Artículos de revistas sobre el tema "Synthetic studies"

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1

Ackermann, Stefanie, Hans-Georg Lerchen, Dieter Häbich, Angelika Ullrich y Uli Kazmaier. "Synthetic studies towards bottromycin". Beilstein Journal of Organic Chemistry 8 (1 de octubre de 2012): 1652–56. http://dx.doi.org/10.3762/bjoc.8.189.

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Thio-Ugi reactions are described as an excellent synthetic tool for the synthesis of sterically highly hindered endothiopeptides. S-Methylation and subsequent amidine formation can be carried out in an inter- as well as in an intramolecular fashion. The intramolecular approach allows the synthesis of the bottromycin ring system in a straightforward manner.
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2

Brimble, Margaret A. "Synthetic studies toward pyranonaphthoquinone antibiotics". Pure and Applied Chemistry 72, n.º 9 (1 de enero de 2000): 1635–39. http://dx.doi.org/10.1351/pac200072091635.

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A furofuran annulation/oxidative rearrangement strategy was used to construct the basic skeleton of the pyranonaphthoquinone family of antibiotics. This synthetic methodology has been applied to the synthesis of the spiroacetal-containing pyranonaphthoquinone antibiotic griseusin A, to an analog of the C-glycoside medermycin, and to a dimeric pyranonaphthoquinone.
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3

Shawe, Thomas T. y Liebeskind Lanny S. "Saframycin synthetic studies". Tetrahedron 47, n.º 30 (julio de 1991): 5643–66. http://dx.doi.org/10.1016/s0040-4020(01)86518-2.

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4

Smith, Amos B., Jason J. Chruma, Qiang Han y Joseph Barbosa. "Complestatin synthetic studies". Bioorganic & Medicinal Chemistry Letters 14, n.º 7 (abril de 2004): 1697–702. http://dx.doi.org/10.1016/j.bmcl.2004.01.056.

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5

Fernandes, Carla, Maria Carraro, João Ribeiro, Joana Araújo, Maria Tiritan y Madalena Pinto. "Synthetic Chiral Derivatives of Xanthones: Biological Activities and Enantioselectivity Studies". Molecules 24, n.º 4 (22 de febrero de 2019): 791. http://dx.doi.org/10.3390/molecules24040791.

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Many naturally occurring xanthones are chiral and present a wide range of biological and pharmacological activities. Some of them have been exhaustively studied and subsequently, obtained by synthesis. In order to obtain libraries of compounds for structure activity relationship (SAR) studies as well as to improve the biological activity, new bioactive analogues and derivatives inspired in natural prototypes were synthetized. Bioactive natural xanthones compromise a large structural multiplicity of compounds, including a diversity of chiral derivatives. Thus, recently an exponential interest in synthetic chiral derivatives of xanthones (CDXs) has been witnessed. The synthetic methodologies can afford structures that otherwise could not be reached within the natural products for biological activity and SAR studies. Another reason that justifies this trend is that both enantiomers can be obtained by using appropriate synthetic pathways, allowing the possibility to perform enantioselectivity studies. In this work, a literature review of synthetic CDXs is presented. The structures, the approaches used for their synthesis and the biological activities are described, emphasizing the enantioselectivity studies.
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6

Koch-Müller, Monika, Irmgard Abs-Wurmbach, Klaus Langer, Cuff Shaw, Richard Wirth y Matthias Gottschalk. "Synthetic and natural Fe-Mg chloritoid: structural, spectroscopic and thermodynamic studies". European Journal of Mineralogy 12, n.º 2 (29 de marzo de 2000): 293–314. http://dx.doi.org/10.1127/ejm/12/2/0293.

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7

Klein, Larry L. "Synthetic studies toward verrucosidin: Synthesis of (±)verrucosal". Tetrahedron Letters 27, n.º 38 (1986): 4545–48. http://dx.doi.org/10.1016/s0040-4039(00)84999-0.

