Journal articles on the topic 'Synthetic studies'

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1

Ackermann, Stefanie, Hans-Georg Lerchen, Dieter Häbich, Angelika Ullrich, and Uli Kazmaier. "Synthetic studies towards bottromycin." Beilstein Journal of Organic Chemistry 8 (October 1, 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, no. 9 (January 1, 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., and Liebeskind Lanny S. "Saframycin synthetic studies." Tetrahedron 47, no. 30 (July 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, and Joseph Barbosa. "Complestatin synthetic studies." Bioorganic & Medicinal Chemistry Letters 14, no. 7 (April 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, and Madalena Pinto. "Synthetic Chiral Derivatives of Xanthones: Biological Activities and Enantioselectivity Studies." Molecules 24, no. 4 (February 22, 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, and Matthias Gottschalk. "Synthetic and natural Fe-Mg chloritoid: structural, spectroscopic and thermodynamic studies." European Journal of Mineralogy 12, no. 2 (March 29, 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, no. 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, no. 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, and Mohammad Manchur. "A Synthetic Approach of D-Glucose Derivatives: Spectral Characterization and Antimicrobial Studies." Chemistry & Chemical Technology 8, no. 1 (March 15, 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, and A. Martinelli. "Structural studies on synthetic and natural Fe-Sb-oxides of MO2 type." Neues Jahrbuch für Mineralogie - Monatshefte 2003, no. 9 (September 14, 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, and Shuanhu Gao. "Synthetic studies on daphniglaucins." Chemical Communications 54, no. 44 (2018): 5554–57. http://dx.doi.org/10.1039/c8cc03063d.

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12

Ferjancic, Zorana, Radomir Matovic, and Radomir Saicic. "Synthetic studies towards d-modified paclitaxel analogues." Journal of the Serbian Chemical Society 77, no. 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, and Masayuki Kirihara. "Synthetic Studies on Heteroanthracyclines." HETEROCYCLES 46, no. 1 (1997): 705. http://dx.doi.org/10.3987/rev-97-sr3.

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14

Takami, Hitoshi, Hirokazu Koshimura, and Toshiaki Kumazawa. "Synthetic Studies on Trifluoroacetylindoles." HETEROCYCLES 51, no. 5 (1999): 1119. http://dx.doi.org/10.3987/com-99-8480.

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15

TANAKA, Toshio, and Seizi KUROZUMI. "Synthetic Studies of Isocarbacyclins." Journal of Synthetic Organic Chemistry, Japan 50, no. 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, no. 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, and Kiyoshi Nishitani. "Synthetic Studies on Azacyclotribenzylenes." HETEROCYCLES 65, no. 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, and Kentaro Okano. "Synthetic Studies on Plakinidines." HETEROCYCLES 99, no. 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, and Janis T. Nelson. "Synthetic Studies on Naulafine." HETEROCYCLES 27, no. 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, no. 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, no. 11 (1996): 1249–55. http://dx.doi.org/10.1271/nogeikagaku1924.70.1249.

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22

Fukuyama, Tohru, Takashi Komori, and Satoshi Yokoshima. "Synthetic Studies on Plakinidines." Synlett 26, no. 11 (April 30, 2015): 1537–40. http://dx.doi.org/10.1055/s-0034-1380689.

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23

Naganawa, Atsushi, Yoshiyasu Ichikawa, and Minoru Isobe. "Synthetic studies on tautomycin." Tetrahedron 50, no. 30 (January 1994): 8969–82. http://dx.doi.org/10.1016/s0040-4020(01)85365-5.

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24

Rowley, Michael, and Yoshito Kishi. "Synthetic studies on ophiobolins." Tetrahedron Letters 29, no. 39 (January 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, and Zheng Yin. "Synthetic studies toward kaitocephalin." Tetrahedron Letters 42, no. 44 (October 2001): 7893–97. http://dx.doi.org/10.1016/s0040-4039(01)01631-8.

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26

Pain, Gilles, Didier Desmaële, and Jean d'Angelo. "Synthetic studies toward zoapatanol." Tetrahedron Letters 35, no. 19 (May 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, and Amos B. Smith. "Sporolide B: synthetic studies." Tetrahedron 67, no. 35 (September 2011): 6697–706. http://dx.doi.org/10.1016/j.tet.2011.04.094.

