Добірка наукової літератури з теми "Diospongin A"
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Статті в журналах з теми "Diospongin A"
Bates, Roderick W., and Ping Song. "Synthesis of diospongin A." Tetrahedron 63, no. 21 (May 2007): 4497–99. http://dx.doi.org/10.1016/j.tet.2007.03.058.
Повний текст джерелаZúñiga, Andrea, Manuel Pérez, Zoila Gándara, Alioune Fall, Generosa Gómez, and Yagamare Fall. "Synthesis of diospongin A, ent-diospongin A and C-5 epimer of diospongin B from tri-O-acetyl-D-glucal." Arkivoc 2015, no. 7 (October 22, 2015): 195–215. http://dx.doi.org/10.3998/ark.5550190.p009.191.
Повний текст джерелаBharath, Yada, Utkal Mani Choudhury, N. Sadhana, and Debendra K. Mohapatra. "The Mukaiyama type aldol reaction for the synthesis of trans-2,6-disubstituted tetrahydropyrans: synthesis of diospongin A and B." Organic & Biomolecular Chemistry 17, no. 41 (2019): 9169–81. http://dx.doi.org/10.1039/c9ob01549c.
Повний текст джерелаVaithegi, Kannan, and Kavirayani R. Prasad. "Total synthesis of (+)-diospongin A." Tetrahedron 76, no. 47 (November 2020): 131625. http://dx.doi.org/10.1016/j.tet.2020.131625.
Повний текст джерелаChandrasekhar, S., T. Shyamsunder, S. Jaya Prakash, A. Prabhakar, and B. Jagadeesh. "First total synthesis of (−)-diospongin B." Tetrahedron Letters 47, no. 1 (January 2006): 47–49. http://dx.doi.org/10.1016/j.tetlet.2005.10.129.
Повний текст джерелаMeruva, Suresh Babu, Ramamohan Mekala, Akula Raghunadh, K. Raghavendra Rao, Vilas H. Dahanukar, T. V. Pratap, U. K. Syam Kumar, and P. K. Dubey. "Synthesis of tetrahedral diarylheptanoid ent-diospongin A and epimer-diospongin B by employing Julia–Kocienski olefination." Tetrahedron Letters 55, no. 34 (August 2014): 4739–41. http://dx.doi.org/10.1016/j.tetlet.2014.06.112.
Повний текст джерелаCossy, Janine, Cyril Bressy, and Florent Allais. "A Short and Efficient Synthesis of (-)-Diospongin A." Synlett 2006, no. 20 (December 2006): 3455–56. http://dx.doi.org/10.1055/s-2006-956485.
Повний текст джерелаHiebel, Marie-Aude, Béatrice Pelotier, and Olivier Piva. "Total synthesis of (+/−)-diospongin A via Prins reaction." Tetrahedron 63, no. 33 (August 2007): 7874–78. http://dx.doi.org/10.1016/j.tet.2007.05.089.
Повний текст джерелаHo, Tse-Lok, Bin Tang, Guohua Ma, and Pengfei Xu. "Concise Synthesis of Yashabushidiol A and (±)-Diospongin A." Journal of the Chinese Chemical Society 59, no. 3 (March 2012): 455–58. http://dx.doi.org/10.1002/jccs.201100664.
Повний текст джерелаMeruva, Suresh Babu, Ramamohan Mekala, Akula Raghunadh, K. Raghavendra Rao, Vilas H. Dahanukar, T. V. Pratap, U. K. Syam Kumar, and P. K. Dubey. "ChemInform Abstract: Synthesis of Tetrahedral Diarylheptanoid ent-Diospongin A (I) and epimer-Diospongin B (II) by Employing Julia-Kocienski Olefination." ChemInform 46, no. 5 (January 15, 2015): no. http://dx.doi.org/10.1002/chin.201505215.
Повний текст джерелаДисертації з теми "Diospongin A"
Raffier, Ludovic. "Application de la réaction de métathèse d'oléfines à l'obtention de molécules d'intérêt biologique." Phd thesis, Université Claude Bernard - Lyon I, 2012. http://tel.archives-ouvertes.fr/tel-00986492.
Повний текст джерелаBrito, Júnior Gilmar Araújo. "Estudo metodológico da reação de Prins em ausência de solventes orgânicos e sua aplicação na síntese de substâncias bioativas." Universidade Federal de São Carlos, 2009. https://repositorio.ufscar.br/handle/ufscar/6457.