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8

Clezy, PS. "Studies in Porphyrin Chemistry: A Synthetic Approach". Australian Journal of Chemistry 44, n.º 9 (1991): 1163. http://dx.doi.org/10.1071/ch9911163.

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This review summarizes porphyrin synthesis in the author's laboratory, and deals mainly with the preparation of porphyrins substituted with electron-withdrawing groups. Oxidative cyclization of 1,19-dimethylbilenes-b has provided the most successful avenue to porphyrins of this class, and the procedure works best when the terminal rings of the bilene -b are substituted with electron-withdrawing groups. This methodology has yielded a wide range of porphyrins carrying this class of substituent on adjacent pyrrolic rings, and has led to the preparation of many biologically important molecules including porphyrin a and the chlorophylls c1 and c2. Also described are the necessary modifications which are required to adapt the general strategy to the synthesis of porphyrins carrying electron-withdrawing groups on opposite pyrrolic rings as well as for cases where only one such substituent occurs. All these procedures were designed specifically to handle the preparation of porphyrins which were unsymmetrically substituted. However, some biologically significant members of the porphyrin series have a symmetrical arrangement of substituents in part of the molecule, and an adaption of the general synthetic procedure allows advantage to be taken of this substitution pattern. A mechanistic study of the oxidative cyclization of bilenes -b, which has been the reaction central in all the above synthetic endeavours, has produced a broad understanding of the manner in which the cyclization proceeds. Very recent studies involving the synthesis of petroporphyrins, besides consolidating the structure of many of these compounds, have provided sufficient material to allow an investigation of the properties of these porphyrins to commence, and in some cases this had led to a clearer understanding of their orgin.
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9

Kawsar, Sarkar, Jannatul Ferdous, Golam Mostafa y Mohammad Manchur. "A Synthetic Approach of D-Glucose Derivatives: Spectral Characterization and Antimicrobial Studies". Chemistry & Chemical Technology 8, n.º 1 (15 de marzo de 2014): 19–27. http://dx.doi.org/10.23939/chcht08.01.019.

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10

Basso, R., R. Cabella, G. Lucchetti, P. Marescotti y A. Martinelli. "Structural studies on synthetic and natural Fe-Sb-oxides of MO2 type". Neues Jahrbuch für Mineralogie - Monatshefte 2003, n.º 9 (14 de septiembre de 2003): 407–20. http://dx.doi.org/10.1127/0028-3649/2003/2003-0407.

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11

Qiu, Yuanyou, Jiaxin Zhong, Shan Du y Shuanhu Gao. "Synthetic studies on daphniglaucins". Chemical Communications 54, n.º 44 (2018): 5554–57. http://dx.doi.org/10.1039/c8cc03063d.

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12

Ferjancic, Zorana, Radomir Matovic y Radomir Saicic. "Synthetic studies towards d-modified paclitaxel analogues". Journal of the Serbian Chemical Society 77, n.º 11 (2012): 1529–39. http://dx.doi.org/10.2298/jsc120626094f.

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A synthetic sequence has been developed for the preparation of 9,10-O-diacetyl-4-desmethylene-4?-(3-butenyl)-4?-hydroxy-5-O-mesyltaxicin I-1,2-carbonate 3, an intermediate in the attempted synthesis of cyclobutane paclitaxel analogue. A series of reactions of 3 has been investigated, including the protection of sterically hindered C-4? hydroxy group and oxidative cleavage of the terminal double bond. Cyclization of 13 to the cyclobutane-containing intermediate failed due to unexpected instability of the DMS protecting group under basic conditions.
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13

Kita, Yasuyuki y Masayuki Kirihara. "Synthetic Studies on Heteroanthracyclines". HETEROCYCLES 46, n.º 1 (1997): 705. http://dx.doi.org/10.3987/rev-97-sr3.

