Synthetic Studies Directed Toward Streptenol D: Enantioselective Preparation of the 3,5-diacetoxy-6\u3cem\u3eE\u3c/em\u3e,8\u3cem\u3eE\u3c/em\u3e-decadiene Segment [PDF]
The enantioselective preparation of 2-(3′R,5′R-diacetoxy-6E,8E-decadienyl)-1,3-dioxane, (+)-13, is described. This synthesis of the skeleton of streptenol D utilizes the ability of a diene-complexed (tricarbonyl)iron unit to serve as a protecting and ...
Dasgupta, Bireshwar, Donaldson, William
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Glucopyranosylidene-Spiro-Thiazolinones: Synthetic Studies and Determination of Absolute Configuration by TDDFT-ECD Calculations [PDF]
Reactions of O-peracylated C-(1-bromo-β-d-glucopyranosyl)formamides with thioamides furnished the corresponding glucopyranosylidene-spiro-thiazolin-4-one.
Kun, Sándor +4 more
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Wir stellen ein Cu(II)‐photokatalytisches Verfahren vor, bei dem handelsübliche Nitroalkane für die Synthese von Isoxazolinen und Isoxazolen aus Alkenen bzw. Alkinen verwendet werden. Detaillierte mechanistische Untersuchungen ergaben, dass der breite Substratbereich, der sowohl aktivierte als auch nicht aktivierte Alkene und Alkine umfasst, auf einen ...
Sunaina Sardana +3 more
wiley +1 more source
Cycloaddition reactions of nitrosoalkenes, azoalkenes and nitrile oxides mediated by hydrotalcite [PDF]
Mg:Al 3:1 hydrotalcite (Ht), used in catalytic quantities, promotes the generation of nitrosoalkenes, azoalkenes and nitrile oxides. These can be intercepted in situ by heterocycles and olefins in [4+2] and [3+2] cycloaddition reactions, producing ...
Lemos, A., Lourenço, J. P.
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Asymmetric Lewis acid-catalyzed 1,3-dipolar cycloadditions [PDF]
Highly tuned, one-point binding chiral iron and ruthenium complexes selectively coordinate and activate α,β-unsaturated aldehydes and ketones toward asymmetric catalytic Diels-Alder cycloaddition reactions.
Brinkmann, Yasmin +3 more
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ABSTRACT Pesticide contamination in freshwater ecosystems poses a significant threat to water quality and aquatic life, potentially disrupting entire food webs. Fluxametamide (FMT), a novel insecticide regarded as safe for nontarget species, has not been extensively studied in aquatic environments, raising concerns about its potential toxicity to ...
Desty Pratiwi +5 more
wiley +1 more source
Orthogonal, metal-free surface modification by strain-promoted azide–alkyne and nitrile oxide–alkene/alkyne cycloadditions [PDF]
In this article we present a fast and efficient methodology for biochemical surface patterning under extremely mild conditions. Micropatterned azide/benzaldoxime-surfaces were prepared by microcontact printing of a heterobifunctional cyclooctyne oxime ...
Arlinghaus, Heinrich F +6 more
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Syntheses of Isoxazoline-Based Amino Acids by Cycloaddition of Nitrile Oxides and Their Conversion into Highly Functionalized Bioactive Amino Acid Derivatives [PDF]
The present account illustrates the syntheses of isoxazoline- based amino acids by the cycloaddition of 1,3-dipolar nitrile oxides to the C–C double bond of unsaturated amino acid derivatives, with focus on the regio- and stereoselectivities of the ...
Fülöp, Ferenc +2 more
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Aryl nitrile oxide cycloaddition reactions in the presence of pinacol boronic acid ester
An aryl substrate with dual functionality consisting of a nitrile oxide and a pinacolyl boronate ester was prepared by mild hypervalent iodine oxidation (diacetoxyiodobenzene) of the corresponding aldoxime, without decomposition of the boronate ...
Sarah L. Harding +2 more
doaj +1 more source
Синтез (2-фторфенил)-и (4-фторфенил)-(2-нитрометилциклопентил)метанонов как предшественников фторсодержащих простаноидов [PDF]
Осуществлен синтез новых фторсодержащих первичных нитросоединений ? (2-фторфенил) и (4-фторфенил)-(2-нитрометилциклопентил)метанонов посредством 1,4-присоединения нитрометана к 1-ацилциклопентенам, полученным в результате восстановительного расщепления ...
Антоневич, Инесса Петровна +2 more
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