Showing papers in "European Journal of Organic Chemistry in 2003"

TL;DR: The spiro[pyrrolidine-3,3′-oxindole] ring system is found at the core of a number of alkaloids, which possess significant biological activity and are interesting, challenging targets for chemical synthesis as discussed by the authors.

TL;DR: A review of isocyanide-based multicomponent reactions for heterocycle synthesis can be found in this paper, where the authors advocate a "substrate-design approach" in searching for novel MCRs.

TL;DR: The metal-catalyzed hydroboration reaction provides access to functionalized organoboron derivatives that cannot be easily prepared using traditional reagents as discussed by the authors, including neoteric reaction media and novel ligands.

TL;DR: In this paper, a review highlights some remarkable recently made achievements in the application of palladium-mediated processes to the design of multicomponent one-pot syntheses of heterocyclic compounds.

TL;DR: The most recent applications of the ring-closing metathesis reaction (RCM) to construct piperidine and pyrrolidine cores for the total synthesis of natural alkaloids are described in this paper.

TL;DR: In this article, aryl-substituted alkynes by substituted electron-rich arenes are catalyzed by AuCl3 activated by such silver salts as AgSbF6.

TL;DR: Potassium trifluoro(organo)borates, highly stable organoboron derivatives, have recently emerged as promising alternatives to other reagents as discussed by the authors, not only through intermediate formation of difluoroboranes, but also in transmetallation reactions with transition metals.

TL;DR: In this paper, a review of group-IV metal complex catalyzed hydroamination reactions of alkynes and allenes that appeared in the literature before July 31, 2002 is presented.

TL;DR: In this article, a large-scale conversion of perhydrocyclopentene 1 and perfluorocyclopentene 2 to formyl, carboxylate, boronyl, and hydrogen groups is described.

TL;DR: In this article, the authors give an overview of all the classes of reactions that have been performed on self-assemble monolayers, focusing on issues like steric hindrance, characterization, determination of yields and possibilities for multistep syntheses.

TL;DR: In this article, the authors synthesize authentic polybrominated diphenyl ethers (PBDEs) reference standards for analytical and toxicological studies, which are used as flame retardants.

TL;DR: The use of high-throughput experimentation (HTE) in homogeneous catalysis research for the production of fine can be found within a very short time frame as discussed by the authors. At the same time, a reliable process can be achieved because extensive imisation can be undertaken.

TL;DR: In this paper, a method for the synthesis of chloro-substituted subphthalocyanines employing a 1 M boron trichloride solution in p-xylene is described and compared to other previously described results.

TL;DR: In this paper, a review of 2,2, 6, 2,6, 2.2, and 2.5-terpyridine derivatives is presented, with a focus on terpyride chelating ligands in the fields of supramolecular and macromolecular chemistry.

TL;DR: In this article, rational strategies for the prepn. of all 10 2-, 3-, or 4-pyridinecarboxylic acids and all nine 2, 3-, 4-, or 8-quinolinecarboxyl acids bearing trifluoromethyl substituents at the 2-position were elaborated.

TL;DR: A review of approaches to the synthesis of purine derivatives bearing carbon substituents in positions 2, 6, or 8, mediated and/or catalysed by organometallic compounds and metals is given in this paper.

TL;DR: The potential of tetrathiafulvalene as a π-electron donor in molecular and supramolecular chemistry has been explored for more than 30 years as mentioned in this paper.

TL;DR: In this article, the direct conversion of allyl ethers to cyclic enol ethers using an olefin metathesis/double bond migration sequence was described, where Ruthenium carbene complexes were activated to catalyze the double bond migration step by addition of hydride sources, such as NaH or NaBH4.

TL;DR: In this paper, the palladium-catalyzed Suzuki−Miyaura cross-coupling reactions under mild conditions was carried out in a water-surfactant Pd/C system.

TL;DR: In this article, the authors give an account of synthetic methods developed for the preparation of annulenic systems and describe some of the interesting observed properties, such as conductivity or superconductivity and nonlinear optical effects.

TL;DR: In this article, a simple and efficient preparation of α-amino phosphonates under relatively mild conditions by the one-pot reaction of aldehydes with amines and dialkyl phosphites using catalytic amounts of SmI2 is described.

TL;DR: In this paper, vanadium(V) compounds were characterized (IR, UV/Vis, and 51V NMR spectroscopy, and in selected examples by X-ray diffraction analysis) and were applied as oxidation catalysts for the stereoselective synthesis of functionalized tetrahydrofurans.

TL;DR: The ring-chain tautomeric equilibria of 1,3-X,N-heterocycles have been extensively studied in the literature as discussed by the authors, including substituent effects on the tautomers.

TL;DR: In this paper, it was shown that the previously reported "carbohydroxypalladation" and the "hydroxycyclization catalyzed by PtII" are closely related reactions.

TL;DR: In the presence of enantiopure organocatalysts, 1-cycloalkene-1-carboxaldehydes and various nitrones furnished fused isoxazolidines as mentioned in this paper.

TL;DR: In this paper, the electronic properties of (hetero)aryl ethynyl-substituted N-methyl-phenothiazines (UV/Vis absorption, fluorescence, redox potentials) strongly correlate with Hammett σP parameters and indicate that remote substituents transmit their electronic information through πelectron delocalization and the σ-framework.

TL;DR: The 4,4,5,5-tetramethyl-1,3,2-dioxaborolanyl group was directly introduced into the 2-positions of azulenes with high selectivity by the C−H activation method with use of iridium catalysis.

TL;DR: In this article, the authors describe a class of catalysts that use covalent binding to substrates at a site different from the reaction center and exhibits turnover, which is the result of a uniform stabilization of bound species, including both the transition state and also encounter complexes.

TL;DR: Microwave-assisted transition-metal-free Sonogashira-type coupling reactions are described in this article, where the reactions are run in water as the sole solvent, without the need for copper(I) or any transition metal−phosphane complex.

TL;DR: In this paper, the photochromic naphtho[1,2-b]pyrans were obtained from 2-methyl-1-naphthol under alumina catalysis.