Showing papers in "Tetrahedron in 2014"

TL;DR: In this paper, a simple cation sensor 1 ((E)-9-((2-hydroxynaphthalen-1-ylimino)methyl)-1,2,3,5,6,7-hexahydropyrido[3, 2,1-ij]quinolin-8-ol) bearing both a julolidine moiety and a naphthol moiety was designed and synthesized as a colorimetric sensor for Cu2+.

TL;DR: In this paper, the authors discuss the recent developments in alkyne borylations in the context of Tetrahedron, and propose a method to solve the problem of alkyn-borylations.

TL;DR: In this article, a review of recent and selected applications of the Stille reaction in the total synthesis of natural products is discussed, and a number of the most relevant applications are discussed.

TL;DR: Magnetic Fe 3 O 4 nanoparticles as a heterogeneous catalyst, were found to be efficient for the synthesis of a series of pyranopyrazoles by a four component reaction of a mixture of hydrazine hydrate, ethyl acetoacetate, aldehydes/ketones and malononitrile in water at room temperature as discussed by the authors.

TL;DR: An overview of the process controlled by indole signaling is given, current efforts to design indole-containing small molecules to intercept these pathways are summarized, and the synthetic efforts towards accessing indole derived bioactive small molecules are detailed.

TL;DR: This review will cover advances in this area over the last 20 years and the application of these strategies in complex molecule synthesis.

TL;DR: In this paper, Nanomagnetic-supported sulfonic acid is found to be a new, powerful, and reusable heterogeneous catalyst for the rapid synthesis of 3,4-dihydropyrimidin-2-(1H)-ones under conventional heating and microwave irradiation.

TL;DR: In this paper, an analysis of 12 three-atom components (TACs) participating in [3+2] cycloaddition reactions towards ethylene and acetylene allows establishing good correlations between the pseudodiradical character, the hardness η, and the nucleophilicity N index of the TAC with the feasibility of these nonpolar reaction.

TL;DR: Graphene supported PdCu bimetallic nanoparticles were synthesized through coreduction of PdCl 2 and CuCl 2 ·H 2 O in this article, where X-ray diffraction (XRD), Xray photoelectron (XPS) and transmission electron microscopy (TEM) were performed to characterize the structures.

TL;DR: In this paper, a copper-catalyzed sulfonylation of alkynes using sodium sulfinates in air produced regio-and stereoselectively (E)-alkenyl sulfones.

TL;DR: In this article, a review collects the recent developments in the synthesis and reactivity of methylene- and alkylidenecyclopropane derivatives, covering the literature since the beginning of 2010.

TL;DR: In this paper, a mild, redox neutral photocatalytic method for alkene hydrothiolation is reported, where catalytic radical initiation is achieved with the transition metal complex Ru(bpy)3Cl2, enabling rapid access to a diverse set of coupled products in excellent yield.

TL;DR: In this paper, a CuO nanoparticle-catalyzed one-pot process was proposed for the preparation of diverse quinazolinones from the readily available isatoic anhydride, aldehydes and amine or ammonium.

TL;DR: In this paper, the composition of the resulting Pd-co material was identified to be alloy structural and exhibited the highest catalytic activity for the Sonogashira-type coupling reactions and also exerted satisfied catalytic capability and recycle stability for Suzuki-Miyaura cross-coupling reactions.

TL;DR: In this paper, a simple and convenient approach for the synthesis of unsymmetrical diaryl tellurides (Te, Se, and S) has been developed by copper-catalyzed cross-coupling reaction of organoboronic acid with diaryl dichalcogenide in ethanol using NaBH4 in air or oxygen.

TL;DR: Tungstate ions supported on the periodic mesoporous organosilica with ionic liquid frameworks (WO4=@PMO-IL) were found to be a recoverable catalyst system for the highly selective oxidation of various primary or secondary alcohols to the corresponding aldehydes or ketones by 30% H2O2 as green oxidant under neutral aqueous reaction conditions as mentioned in this paper.

TL;DR: The types of naturally occurring tropones and tropolones are discussed and important methods developed for the synthesis of tropone and Tropolone natural products are outlined.

TL;DR: In this article, a multicomponent one-pot approach for the synthesis of substituted pyrano[2,3-c ]pyrazole and spiro-2-oxindole derivatives has been developed via a multi-component one pot approach in aqueous medium.

TL;DR: An efficient organocatalytic diastereo- and enantioselective method for the construction of spirocyclic oxindole derivatives bearing two Spiro quaternary centers and three consecutive stereocenters via a domino Michael/cyclization process has been developed.

TL;DR: In this paper, a copper-mediated trifluoromethylthiolation/trifluorsylselenolation of α-halo-α,β-unsaturated carbonyl substrates is reported.

TL;DR: In this paper, a set of seven non-substituted tri-atom components participating in [3+2] cycloaddition reactions has been studied using the reactivity indices defined within the conceptual DFT at the B3LYP/6-31G(d) level of theory.

TL;DR: A maleimide-substituted Mn-terpyridine cofactor is designed and synthesized and it is demonstrated that this cofactor could be incorporated into two different scaffold proteins to generate the desired ArMs.

TL;DR: A task-specific ionic liquid with a Bronsted acid (1-(3-sulfopropyl)-3-methylimidazolium hydrogen sulfate, namely MSI ) bearing an anionic heteropolyacid derivative ([PW 12 O 40 ] 3−, namely PW ) were used as an efficient catalyst for the three-component Mannich and Hantzsch reactions as discussed by the authors.

TL;DR: A commercially available ruthenium (II) PNP type pincer catalyst (Ru-Macho) promotes formation of amides and imines from alcohols and amines via an acceptorless dehydrogenation pathway.