Showing papers in "Tetrahedron in 2006"

TL;DR: A concise account of the isolation, bioactivity, and synthesis of bioactive quinazolinone-based natural products for the period 1983-2005 is given in this paper.

TL;DR: The methods used for the synthesis of vicinal diaryl-substituted pyrrole, pyrroline and pyrrolidine derivatives are reviewed in this article, which contains 461 references and summarizes bioactivity data of some of these compounds.

TL;DR: This review is aimed at highlighting the main chemical classes of glucosidase inhibitors, as well as their biological activities toward α- and β-glucosidases, but it is not intended to be an exhaustive review on the subject.

TL;DR: A new recently published application of 2,4,6,trichloro-1,3,5-triazine (CC) and its derivatives in organic synthesis is reviewed in this paper.

TL;DR: This compilation clearly demonstrates the power and economical interest of asymmetric catalysed domino reactions in the field of synthetic organic chemistry including the asymmetric biocatalysed Domino reactions.

TL;DR: The purpose of this Report is to provide an overview of the increasingly popular new separation technique of fluorous solid-phase extraction (F-SPE), which has matured rapidly and is now ready for prime time, as illustrated by the expanding uses over the last 2–3 years.

TL;DR: In this article, a review of the most recent advances in asymmetric synthesis using chiral sulfoxides is presented, focusing on their use as chiral auxiliaries and their applications in the synthesis of biologically active products.

TL;DR: Asymmetric domino reactions are reviewed for the first time in this article, covering the classification and characteristics of these reactions together with the most important applications, showing that the concept of asymmetric Domino reactions has emerged as a powerful tool in asymmetric synthetic chemistry.

TL;DR: Palladium-catalyzed ligand directed C-H activation/halogenation reactions have been extensively explored in this paper, where both the nature of the directing group and the substitution pattern on the arene ring of the substrate lead to different reactivity profiles, and often different and complementary products, in the presence and absence of the catalyst.

TL;DR: The effect of bases, acids, and water as additives in proline-catalyzed ketone-aldehyde aldol reactions has been studied in this paper, where the reaction appears to be relatively tolerant to small amounts of tertiary amine bases or weak acids, it stops completely with strong acids.

TL;DR: In this article, a facile and efficient one-pot synthesis of polyhydroquinoline derivatives at ambient temperature using Ceric Ammonium Nitrate (CAN) as catalyst via the Hantzsch reaction was reported.

TL;DR: The major developments in the synthesis, reactions, and applications of triaryl- and triheteroarylmethanes are described in this paper, with a focus on the use of triethylamine derivatives.

TL;DR: In this article, the electrophilic α-alkylation of ketones with alcohols is accomplished by a hydrogen autotransfer process catalyzed by RuCl 2 (DMSO) 4.

TL;DR: Enzymatic preparations of highly enantiopure β-amino acids have been reviewed and new approaches to improve the quality and consistency of these preparations are proposed.

TL;DR: Synthesis of spiro and hetero spiro compounds has been reviewed on the basis of a synthon approach along with their biological activities and photochromism in this paper, where the synthesis process is described in detail.

TL;DR: Syntheses and spectroscopic properties of benzophenoxazine fluorescent dyes are reviewed from the perspective of their potential applications as probes in biotechnology, especially with respect to intracellular imaging.

TL;DR: In this paper, a novel method was described for the synthesis of oxygenated benzofurans by epoxidation and cyclisation of 2′-hydroxystilbenes, corresponding to the latter were synthesised by Wittig reactions.

TL;DR: Boradiazaindacenes with methyl substituents at 3 and 5 positions were for the first time shown to undergo efficient double condensation reactions with an aromatic aldehyde yielding a series of extended conjugation dyes as discussed by the authors.

TL;DR: Gold nanoparticles supported on nanocrystalline ceria (Au/CeO2) is a general, air and moisture-stable, commercial catalyst for the atmospheric pressure, solventless oxidation of aromatic, primary and secondary alcohols to the corresponding benzaldehyde or ketone compound.

TL;DR: In this paper, the viability of the type II nickel-catalyzed intramolecular [4+4] cycloaddition of bis-dienes was investigated. But the results were limited.

TL;DR: In this paper, the electrophilic β-alkylation of secondary alcohols with primary alcohols is accomplished by a hydrogen autotransfer process catalyzed by RuCl2(DMSO)4.

TL;DR: Ceric ammonium nitrate efficiently catalyzes the reaction of isatin with indoles under sonic waves to afford symmetric 3,3-di(indolyl)indolin-2-ones in excellent yields.

TL;DR: In this paper, primary, secondary, and aromatic azides undergo 1,3 dipolar cycloaddition-coupling with an excess of alkyne in the presence of Cu(CH 3 CN) 4 PF 6 as catalyst, N, N, N ′-trimethylethylenediamine as ligand, molecular oxygen, and 4methoxymorpholine N -oxide (NMO) as co-oxidant to afford 1,4,5-trisubstituted-1,2,3-triazoles

TL;DR: In this article, the acid-free, organocatalytic acetalization of various aldehydes and ketones with N,N′-bis[3,5-bis(trifluoromethyl)phenyl]thiourea is presented.

TL;DR: In this paper, the structures of the thioethers 6a-6c and compound 10a were determined by X-ray diffraction and they were better described by structure 10 than 7.