Academic literature on the topic 'Dihydroisocoumarins'

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Journal articles on the topic "Dihydroisocoumarins"

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Liu, Shenghui, Hailong He, Min Gan, Peng Yi та Xiaojian Jiang. "Catalytic Asymmetric Intramolecular Bromolactonization of α,β-Unsaturated Ketones". Synlett 30, № 12 (2019): 1474–78. http://dx.doi.org/10.1055/s-0037-1611860.

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Enantioselective bromolactonization by using an amino-urea catalyst to generate the important bromo-containing 3,4-dihydroisocoumarins is described. Excellent yields and good enantioselectivities could be achieved for various 3,4-dihydroisocoumarin compounds.
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Kern, Friedrich, and Hans Jürgen Bestmann. "Pheromones 98* Olfactory Electroantennogram Responses of the Formicine Ants Lasius niger and Formica Species (Hymenoptera: Formicidae) to 3,4-Dihydroisocoumarins." Zeitschrift für Naturforschung C 49, no. 11-12 (1994): 865–70. http://dx.doi.org/10.1515/znc-1994-11-1223.

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Electroantennogram (EAG) studies of the formicine genera Lasius and Formica (Hymenoptera, Formicidae) were carried out with 3,4-dihydroisocoumarins, recently identified as trail pheromones within this ant subfamily. The here investigated formicine species Lasius niger, Formica rufa, F. fusca and F. sanguinea were all responsive towards stimuli of synthetic 3,4-dihydroisocoumarins. Synthesized samples of natural 3,4-dihydroisocoumarins, found in the hindgut of these species evoke the highest electrophysiological responses while structure analogues were less efficient. Number and position of the
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Yang, Chao, Wujiong Xia, Xiao Zhang, and Binbin Huang. "Photoinduced Regioselective Lactonization of ortho-Iodobenzoic Acids with Alkenes: Synthesis of 3,4-Dihydroisocoumarin Derivatives." Synlett 29, no. 01 (2017): 131–35. http://dx.doi.org/10.1055/s-0036-1588541.

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A photoinduced strategy for the synthesis of a variety of 3,4-dihydroisocoumarins has been realized. The reactions proceeded from ortho-iodobenzoic acids and alkenes through a photodehalogenative lactonization with NaHCO3 as the only additive in dimethyl sulfoxide (DMSO) to provide the desired products in moderate to good yields. This method offers a simple, mild, and environmentally friendly route to 3,4-dihydroisocoumarin derivatives.
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Ortiz, Aurelio, Miriam Castro, and Estibaliz Sansinenea. "3,4-Dihydroisocoumarins, Interesting Natural Products: Isolation, Organic Syntheses and Biological Activities." Current Organic Synthesis 16, no. 1 (2019): 112–29. http://dx.doi.org/10.2174/1570179415666180924123439.

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Background:3,4-dihydroisocoumarins are an important small group belonging to the class of naturally occurring lactones isolated from different bacterial strains, molds, lichens, and plants. The structures of these natural compounds show various types of substitution in their basic skeleton and this variability influences deeply their biological activities. These lactones are structural subunits of several natural products and serve as useful intermediates in the synthesis of different heterocyclic molecules, which exhibit a wide range of biological activities, such as anti-inflammatory, antipl
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Shimada, Atsumi, Tomohisa Inokuchi, Miyako Kusano, et al. "4-Hydroxykigelin and 6-Demethylkigelin, Root Growth Promoters, Produced by Aspergillus terreus." Zeitschrift für Naturforschung C 59, no. 3-4 (2004): 218–22. http://dx.doi.org/10.1515/znc-2004-3-417.

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Root growth promoters, 4-hydroxykigelin (1) and 6-demethylkigelin (2), together with 6- hydroxymellein (3) were isolated from cultures of the fungus Aspergillus terreus and their structures were identified by spectroscopic analysis. The biological activities of the three dihydroisocoumarins, 1, 2, and 3, have been examined using a bioassay method with lettuce seedlings. Furthermore, interactions between the dihydroisocoumarins and indole-3-acetic acid against the root growth have been examined.
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Zhang, Qiang, Lin-Yan Zhang, and Xian-Ying Shi. "Copper-Promoted Intramolecular Oxidative Dehydrogenation for Synthesizing Dihydroisocoumarins and Isocoumarins." Molecules 28, no. 17 (2023): 6319. http://dx.doi.org/10.3390/molecules28176319.

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Isocoumarins and dihydroisocoumarins are important skeletons with a wide range of biological activities, such as anti-bacterial, anti-allergy, anti-fungal, anti-tumor, and anti-HIV properties. Herein, we demonstrated divergent syntheses of isocoumarins and 3,4-dihydroisocoumarins by intramolecular dehydrogenative cyclization of 2-(3-oxobutyl) benzoic acids. This transformation undergoes Csp3–H bonds and O–H bonds coupling in air using copper salt. The reactions may undergo free radical process.
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Tabopda, Turibio, Gislain Fotso, Joseph Ngoupayo, Anne-Claire Mitaine-Offer, Bonaventure Ngadjui, and Marie-Aleth Lacaille-Dubois. "Antimicrobial Dihydroisocoumarins fromCrassocephalum biafrae." Planta Medica 75, no. 11 (2009): 1258–61. http://dx.doi.org/10.1055/s-0029-1185545.

