Results 91 to 100 of about 479 (139)

Lycopodium alkaloids—VII

Tetrahedron, 1962
Abstract Lycofoline and its naturally occurring acetyl derivatives have been correlated to acrifoline. The structures and sterochemistry of these bases is discussed.
R.H. Burnell, D.R. Taylor
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Lycopodium alkaloids from Huperzia serrata

Fitoterapia, 2019
Five new Lycopodium alkaloids, huperzine Y1 (1), huperzine Y2 (2), huperzine Y3 (3), (+)-huperzine Z (4a) and (-)-huperzine Z (4b) as well as ten known alkaloids (5-14) were isolated from Huperzia serrata. The structures of the new compounds were established using extensive spectroscopic (1D and 2D NMR, IR, and HRESIMS) and calculated electronic ...
Fangfang, Jiang, Bowen, Qi, Ning, Ding, Hongyun, Yang, Fangfang, Jia, Yuan, Luo, Juan, Wang, Xiao, Liu, Xiaohui, Wang, Pengfei, Tu, Shepo, Shi   +10 more
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Casuarines A and B, Lycopodium alkaloids from Lycopodium casuarinoides

Tetrahedron Letters, 2013
A phytochemical study on Lycopodium casuarinoides has led to the isolation of two new C16N2-type Lycopodium alkaloids, casuarine A (1), a cage-like structure featured with a fused 6/6/6/6/6 pentacyclic ring system, and casuarine B (2). Their structures were elucidated based on the spectroscopic data and further confirmed by X-ray analysis.
Fei Liu, Xing-De Wu, Juan He, Xu Deng, Li-Yan Peng, Huai-Rong Luo, Qin-Shi Zhao   +6 more
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Structure and Stereochemistry of the Lycopodium Alkaloids

1962
The investigation of Lycopodium alkaloids has a very long history (20). In spite of the fact that the first Lycopodium alkaloid was isolated in the year 1881, and that the number of compounds shown to be present in various Lycopodium spp. has increased steadily since, no progress in the structure elucidation of this interesting class was achieved until
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ChemInform Abstract: A NEW TYPE OF LYCOPODIUM ALKALOID. THE C30N3 ALKALOIDS FROM LYCOPODIUM LUCIDULUM

Chemischer Informationsdienst, 1979
AbstractDie Strukturen von Lucidin B (I), Dihydrolycolucin (IV) und Lycolucin (V), die einen neuen Typ von Lycopodium‐Alkaloiden repräsentieren, werden hauptsächlich auf der Grundlage der röntgenkristallographischen Untersuchungen des aus (I) über (II) und (IIIa) wie aufgezeigt erhaltenen, kristallinen Derivats (IIIb) sowie anhand von IR‐ und NMR ...
W. A. AYER, L. M. BROWNE, Y. NAKAHARA, M. TORI, L. T. J. DELBAERE   +4 more
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ChemInform Abstract: ALKALOIDS OF LYCOPODIUM GNIDIOIDES AND LYCOPODIUM VERTICILLATUM

Chemischer Informationsdienst, 1977
AbstractNeben den bereits bekannten Alkaloiden Lucidiolin, Anhydrolycodolin, Lycoclavin und Selagin werden aus Lycopodium gnidioides L. f. die neuen Verbindungen Gnidioidin (I) und Lycognidin (II) isoliert.
L. NYEMBO, N. KAHINDO, J. C. BRAEKMAN, C. HOOTELE   +3 more
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Lycopodium Alkaloids: Isolation and Asymmetric Synthesis

2011
Lycopodium alkaloids have attracted the attention of many natural product chemists and synthetic organic chemists due to their important biological activities and unique skeletal characteristics. In this review we describe isolation and asymmetric syntheses of several new alkaloids such as lycoposerramines-C, -V, -W, and cernuine, and show that ...
Mariko, Kitajima, Hiromitsu, Takayama
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ChemInform Abstract: The Lycopodium Alkaloids

ChemInform, 2009
AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 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.
Yusuke Hirasawa, Jun'ichi Kobayashi, Hiroshi Morita   +2 more
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The Chemistry and Biology of Lycopodium Alkaloids

Chemistry & Biodiversity
AbstractLycopodiales, an order comprising 388 distinct species, is the source of Lycopodium alkaloids (LAs), a group of naturally occurring alkaloids that share a common biosynthesis and structural attributes. These remarkable organisms are considered vestiges of ancient ferns, with fossil evidence dating their existence back to an impressive 300 ...
Zhi‐Jun Zhang, Shuai Jiang, Qin‐Shi Zhao   +2 more
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LYCOPODIUM ALKALOIDS: IV. THE CONSTITUTION AND STEREOCHEMISTRY OF LYCOCLAVINE, AN ALKALOID OF LYCOPODIUM CLAVATUM VAR. MEGASTACHYON

Canadian Journal of Chemistry, 1962
The alkaloids of Lycopodium clavatum var. megastachyon have been examined and two hitherto unreported alkaloids, lycoclavine and acetyllycoclavine, were isolated and their structures determined. The nuclear magnetic resonance spectra of these and related compounds are discussed in terms of the conformation of ring B in these alkaloids.
W. A. Ayer, D. A. Law
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