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Letteratura scientifica selezionata sul tema "Guaiane Sesquiterpenes"

Autore: Grafiati

Pubblicato: 4 giugno 2021

Ultima modifica: 6 settembre 2023

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Articoli di riviste sul tema "Guaiane Sesquiterpenes"

1

Luo, Xiangchao, Rongcui Wu, Xiao Han, et al. "Guaiane sesquiterpenes from the gorgonian Echinogorgia flora collected in the South China Sea." RSC Advances 12, no. 5 (2022): 2662–67. http://dx.doi.org/10.1039/d1ra08631f.

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Abstract (sommario):

Echinoflorine (1), a new dimethylamino-substituted guaipyridine alkaloid with a novel γ-lactone-cyclohepta[c]pyridine fused skeleton, and three new guaiane sesquiterpene lactones, echinofloranolides A–C (2–4), together with eight known guaiane sesquiterpenes were isolated from the gorgonian Echinogorgia flora collected in the South China Sea.

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2

Xu, Houchao, and Jeroen S. Dickschat. "Germacrene B – a central intermediate in sesquiterpene biosynthesis." Beilstein Journal of Organic Chemistry 19 (February 20, 2023): 186–203. http://dx.doi.org/10.3762/bjoc.19.18.

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Abstract (sommario):

Germacranes are important intermediates in the biosynthesis of eudesmane and guaiane sesquiterpenes. After their initial formation from farnesyl diphosphate, these neutral intermediates can become reprotonated for a second cyclisation to reach the bicyclic eudesmane and guaiane skeletons. This review summarises the accumulated knowledge on eudesmane and guaiane sesquiterpene hydrocarbons and alcohols that potentially arise from the achiral sesquiterpene hydrocarbon germacrene B. Not only compounds isolated from natural sources, but also synthetic compounds are dicussed, with the aim to give a

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3

Kuroyanagi, Masanori, Osamu Shirota, Setsuko Sekita, and Takahisa Nakane. "Transannular Cyclization of (4S,5S)-Germacrone-4,5-epoxide into Guaiane and Secoguaiane-type Sesquiterpenes." Natural Product Communications 7, no. 4 (2012): 1934578X1200700. http://dx.doi.org/10.1177/1934578x1200700406.

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Germacrone (1) and ( 4S,5S)-germacrone-4,5-epoxide (2) were isolated, along with guaiane and secoguaiane-type sesquiterpenes, from Curcuma aromatica plants. Compound 2 was derived from 1 and cyclized through transannular (T-A) reactions into various guaiane and secoguaiane-type sesquiterpenes in C. aromatica. The cyclization reaction of 2 was initiated by protonation at an epoxide oxygen atom, followed by cleavage of the epoxide ring and the formation of a C-C bond between C-1 and C-5 to give guaiane-type derivatives. Acidic and thermal treatments of 2 produced twelve sesquiterpenes having gua

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4

Ishihara, Masakazu, Tomoyuki Tsuneya, and Kenji Uneyama. "Guaiane sesquiterpenes from agarwood." Phytochemistry 30, no. 10 (1991): 3343–47. http://dx.doi.org/10.1016/0031-9422(91)83206-z.

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5

Werner, Ingrid, Pavel Mucaji, Armin Presser, and Sabine Glasl. "Sesquiterpenes and Phenolic Compounds from Achillea clypeolata Sesquiterpenes and Phenolic Compounds from Achillea clypeolata." Zeitschrift für Naturforschung B 62, no. 2 (2007): 267–71. http://dx.doi.org/10.1515/znb-2007-0219.

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Abstract (sommario):

The investigation of a dichloromethane extract of flower heads of Achillea clypeolata collected in Bulgaria led to the isolation of one guaiane (4,10,11-trihydroxy-guaiane, 1), four eudesmanes (4(15)-eudesmene-1β ,11-diol, 2, clypeotriol, 3, 3-epi-clypeotriol, 4, cryptomeridiol, 5), one diterpene (sugeroside, 6) and two phenolic compounds (centaureidin, 7 and scopoletin, 8). Their structures were elucidated by UV/vis, EI- and CI-MS as well as by one- and two-dimensional NMR experiments. 4,10,11-Trihydroxy-guaiane (1) and 3-epi-clypeotriol (4) are reported here for the first time.

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6

Miski, Mahmut, Doris H. de Luengo, and Tom J. Mabry. "Guaiane sesquiterpenes from Decachaeta scabrella." Phytochemistry 26, no. 1 (1986): 199–200. http://dx.doi.org/10.1016/s0031-9422(00)81511-3.

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7

Chowdhury, Rasheduzzaman, Choudhury M. Hasan, and Mohammad A. Rashid. "Guaiane sesquiterpenes from Amoora rohituka." Phytochemistry 62, no. 8 (2003): 1213–16. http://dx.doi.org/10.1016/s0031-9422(02)00698-2.

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8

Bruno, Maurizio, Maria C. de la Torre, Benjamín Rodríguez, and Abdallah A. Omar. "Guaiane sesquiterpenes from Teucrium leucocladum." Phytochemistry 34, no. 1 (1993): 245–47. http://dx.doi.org/10.1016/s0031-9422(00)90812-4.

