Showing papers in "European Journal of Organic Chemistry in 2014"

TL;DR: The CF3S group has always interested chemists because of its high lipophilicity, and strategies to introduce it into organic molecules have been, for the most part, reserved to specialized chemists.

TL;DR: The 1,2,3-triazole skeleton can be present as a single disubstituted ring, as a linker between two molecules, or embedded in a polyheterocycle.

TL;DR: In this paper, a review of recent progress in BODIPY-sensitized solar cells is reviewed, including the development of effective red/NIR photosensitizers, which can offer magnificent characteristics such as sharp and moderately strong absorption, large quantum yields, long excited state lifetime, good solubility and easy chromatographic separation.

TL;DR: A review of recent design elements integrated into dual hydrogen-bond donor (HBD) catalyst scaffolds and their influence on HBD catalyst performance can be found in this article.

TL;DR: This review surveys recent developments (reported in the last fifteen years) in organometallic-chemistry-based methods for the functionalization of imidazo[1,2-a]pyridines by means of reactions such as Sonogashira, Heck, Negishi, Suzuki–Miyaura, and Stille cross-coupling.

TL;DR: This review outlines some selected examples of palladium-catalyzed direct allylic functionalization, showing how this old reaction, ignored for many years, is now living a new and exciting era.

TL;DR: The design, synthesis and study of novel catalysts with helical structures have had an enormous impact on asymmetric synthesis and continue to be a field of intense interest as mentioned in this paper, however, the story behind the development of these molecules is usually different in each case, in part due to differences in their synthetic accessibilities.

TL;DR: In this paper, multi-branched multi-anchoring metal-free dyes as photosensitizers for dye-sensitized solar cells (DSSCs) are reviewed.

TL;DR: It was found that α-fluoro sulfoximines show unique chemical behaviour characteristics significantly different from those of their non-fluorinated counterparts, which have attracted much attention in life sciences and the pharmaceutical industry.

TL;DR: The [3+2] cycloaddition of CF3CHN2, generated in situ, with electron-deficient alkenes/alkynes affords CF3-substituted pyrazolines/pyrazoles in quantitative yields as discussed by the authors.

TL;DR: In this paper, β-Keto sulfones were obtained in good yields (73-94%) from unactivated olefins by employing inexpensive sodium arenesulfinate salts as sulfonylating agents and K2S2O8 as a radical initiator in open flasks and aqueous media at room temperature under transition-metal-free conditions.

TL;DR: In this article, aryl sulfinic acid sodium salts with N-arylacrylamides did not give the desulfinative products, instead, aryls sulfonated products were produced.

TL;DR: A strategy to introduce the SCF3 group through the CuI-promoted reaction of diazo compounds with the nucleophilic AgSCF3 trifluoromethylthiolation reagent was developed in this article.

TL;DR: In this article, the relevant contributions of the last twenty years with respect to the developments and applications of heterocyclic ketene aminals, categorized by reaction type, are discussed.

TL;DR: A review of metal-catalyzed approaches for the preparation of vinyl thioethers can be found in this paper, where the photo-induced free-radical strategy is used as a complementary tool to the copper-calyzed azide-alkyne cycloaddition.

TL;DR: New cysteine protecting groups that replace obsolete protecting groups, reduce racemization, or facilitate regioselective disulfides formation, new disulfide formation strategies to assist in the synthesis of complexdisulfide-rich peptides, and the use of selenocysteine to direct disulfite formation are explored.

TL;DR: In this paper, a review of intermolecular alkyne hydroamination with primary amines in the presence of transition-metal catalysts that are regioselective for anti-Markovnikov addition is presented.

TL;DR: In this paper, an interesting palladium-catalyzed aminosulfonylation of aryl iodides was realized by using Na2SO3 as a cheap SO2 source.

TL;DR: A new copper-catalyzed regioselective cross-dehydrogenative coupling of coumarins with benzylic Csp3–H bonds has been developed, which provides direct access to a wide range of 3-benzylcoumarins in moderate to good yields.

TL;DR: In this paper, a review of catalytic enanti-lective protonation (EP) processes is presented, focusing on the scope and limitations of these new catalytic EP processes.

TL;DR: In this paper, the authors present a survey of task-specific ionic liquids (TSILs) and their applications in various specific fields, such as solvent catalysts in organic synthesis and metal-catalysed processes, and as fluids in metal extraction processes and gas capture.

TL;DR: The transition-metal-free 2,2,2-trifluoroethylation and gem-difluorovinylation of arylboronic acids were developed in this article.

TL;DR: This organocatalytic methodology tolerated a range of substituents either in the β-oxo-amides or in the aryl azidophenyl selenides and proved to be an efficient methodology for the combinatorial synthesis of new selenium-containing triazole compounds.

TL;DR: These efforts to obtain a new class of systematically modified bifunctional (thio)urea-containing quaternary ammonium salts based on easily obtainable chiral backbones found those based on trans-1,2-cyclohexane diamine were found to be the most powerful for the asymmetric α-fluorination of β-keto esters.

TL;DR: An efficient and mild synthesis of imidazo[1,2-a]pyrimidine derivatives has been developed from readily available pyrimidyl arylamines or enamines through a hypervalent iodine-promoted intramolecular C–H bond cycloamination reaction.

TL;DR: In this article, the authors describe the various strategies that have propelled the development of asymmetric iodolactonization to its current state, putting an emphasis on catalysis. But the current progress in catalytic asymmetric IO has happened only in the space of the last three years, and a number of conceptually different approaches have already been applied to advance beyond the substrate-controlled reaction.

TL;DR: An overview of the organometallic synthetic approaches to lowbandgap polymers for organic solar cells from 2008 to the present is reported in this paper, with consideration not only of research laboratory criteria, but also of parameters relevant to mass production: synthetic complexity, amount and toxicity of reactants and by-products, and purification steps.

TL;DR: In this paper, the direct carbonation mechanism of alcohols in the presence of 1,8-diazabicyclo[5.4.0]undec-7-ene, 1-butyl-3-methylimidazolium hexafluorophosphate, and dibromomethane was probed by 18O-labeling experiments and chiral alcohol experiments.

TL;DR: The activation of the sulfur atom of thiols with DIB has been explored in the preparation of symmetrical disulfides and sulfenamides and was successfully extended to indole as a representative electron-rich aromatic compound, which allowed successful construction of a S–C bond in one pot.

TL;DR: These reactions have been further applied to the preparation of various fused heterocyclic systems and the “post-condensation” studies are also covered in this review.