [Amex 250 nm (E 22,000), vmax 1

Structure and stereochemistry of mexican

Structure and stereochemistry of mexicanin F, a novel dimeric nor-sesquiterpene lactone from Helenium mexicanum

✍ Alfonso Romo de Vivar; Guillermo Delgado 📂 Article 📅 1985 🏛 Elsevier Science 🌐 French ⚖ 210 KB

The structure and stereochemistry of mexicanin F, a novel dimeric nor-sesquiterpene lactone isolated from He&n&m mexicanum, have been stablish\_ ed from spectral and single-crystal X-ray analyses. Several years ago, one of us reported the physical constants of the mexicanins A, B,..., H which, in ad