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28

Aicher, Thomas D., and Yoshito Kishi. "Synthetic studies towards halichondrins." Tetrahedron Letters 28, no. 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, and Tong Shen. "Synthetic studies on thyrsiferol." Tetrahedron Letters 28, no. 42 (January 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, and Yagamare Fall. "Synthetic studies toward zoapatanol." Tetrahedron Letters 49, no. 8 (February 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, and Norman Lewis. "Synthetic Studies Towards Aranorosin." Synlett 1992, no. 03 (1992): 201–3. http://dx.doi.org/10.1055/s-1992-21313.

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32

Chang, Jonah J., Bryan Chan, and Marco A. Ciufolini. "Synthetic studies toward spiroleucettadine." Tetrahedron Letters 47, no. 21 (May 2006): 3599–601. http://dx.doi.org/10.1016/j.tetlet.2006.03.024.

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33

Smith, Amos B., and Tamara L. Leenay. "Indole-Diterpene Synthetic Studies." Tetrahedron Letters 29, no. 23 (January 1988): 2787–90. http://dx.doi.org/10.1016/0040-4039(88)85209-2.

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34

Smith, Amos B., and Tamara L. Leenay. "Indole-diterpene synthetic studies." Tetrahedron Letters 29, no. 23 (January 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, no. 3 (January 1, 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, no. 7 (January 1, 1990): 1389–92. http://dx.doi.org/10.1351/pac199062071389.

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37

Shiogai, Akihiro, Tatsuya Toma, and Satoshi Yokoshima. "Synthetic Studies on Bilobalide." Synlett 31, no. 03 (January 10, 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, and V. Zanirato. "Synthetic studies towards forskolin." Tetrahedron 45, no. 5 (January 1989): 1517–32. http://dx.doi.org/10.1016/0040-4020(89)80150-4.

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39

De Pessemier, Fritz, Paul Vanhee, and Dirk Tavernier. "Synthetic Studies on Perhydronaphthacenes." Bulletin des Sociétés Chimiques Belges 86, no. 7 (September 1, 2010): 551–60. http://dx.doi.org/10.1002/bscb.19770860709.

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40

Zuo, Zhiwei, and Dawei Ma. "Synthetic Studies toward Communesins." Israel Journal of Chemistry 51, no. 3-4 (April 2011): 434–41. http://dx.doi.org/10.1002/ijch.201100014.

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41

Ma, Zhiqiang, Bin Cheng, and Hongbin Zhai. "Synthetic Studies Toward Harringtonolide." Asian Journal of Organic Chemistry 3, no. 10 (August 6, 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, and Janaswamy Madhusudana Rao. "Synthetic Studies Toward (+)-Spongidepsin." Helvetica Chimica Acta 96, no. 8 (August 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, and Chennan Ramalingan. "Pyrazolylphenanthroimidazole heterocycles: synthesis, biological and molecular docking studies." New Journal of Chemistry 44, no. 45 (2020): 19612–22. http://dx.doi.org/10.1039/d0nj02214d.

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44

Brimble, Margaret A., and Rosliana Halim. "Synthetic studies toward shellfish toxins containing spiroacetal units." Pure and Applied Chemistry 79, no. 2 (January 1, 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, and 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., and Gennadii A. Grabovyi. "Synthetic studies toward the total synthesis of aeroplysinin." Arkivoc 2018, no. 4 (April 21, 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, and Kiyoshi Isono. "Synthetic studies on tautomycin synthesis of Segment B." Tetrahedron 53, no. 14 (April 1997): 5083–102. http://dx.doi.org/10.1016/s0040-4020(97)00228-7.

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48

Jiang, Jimin, Yoshiyasu Ichikawa, and Minoru Isobe. "Synthetic studies on tautomycin synthesis of Segment C." Tetrahedron 53, no. 14 (April 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, no. 33 (August 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, and Takeyoshi Takahashi. "Synthetic studies on quassinoids: Total synthesis of (±)-amarolide." Tetrahedron Letters 28, no. 4 (January 1987): 435–38. http://dx.doi.org/10.1016/s0040-4039(00)95748-4.

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