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9

Aati, Hanan Y., Shagufta Perveen, Raha Orfali, et al. "Phytochemical Analysis of Anvillea garcinii Leaves: Identification of Garcinamines F–H and Their Antiproliferative Activities." Plants 10, no. 6 (2021): 1130. http://dx.doi.org/10.3390/plants10061130.

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Abstract (sommario):

Anvillea garcinii is a medicinal plant used in the Arab region for intestinal diseases, lung and liver diseases, digestive problems, and as an antidiabetic agent. Repeated chromatographic purifications of A. garcinii leaves led to the isolation of three undescribed guaiane sesquiterpene derivatives, named garcinamines F–H, characterized by the presence of an amino acid unit, along with five known sesquiterpene lactones (garcinamines B–E and 9β-hydroxyparthenolide). The structures of the new compounds were established using spectroscopic (1D and 2D NMR) and spectrometric methods (ESIMS). Garcin

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10

Li, Yahui, Jingwen Liu, Yingchun Wu, Yiming Li, and Fujiang Guo. "Guaiane-type sesquiterpenes from Curcuma wenyujin." Phytochemistry 198 (June 2022): 113164. http://dx.doi.org/10.1016/j.phytochem.2022.113164.

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Più fonti

Tesi sul tema "Guaiane Sesquiterpenes"

1

Guo, Lei [Verfasser], and Bernd [Akademischer Betreuer] Plietker. "Catalytic enantioselective total synthesis of picrotoxane alkaloids and guaiane sesquiterpene englerins A and B / Lei Guo ; Betreuer: Bernd Plietker." Stuttgart : Universitätsbibliothek der Universität Stuttgart, 2019. http://d-nb.info/1191182754/34.

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2

Pardeshi, Vijendra H. "Enantiospecific Synthesis Of Guaianes And Tricyclic Ring Systems Of Elisabethins And Dumsins." Thesis, 2010. https://etd.iisc.ac.in/handle/2005/1248.

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Abstract (sommario):

One area of natural product synthesis which has been heavily investigated in the last eight decades is the total synthesis of terpenoids. Among terpenoids, the presence of a great deal of stereochemical complexity in combination with a variety of functionalities makes sesquiterpenes challenging targets to the synthetic chemists. As a result synthetic activity in this area continues to flourish. The thesis entitled “Enantiospecific Synthesis of Guaianes and Tricyclic Ring Systems of Elisabethins and Dumsins’’ describes the studies directed towards the synthesis of the guaiane sesquiterpenes and

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3

Pardeshi, Vijendra H. "Enantiospecific Synthesis Of Guaianes And Tricyclic Ring Systems Of Elisabethins And Dumsins." Thesis, 2010. http://etd.iisc.ernet.in/handle/2005/1248.

Testo completo

Abstract (sommario):

One area of natural product synthesis which has been heavily investigated in the last eight decades is the total synthesis of terpenoids. Among terpenoids, the presence of a great deal of stereochemical complexity in combination with a variety of functionalities makes sesquiterpenes challenging targets to the synthetic chemists. As a result synthetic activity in this area continues to flourish. The thesis entitled “Enantiospecific Synthesis of Guaianes and Tricyclic Ring Systems of Elisabethins and Dumsins’’ describes the studies directed towards the synthesis of the guaiane sesquiterpenes and

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4

Mendes, Sofia Alexandra Carreiro. "Study of the anti-inflamatory and antitumoral activities of the fruits of Pittosporum undulatum Vent." Master's thesis, 2012. http://hdl.handle.net/10451/11232.

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Abstract (sommario):

Tese de mestrado, Química Farmacêutica e Terapêutica, Universidade de Lisboa, Faculdade de Farmácia, 2012<br>The main objective of this dissertation was to search for new anti-inflammatory compounds from Pittosporum undulatum (Pittosporacea) fruits, contributing, in this way, to the scientific validation of their use in the traditional medicine of Azores archipelago. In order to achieve this goal, the fruits of Pittosporum undulatum, collected in Terceira Island, were extracted with methanol, and the residue was successively partitioned with nhexane, dichloromethane, ethyl acetate and n-butan

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Rapporti di organizzazioni sul tema "Guaiane Sesquiterpenes"

1

Joel, Daniel M., John C. Steffens, and Alfred M. Mayer. Host-Elicited Germination and Mechanism of Penetration in Broomrape (Orobanche Spp.). United States Department of Agriculture, 1993. http://dx.doi.org/10.32747/1993.7568107.bard.

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Abstract (sommario):

Orobanche is an important parasitic weed. For developing novel methods for its control, a thorough understanding of crucial stages of its development is needed. Therefore, the objectives of this project were characterization of Orobanche germination stimulants, analysis of mechanisms of haustorial penetration, and characterization and isolation of penetration enzymes. The first highly potent natural germination stimulant for Orobanche was isolated from sunflower and identified by high-field 1D (1H and 13C), 2D (1H-1H COSY, HMQC, HMBC)-NMR, GC.FT-IR, and GC.MS as costuslactone, a guaiane type s

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