نتایج جستجو برای: sesquiterpene

تعداد نتایج: 2455  

Journal: :Zeitschrift fur Naturforschung. C, Journal of biosciences 2000
M Todorova B Vogler E Tsankova

The aerial parts of Achillea setacea afforded, in addition of a rare monoterpene triol and 12 known sesquiterpene lactones, a new guaianolide containing an endoperoxide ring. Its structure was elucidated by spectral methods.

Journal: :Organic & biomolecular chemistry 2016
Verónica González Daniel J Grundy Juan A Faraldos Rudolf K Allemann

Despite its distance from the active site the flexible amino-terminal segment (NTS) in the β-domain of the plant sesquiterpene cyclase δ-cadinene synthase (DCS) is essential for active site closure and desolvation events during catalysis.

Journal: :Organic & biomolecular chemistry 2010
Ngoc Duc Tran Martin Albicker Lorenz Schneider Nicolai Cramer

A combination of an enantioselective conjugate addition/trapping sequence and a ruthenium(iii)-catalyzed domino cyclization provides a concise access to benzo[d]xanthenes found in several anti-influenza active sesquiterpene natural products.

Several complications attributed with Herpes virus related infections and the emergence of drug resistant viruses prompt scientists to search for new drugs. Several terpenoids and coumarins have shown anti HSV effects while no sesquiterpene coumarin have been previously tested for HSV treatment. Three sesquiterpene coumarins [badrakemin acetate (1), kellerin (2) and samarcandin diasteromer (3) ...

Journal: :Chemical communications 2001
G Mehta K Sreenivas

A synthetic approach to the tricyclic sesquiterpene sulcatine G, 2, bearing a novel tricyclo[6.2.0.2(2,6)]decane framework, from commercially available 1,5-cod and leading to the first total synthesis of the natural product is described.

Journal: :Molecules 2005
Andrew M Piggott Peter Karuso

A new sesquiterpene, 9-hydroxyfurodysinin-O-ethyl lactone, has been isolated from a New Caledonian Dysidea arenaria, along with three known compounds. The possible incorporation of the ethyl ether from the extraction solvent is discussed.

Journal: :Molecules 2005
Márcia M L de Bodas Maria Rita Marques Adilson Beatriz Dênis P de Lima

Studies aimed at a comparison of chemical, biomimetic (Gif system GoAgg(III))and enzymatic (CHMO) transformations of natural (+)-10beta,14-dihydroxy-allo-aromadendrane have led to preparation of an eight-member sesquiterpene lactone.

Journal: :Zeitschrift fur Naturforschung. C, Journal of biosciences 2002
Jordanka Staneva Milka Todorova Ljuba Evstatieva

Four new eudesmanolides and two new guaianolides were isolated from the aerial parts of Anthemis carpatica Willd. and their structures elucidated by spectral methods. In addition, seven known sesquiterpene lactones were identified.

Journal: :Fitoterapia 2007
Chandra S Mathela Chandan S Chanotiya Shalini Sati Subhash S Sammal Victor Wray

Epoxysesquithujene, a new sesquiterpene epoxide has been characterized in the essential oil of Valeriana hardwickii var. hardwickii on the basis of chemical reactions and extensive NMR data. Fourteen other terpenoids have also been identified on the basis of GC-MS.

Journal: :The Journal of organic chemistry 2001
D F Taber G Bui B Chen

On irradiation in the presence of Fe(CO)(5) under a CO atmosphere, the alkenyl cyclopropane 2 underwent smooth ring expansion to give the sesquiterpene (-)-delobabone 3. The alkenyl cyclopropane 2 was prepared from the enantiomerically enriched epoxide 1.

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