Results 211 to 220 of about 2,095 (251)

Cyclized Cembranoids of Natural Occurrence

1992
The structure of eunicillin (89), a carbobicyclic diterpenoid isolated from the Mediterranean gorgonian Eunicella stricta, was reported in 1968 (1). At that time chlorine-containing diterpenoids had been discovered in the gorgonian Briareum asbestinum (2, 3), but it was not until 1977 that the structure of the first briaran, briarein A (211), was ...
I. Wahlberg, A.-M. Eklund
openaire   +2 more sources

Separation, Analysis, and Degradation of Cembranoids in Flue-Cured Tobacco Leaves.

Journal of Separation Science
Cembranoids are significant flavor precursors found in flue-cured tobacco leaves. The degradation products can serve as important aromatic compounds. In this study, 16 cembranoids were discovered in flue-cured tobacco leaves by liquid chromatography-mass
Yue Xie, Kailong Yuan, Junchen Zhu, Yonggang Zhang, Xiaobin Zhang, Hongru Feng, Yuanjiang Pan, Cuirong Sun   +7 more
semanticscholar   +1 more source

ChemInform Abstract: Cembranoid Syntheses

ChemInform, 1988
AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
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Cembranoid diterpenes and a briarane diterpene from corals

Natural Product Research, 2006
Two new cembrane diterpenes (+)-polydactylide (1) and (+)-7alpha,8beta-dihydroxydeepoxysarcophine (2) together with (+)-sarcophine (3) and (+)-sarcophytoxide (4) have been isolated from the soft coral Sinularia polydactyla. The new cembrane diterpene (-)-7beta-hydroxy-8alpha-methoxydeepoxysarcophine (5) has been obtained from the soft coral Sarcophyton
Kamel H. Shaker, Hesham S. M. Soliman, Mohamed Hamza, Daniela Grote, Karlheinz Seifert   +4 more
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Biocatalytic and semisynthetic studies of the anticancer tobacco cembranoids

Expert Opinion on Investigational Drugs, 2007
Historically, tobacco use was primarily recreational and has been smoked in cigarettes, cigars and pipes, as well as smokeless forms of consumption, all of which are associated with adverse health effects. However, recent scientific investigations indicate that tobacco also contains several diverse secondary metabolites that may provide potential ...
Paul W. Sylvester, Khalid A. El Sayed
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Two New Cembranoids from the Soft Coral Sinularia sp. with Antioxidant Activity.

Chemistry and Biodiversity
The chemical investigation of Et2O (Diethyl ether)-soluble partition of the acetone extract of soft coral Sinularia sp. collected off Ximao Island, has led to the isolation and characterization of two new cembranoids (1 and 2), along with one known ...
Weigen Xie, Fei-Fei Gu, Song-Wei Li, Yue-Wei Guo, Yi-Xia Gong, Mingzhi Su   +5 more
semanticscholar   +1 more source

Sarcoroseolides A-D, four undescribed cembranoids from the Red Sea soft coral Sarcophyton roseum

Natural Product Research, 2020
Four undescribed cembranoids, sarcoroseolides A-D (1-4) along with nine reported related cembranoids (5-13) were isolated from the soft coral Sarcophyton roseum.
Mohammed M A Ahmed, M. Albadry, E. Ragab, Elsayed M El-Ghaly, Said K Ismail, Z. Ali, Shabana I. Khan, A. Chittiboyina, I. Khan   +8 more
semanticscholar   +1 more source

Rare Cembranoids from Chinese Soft Coral Sarcophyton ehrenbergi: Structural and Stereochemical Studies.

Journal of Organic Chemistry, 2019
A detailed chemical research of soft coral Sarcophyton ehrenbergi from the South China Sea yielded five new cembranoids 1-5 featuring an α,β-unsaturated-γ-lactone moiety rarely at C-6 to C-19, along with one known related diterpene 6.
Geng Li, Heng Li, Quan Zhang, Min Yang, Yucheng Gu, Lin-Fu Liang, Wei Tang, Yue‐Wei Guo   +7 more
semanticscholar   +1 more source

Cembranoid diterpenes from soft coral Sinularia sp.

China Journal of Chinese Matera Medica, 2010
A soft coral Sinularia sp., collected from the South China Sea, was selected to investigate the bioactive and chemical constituents. The EtOAc fraction were isolated by repeatedly silica gel and Sephadex LH-20 column chromatography to obtain lobophytolide A (1), 3-dehydroxylpresinularolide B (2), sarcophine (3), 3 beta-acetoxyisolobophytolide (4 ...
Rongji Dai, Fang Lv, Xianjie Wang, Yulin Deng   +3 more
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Synthesis and stereochemistry of sarcophytol B: An anticancer cembranoid

Tetrahedron Letters, 1989
Abstract A short (5 step), efficient synthesis of sarcophytol B (1) from farnesal is reported using a low-temperature, titanium-induced pinacol coupling reaction of 1,14-dialdehyde5 as the key step. An X-ray structure determination showed that sarcophytol B has trans diol stereochemistry.
John E. McMurry, You-nan Shih, Joseph G. Rico   +2 more
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