Results 201 to 210 of about 1,858 (240)

Cembrane Diterpenes from the Gorgonian Lophogorgia peruana

Journal of Natural Products, 2006
The chemical study of the gorgonian Lophogorgia peruana collected at the Gulf of California has led to the isolation of the new diterpenes lophodienone (2), lophodiol A (3), lophodiol B (4), 17-acetoxylophotoxin (5), 15,16-epoxylophotoxin (6), 17-acetoxy-15,16-epoxylophotoxin (7), and isoepoxylophodione (8), together with the known compounds lophotoxin
M. Carmen Sánchez, María J. Ortega, J. Luis Carballo, Eva Zubía   +3 more
openaire   +3 more sources

New Cembranes from the Soft Coral Sarcophyton Species [PDF]

Journal of Natural Products, 1999
Three new cembranes, including one with a 13-membered carbocyclic ring, have been isolated from the soft coral Sarcophyton sp.
Hiroaki Okamura, Matsumi Doe, Kozo Shibata, Ryozo Nakashima, Munehiro Nakatani, Tetsuo Iwagawa, Keita Takayama   +6 more
openaire   +2 more sources

Nicotabacins A-P, New Cembrane-Type Diterpenes Isolated from Nicotiana tabacum L. and Their Antifungal Activities.

Journal of Agricultural and Food Chemistry
Sixteen previously undescribed cembrane-type diterpenoids, named nicotabacins A-P (1-16), were isolated from Nicotiana tabacum L., together with 12 known analogs (17-28).
Run-Cheng Yan, Luyi Jiang, Ming Hu, Meng-Xia Shen, Ming-Zhu Liu, Ye-Ting Shi, Ruirui Wang, Xing-De Wu, Gan-peng Li   +8 more
semanticscholar   +1 more source

Two cembranes from Cespitularia species (soft coral)

Australian Journal of Chemistry, 1982
Two new cembranolides, (1R,2S,3E,7R,8R,11E,14S)-7,8-epoxy-14-hydroxycembra-3,11,15-trien-17,2-olide and (lR,2R,3E,7R,SR,11E,14R)-7,8-epoxy-14-hydroxycembra-3,11,15-trien-17,2-olide, have been isolated from separate species of Cespitularia (soft coral).
KP Burns, Rymantas Kazlauskas, Robert J. Wells, Peter T. Murphy, Peter Schönholzer   +4 more
openaire   +2 more sources

Cembrane, synthesis. An advanced intermediate for crassin acetate.

Tetrahedron Letters, 1991
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.
Marcus A. Tius, N. Kesavulu Reddy
openaire   +3 more sources

Sarcoglaucins A-I, new antifouling cembrane-type diterpenes from the South China Sea soft coral Sarcophyton glaucum

Organic Chemistry Frontiers, 2019
Nine new cembrane diterpenes, named sarcoglaucins A-I (1–9) along with three known analogues, trochelioid (10), 7α-hydroxy-Δ8(19)-deepoxysarcophine (11), and (−)-sartrochine (12), were isolated from the soft coral Sarcophyton glaucum collected at Xisha ...
Jing Zhang, Xu-li Tang, Xiao Han, Danqing Feng, Xiangchao Luo, L. Ofwegen, Pinglin Li, Guoqiang Li   +7 more
semanticscholar   +1 more source

Oxidative transformations of cembrane diterpenoids. VI. Epoxidation of isocembrol

Chemistry of Natural Compounds, 1983
The stereochemistry of the epoxidation of the diterpene alcohol isocembrol has been studied. The main direction of attack of peracids is the C11 double bond of isocembrol, with the predominant formation of the 11S,12S-epoxide. The ratio of the monoepoxyisocembrols does not change appreciably with a variation in the temperature of the reaction or in the
V. A. Raldugin, V. I. Mamatyuk, N. I. Yaroshenko   +2 more
openaire   +2 more sources

Cembrane Derivatives from Sarcophytum Glaucum

1977
In two previous publications1,2 we described the isolation and structure elucidation of several new cembrane derivatives isolated from the soft coral Sarcophytum lglaucum. The most prominent diterpene, sarcophine (1), which crystallizes from the crude petrol-ether extract and is believed to be one of the fish repellents which protect the coral against ...
openaire   +2 more sources

Single solution phase conformation of new antiproliferative cembranes

Tetrahedron, 1999
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.
Angelo Fontana, Maria Letizia Ciavatta, Pietro Amodeo, Guido Cimino   +3 more
openaire   +7 more sources

Naturally Occurring Cembranes from an Australian Sarcophyton Species

Journal of Natural Products, 2002
Naturally occurring cembranes 1-4 have been isolated from a Sarcophyton sp. These compounds have not previously been found to occur in nature but had been obtained as intermediates in a synthetic modification from tobacco. The absolute stereochemistries of 3 and 4 were determined.
Pham, NB, Butler, MS, Quinn, RJ
openaire   +3 more sources