Повний текст джерелаFinanciadora de Estudos e Projetos
In this work it was done a methodological study on Prins cyclization reaction in the absence of organic solvents. The synthesis of target compounds was possible by using or the catalytic system pTSA.SiO2(gel) initially developed in this project, as shown in Figure I. As a initial proposal of this work, another catalytics systems were developed, this time using non-protonic Lewis acids. The catalytic system FeCl3.SiO2(aerosil) was shown to be the most advantageous among other catalytic systems developed in parallel experiments. The synthesis of target compounds FLOROL ® (6) and CLARYCET ® (8), in absence of organic solvents, was possible by using this catalytic system. The same catalytic system was employed to the preparation of the skeleton of the compound (+/-)- Diospongin A (Figure II). The developed catalytics systems showed to be effective on the catalysis of Prins cyclization reactions involving oxigenate compounds. But these systems had failed when homoallylics amines were employed and so it XII was not possible to obtain the compounds SS20846 A and pipecolic acid, as shown in Figure III.
Neste trabalho foi feito um estudo metodológico visando à reação de Ciclização de Prins em condições de ausência de solventes orgânicos. Com o sistema catalítico desenvolvido inicialmente (pTSA.SiO2(gel)), foi possível a preparação dos compostos de interesse industrial Florol® e Clarycet®, como mostrado na Figura I. Como proposta inicial do trabalho, outro sistema catalítico foi desenvolvido, desta vez utilizando ácidos de Lewis não protônicos. O sistema catalítico FeCl3.SiO2(aerosil) foi o que mais apresentou vantagens e desta vez, dentre outras substâncias, foi possível novamente a preparação dos compostos de interesse Florol® (6) e Clarycet® (8), em condições de ausência de solventes orgânicos. O mesmo sistema catalítico foi empregado visando a preparação do esqueleto do composto (+/-)-Diospongina A (Figura II) Os sistemas catalíticos desenvolvidos mostraram bons resultados frente à ciclização de Prins com compostos oxigenados. Porém esse sistema falhou frente à mesma reação com aminas homoalílicas, não sendo possível obter os compostos alvos SS20846 A e ácido pipecólico (Figura III)
Hiebel, Marie-Aude. "Accès stéréocontrôlé aux tétrahydropyranes 2,6-disubstitués – Application à la synthèse totale de la diospongine A et du bistramide A." Lyon 1, 2008. http://www.theses.fr/2008LYO10169.
Повний текст джерелаThe aim of this work was first to develop straightforward methodologies to synthesize tetrahydropyrans in order to make libraries of analogues of the C1-C13 fragment of bistramide A (north part). The efficiency of the synthetic approaches was illustrated by the use of sequential tandem processes involving a cross metathesis reaction. By this way, different types of 2,6-disubstituted analogues were obtained by oxa-Michael reaction, SN2’ reaction and haloetherification. Furthermore, the use of the Prins reaction enabled to reach 2,4,6-trisubstituted tetrahydropyrans. In the meantime, these methodologies were applied to the stereoselective synthesis of the north part of bistramide A and to the diastereocontr olled synthesis of diospongin A, another natural product
Lee, Kiyoun. "Stereoselective Syntheses of Tetrahydropyrans: Applications to the Synthesis of (+)-Leucascandrolide A, (+)-Dactylolide and (±)-Diospongin A." Diss., 2012. http://hdl.handle.net/10161/6164.
Повний текст джерелаSubstituted tetrahydropyrans are prevalent in natural products that show interesting biological and pharmacological activities. Therefore, demand for new synthetic approaches for the construction of substituted tetrahydropyrans has recently increased. Specifically, quick and facile access to substrates, excellent stereoselectivity and yield, versatility in substrate scope, and mild reaction conditions compatible with various functional groups are highly desirable characteristics in tetrahydropyran synthesis.
The first part of the dissertation details studies of the tandem and organocatalytic oxa-conjugate addition reactions in conjunction with a dithiane coupling reaction promoted by the
The second part describes the facile and efficient approach to the synthesis of 2,6-cis-4-hydroxy-tetrahydropyrans via a tandem CM/thermal SN2′ reaction. The strategic placement of the hydroxy group at C(4) in the tether resulted in an enhancement of the diastereoselectivity in ring closure. The mildness of the thermal conditions allowed for the synthesis of 2,6-
Dissertation
Vaithegi, K. "Total Synthesis of Natural Products Diospongin a, Cryptofolione, CryptopyranmoscatoneB2, SCH725674 and Towards the Total Synthesis of Palmerolide C." Thesis, 2017. http://etd.iisc.ac.in/handle/2005/4147.
Повний текст джерелаКниги з теми "Diospongin A"
Lee, Kiyoun. Stereoselective Syntheses of Tetrahydropyrans: Applications to the Synthesis of -Leucascandrolide A, -Dactylolide and -Diospongin A. Springer, 2014.
Знайти повний текст джерелаLee, Kiyoun. Stereoselective Syntheses of Tetrahydropyrans: Applications to the Synthesis of -Leucascandrolide a, -Dactylolide and -Diospongin A. Springer London, Limited, 2014.
Знайти повний текст джерелаLee, Kiyoun. Stereoselective Syntheses of Tetrahydropyrans: Applications to the Synthesis of -Leucascandrolide a, -Dactylolide and -Diospongin A. Springer International Publishing AG, 2016.
Знайти повний текст джерела