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Jing, Songsong, Zhuo Qu, Chengcheng Zhao, et al. "Dihydroisocoumarins and Dihydroisoflavones from the Rhizomes of Dioscorea collettii with Cytotoxic Activity and Structural Revision of 2,2′-Oxybis(1,4-di-tert-butylbenzene)." Molecules 26, no. 17 (2021): 5381. http://dx.doi.org/10.3390/molecules26175381.

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The investigation of the constituents of the rhizomes of Dioscorea collettii afforded one new dihydroisocoumarin, named (−)-montroumarin (1a), along with five known compounds—montroumarin (1b), 1,1′-oxybis(2,4-di-tert-butylbenzene) (2), (3R)-3′-O-methylviolanone (3a), (3S)-3′-O-methylviolanone (3b), and (RS)-sativanone (4). Their structures were elucidated using extensive spectroscopic methods. To the best of our knowledge, compound 1a is a new enantiomer of compound 1b. The NMR data of compound 2 had been reported but its structure was erroneous. The structure of compound 2 was revised on the
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Qi, Jifeng, Ziyang Deng, Bo Huang та Sunliang Cui. "Metal-free α-alkylation of alcohols with para-quinone methides". Organic & Biomolecular Chemistry 16, № 15 (2018): 2762–67. http://dx.doi.org/10.1039/c8ob00568k.

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San Feliciano, Arturo, Jose Ma Miguel del Corral, Librada M. Cañedo, and Manuel Medarde. "3,4-dihydroisocoumarins from Ononis natrix." Phytochemistry 29, no. 3 (1990): 945–48. http://dx.doi.org/10.1016/0031-9422(90)80052-i.

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Dissertations / Theses on the topic "Dihydroisocoumarins"

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CHOUKCHOU, BRAHAM NOUREDDINE. "Synthese et etude de dihydroisocoumarines optiquement actives isolees de gingko biloba l." Université Louis Pasteur (Strasbourg) (1971-2008), 1995. http://www.theses.fr/1995STR13137.

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Cette these s'inscrit dans le cadre des etudes, au laboratoire de dermatochimie, des relations entre la structure et l'activite biologique des dihydroisocoumarines a longues chaines (avec 0, 1 ou 2 insaturations) optiquement actives isolees de ginkgo biloba l. ; nous avons developpe plusieurs approches permettant d'acceder a tous les membres de cette famille sous forme racemique ou chirale. Afin de confirmer la structure de ces dihydroisocoumarines, nous avons effectuee la synthese de la ()-8-hydroxy-3-tridecyl-3,4-dihydroisocoumarine, de la (3r)-(-)-8-hydroxy-3-tridecyl-3,4-dihydroisocoumarin
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Sher, Muhammad [Verfasser]. "Synthesis of functionalized homophthalates, salicylates, diaryl ethers and dihydroisocoumarins based on cyclocondensation reactions of 1,3-Dicarbonyl compounds and 1,3-Bis(silyloxy)-1,3-butadienes / vorgelegt von Muhammad Sher." 2008. http://d-nb.info/991886887/34.

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Book chapters on the topic "Dihydroisocoumarins"

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Shahzad, Sohail Anjum. "Synthesis of Isocoumarins and Dihydroisocoumarins." In Springer Theses. Springer Berlin Heidelberg, 2012. http://dx.doi.org/10.1007/978-3-642-33173-2_4.

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Dwivedi, Ram Snehi. "Phyllodulcin (Dihydroisocoumarin)." In Alternative Sweet and Supersweet Principles. Springer Nature Singapore, 2022. http://dx.doi.org/10.1007/978-981-33-6350-2_11.

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Braca, Alessandra, Ammar Bader, and Nunziatina De Tommasi. "Plant and Fungi 3,4-Dihydroisocoumarins." In Studies in Natural Products Chemistry Volume 37. Elsevier, 2012. http://dx.doi.org/10.1016/b978-0-444-59514-0.00007-9.

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Mc Inerney, Bernie Vincent, and Walter Charles Taylor. "The xenocoumarins and related biologically active dihydroisocoumarins." In Structure and chemistry (Part C). Elsevier, 1995. http://dx.doi.org/10.1016/s1572-5995(06)80138-9.

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Conference papers on the topic "Dihydroisocoumarins"

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Forni, J. A., A. F. P. Biajoli, E. T. da Penha, and C. R. D. Correia. "Expeditious syntheses of 3,4-dihydroisocoumarins and phthalides via a Heck-Matsuda reaction." In 14th Brazilian Meeting on Organic Synthesis. Editora Edgard Blücher, 2013. http://dx.doi.org/10.5151/chempro-14bmos-r0044-1.

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