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14

Takami, Hitoshi, Hirokazu Koshimura y Toshiaki Kumazawa. "Synthetic Studies on Trifluoroacetylindoles". HETEROCYCLES 51, n.º 5 (1999): 1119. http://dx.doi.org/10.3987/com-99-8480.

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15

TANAKA, Toshio y Seizi KUROZUMI. "Synthetic Studies of Isocarbacyclins." Journal of Synthetic Organic Chemistry, Japan 50, n.º 2 (1992): 143–59. http://dx.doi.org/10.5059/yukigoseikyokaishi.50.143.

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16

TOKOROYAMA, Takashi. "Synthetic Studies on Limonoids." Journal of Synthetic Organic Chemistry, Japan 56, n.º 12 (1998): 1014–25. http://dx.doi.org/10.5059/yukigoseikyokaishi.56.1014.

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17

Hara, Hiroshi, Kenta Hayashi, Shoko Inoue, Hanae Shimizu, Akiko Kobayashi, Miyuki Ishizaki, Yutaka Matsuoka y Kiyoshi Nishitani. "Synthetic Studies on Azacyclotribenzylenes". HETEROCYCLES 65, n.º 1 (2005): 1. http://dx.doi.org/10.3987/com-04-10249.

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18

Tokuyama, Hidetoshi, Takahito Satoh, Touma Adachi, Juri Sakata y Kentaro Okano. "Synthetic Studies on Plakinidines". HETEROCYCLES 99, n.º 1 (2019): 310. http://dx.doi.org/10.3987/com-18-s(f)26.

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19

B. Repke, David, Robin D. Clark y Janis T. Nelson. "Synthetic Studies on Naulafine". HETEROCYCLES 27, n.º 10 (1988): 2289. http://dx.doi.org/10.3987/com-88-4631.

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20

Ogawa, Tomoya. "Synthetic Studies on Glycoconjugates". Nippon Nōgeikagaku Kaishi 69, n.º 8 (1995): 999–1011. http://dx.doi.org/10.1271/nogeikagaku1924.69.999.

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21

KUWAHARA, Shigefumi. "Synthetic Studies on Semiochemicals". Nippon Nōgeikagaku Kaishi 70, n.º 11 (1996): 1249–55. http://dx.doi.org/10.1271/nogeikagaku1924.70.1249.

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22

Fukuyama, Tohru, Takashi Komori y Satoshi Yokoshima. "Synthetic Studies on Plakinidines". Synlett 26, n.º 11 (30 de abril de 2015): 1537–40. http://dx.doi.org/10.1055/s-0034-1380689.

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23

Naganawa, Atsushi, Yoshiyasu Ichikawa y Minoru Isobe. "Synthetic studies on tautomycin". Tetrahedron 50, n.º 30 (enero de 1994): 8969–82. http://dx.doi.org/10.1016/s0040-4020(01)85365-5.

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24

Rowley, Michael y Yoshito Kishi. "Synthetic studies on ophiobolins". Tetrahedron Letters 29, n.º 39 (enero de 1988): 4909–12. http://dx.doi.org/10.1016/s0040-4039(00)80638-3.

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25

Loh, Teck-Peng, Yew-Keong Chok y Zheng Yin. "Synthetic studies toward kaitocephalin". Tetrahedron Letters 42, n.º 44 (octubre de 2001): 7893–97. http://dx.doi.org/10.1016/s0040-4039(01)01631-8.

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26

Pain, Gilles, Didier Desmaële y Jean d'Angelo. "Synthetic studies toward zoapatanol". Tetrahedron Letters 35, n.º 19 (mayo de 1994): 3085–88. http://dx.doi.org/10.1016/s0040-4039(00)76835-3.

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27

Gladding, Jeffery A., James P. Bacci, Scott A. Shaw y Amos B. Smith. "Sporolide B: synthetic studies". Tetrahedron 67, n.º 35 (septiembre de 2011): 6697–706. http://dx.doi.org/10.1016/j.tet.2011.04.094.

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28

Aicher, Thomas D. y Yoshito Kishi. "Synthetic studies towards halichondrins". Tetrahedron Letters 28, n.º 30 (1987): 3463–66. http://dx.doi.org/10.1016/s0040-4039(00)96327-5.

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29

Broka, Chris A., Linda Hu, Wen Jee Lee y Tong Shen. "Synthetic studies on thyrsiferol". Tetrahedron Letters 28, n.º 42 (enero de 1987): 4993–96. http://dx.doi.org/10.1016/s0040-4039(00)96678-4.

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30

García, Isela, Manuel Pérez, Pedro Besada, Generosa Gómez y Yagamare Fall. "Synthetic studies toward zoapatanol". Tetrahedron Letters 49, n.º 8 (febrero de 2008): 1344–47. http://dx.doi.org/10.1016/j.tetlet.2007.12.088.

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31

McKillop, Alexander, Lee McLaren, Richard J. K. Taylor, Robert J. Watson y Norman Lewis. "Synthetic Studies Towards Aranorosin". Synlett 1992, n.º 03 (1992): 201–3. http://dx.doi.org/10.1055/s-1992-21313.

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32

Chang, Jonah J., Bryan Chan y Marco A. Ciufolini. "Synthetic studies toward spiroleucettadine". Tetrahedron Letters 47, n.º 21 (mayo de 2006): 3599–601. http://dx.doi.org/10.1016/j.tetlet.2006.03.024.

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33

Smith, Amos B. y Tamara L. Leenay. "Indole-Diterpene Synthetic Studies." Tetrahedron Letters 29, n.º 23 (enero de 1988): 2787–90. http://dx.doi.org/10.1016/0040-4039(88)85209-2.

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34

Smith, Amos B. y Tamara L. Leenay. "Indole-diterpene synthetic studies". Tetrahedron Letters 29, n.º 23 (enero de 1988): 2791–92. http://dx.doi.org/10.1016/0040-4039(88)85210-9.

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35

Pandit, U. K. "Synthetic studies on sesbanimides". Pure and Applied Chemistry 61, n.º 3 (1 de enero de 1989): 423–26. http://dx.doi.org/10.1351/pac198961030423.

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36

Bhakuni, D. S. "Synthetic studies towards forskolin". Pure and Applied Chemistry 62, n.º 7 (1 de enero de 1990): 1389–92. http://dx.doi.org/10.1351/pac199062071389.

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37

Shiogai, Akihiro, Tatsuya Toma y Satoshi Yokoshima. "Synthetic Studies on Bilobalide". Synlett 31, n.º 03 (10 de enero de 2020): 290–94. http://dx.doi.org/10.1055/s-0039-1691559.

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We disclose our synthetic studies on bilobalide, which features a Diels–Alder reaction of a cyclic anhydride to form two contiguous quaternary carbon centers, desymmetrization of a symmetric diol, and construction of a cyclic acetal under acidic conditions with inversion of configuration at an allylic position.
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38

Baraldi, P. G., A. Barco, S. Benetti, V. Ferretti, G. P. Pollini, E. Polo y V. Zanirato. "Synthetic studies towards forskolin". Tetrahedron 45, n.º 5 (enero de 1989): 1517–32. http://dx.doi.org/10.1016/0040-4020(89)80150-4.

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39

De Pessemier, Fritz, Paul Vanhee y Dirk Tavernier. "Synthetic Studies on Perhydronaphthacenes". Bulletin des Sociétés Chimiques Belges 86, n.º 7 (1 de septiembre de 2010): 551–60. http://dx.doi.org/10.1002/bscb.19770860709.

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40

Zuo, Zhiwei y Dawei Ma. "Synthetic Studies toward Communesins". Israel Journal of Chemistry 51, n.º 3-4 (abril de 2011): 434–41. http://dx.doi.org/10.1002/ijch.201100014.

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41

Ma, Zhiqiang, Bin Cheng y Hongbin Zhai. "Synthetic Studies Toward Harringtonolide". Asian Journal of Organic Chemistry 3, n.º 10 (6 de agosto de 2014): 1097–101. http://dx.doi.org/10.1002/ajoc.201402116.

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42

Venkateswar Reddy, Guvvala, Rotte Satish Chandra Kumar, Gundeti Shankaraiah, Katragadda Suresh Babu y Janaswamy Madhusudana Rao. "Synthetic Studies Toward (+)-Spongidepsin". Helvetica Chimica Acta 96, n.º 8 (agosto de 2013): 1590–600. http://dx.doi.org/10.1002/hlca.201200519.

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43

Sivaramakarthikeyan, Ramar, Shunmugam Iniyaval, Wei-Meng Lim, Ling-Wei Hii, Chun-Wai Mai y Chennan Ramalingan. "Pyrazolylphenanthroimidazole heterocycles: synthesis, biological and molecular docking studies". New Journal of Chemistry 44, n.º 45 (2020): 19612–22. http://dx.doi.org/10.1039/d0nj02214d.

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44

Brimble, Margaret A. y Rosliana Halim. "Synthetic studies toward shellfish toxins containing spiroacetal units". Pure and Applied Chemistry 79, n.º 2 (1 de enero de 2007): 153–62. http://dx.doi.org/10.1351/pac200779020153.

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The synthesis of the ABC spiroacetal-containing fragment of the marine biotoxins, the pectenotoxins (PTXs), is described. The synthetic strategy involves appendage of the highly substituted tetrahydofuran C ring to the AB spiroacetal unit via stereocontrolled cyclization of a γ-hydroxyepoxide. The bis-spiroacetal moiety of the spirolide family of shellfish toxins is also described, making use of an iterative radical oxidative cyclization strategy.
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45

Hansen, Trond Vidar, Stephen M'dachi, Lars Skattebøl y Yngve Stenstrøm. "Synthetic Studies towards Delta6-Protoilludene. A Formal Synthesis." Acta Chemica Scandinavica 52 (1998): 1373–79. http://dx.doi.org/10.3891/acta.chem.scand.52-1373.

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46

Mohr, Justin T. y Gennadii A. Grabovyi. "Synthetic studies toward the total synthesis of aeroplysinin". Arkivoc 2018, n.º 4 (21 de abril de 2018): 215–30. http://dx.doi.org/10.24820/ark.5550190.p010.491.

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47

Tsuboi, Katsunori, Yoshiyasu Ichikawa, Atsushi Naganawa, Minoru Isobe, Makoto Ubukata y Kiyoshi Isono. "Synthetic studies on tautomycin synthesis of Segment B". Tetrahedron 53, n.º 14 (abril de 1997): 5083–102. http://dx.doi.org/10.1016/s0040-4020(97)00228-7.

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48

Jiang, Jimin, Yoshiyasu Ichikawa y Minoru Isobe. "Synthetic studies on tautomycin synthesis of Segment C". Tetrahedron 53, n.º 14 (abril de 1997): 5103–22. http://dx.doi.org/10.1016/s0040-4020(97)00229-9.

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49

Smith, Amos B., Qiyan Lin, Victoria A. Doughty, Linghang Zhuang, Mark D. McBriar, Jeffrey K. Kerns, Armen M. Boldi et al. "Spongipyran synthetic studies. Total synthesis of (+)-spongistatin 2". Tetrahedron 65, n.º 33 (agosto de 2009): 6470–88. http://dx.doi.org/10.1016/j.tet.2009.04.001.

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50

Hirota, Hiroshi, Akihisa Yokoyama, Katsuaki Miyaji, Toshio Nakamura y Takeyoshi Takahashi. "Synthetic studies on quassinoids: Total synthesis of (±)-amarolide". Tetrahedron Letters 28, n.º 4 (enero de 1987): 435–38. http://dx.doi.org/10.1016/s0040-4039(00)95748-4.

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