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Showing papers in "Tetrahedron Letters in 2016"


Journal ArticleDOI
TL;DR: In this article, a review of bulk heterojunction organic solar cell (BHJ OSC) devices, structures, working principle, device characterization, perovskite type solar cell, and studies of the photovoltaic performance of carbazole based derivatives such as 2,7-carbazole, indolo[3,2- b ] carbazoles containing donors (D) coupled with various acceptors (A) namely benzothiadiazole, thiazolothiazoles, diketopyrrolopyrrole, and qu

177 citations


Journal ArticleDOI
TL;DR: The asymmetric Biginelli reaction as discussed by the authors involves acid-catalyzed one-pot synthesis of 3,4-dihydropyrimidin-2(1H)-ones (DHPMs) using easily accessible starting materials, namely, aldehyde, active methylene compound and (thio)urea.

166 citations


Journal ArticleDOI
TL;DR: A review of recent advances in trifluoromethylthiolation using nucleophilic reagents is presented in this paper, highlighting some of the most intriguing examples of the synthesis of triffluorometthylthio-containing compounds using novel reagents.

126 citations


Journal ArticleDOI
TL;DR: In this article, a mini-review of recent research advances on transition-metal (Pd, Ni) catalyzed C(sp3)H functionalization via bidentate directing group coordination is presented.

114 citations


Journal ArticleDOI
TL;DR: In this article, the authors reviewed various significant pathways of catalytic lignin oxidation and also discussed strengths and weaknesses between different Lignin oxide routes reported in the recent literature.

96 citations


Journal ArticleDOI
TL;DR: In this paper, recent advances in the filed of direct C-H functionalization of aromatics and heteroaromatics through nucleophilic displacement of hydrogen in an aromatic ring are discussed.

76 citations


Journal ArticleDOI
TL;DR: In this article, the authors highlight the emergence of the directed metal-free arylation approach employing simple sulfoxide and hypervalent aryliodane, characterized by an unusual, and synthetically attractive, retention of the reduced −SR and iodine fragment ortho to the newly formed C C bond.

68 citations


Journal ArticleDOI
TL;DR: In this paper, the authors summarized the dual transition metal-visible light photoredox catalytic processes including arylation, alkynylation, alkenylation and cyclization.

66 citations


Journal ArticleDOI
TL;DR: In this paper, the TFBen was used as a non-reacting CO source for carbonylation reactions in the presence of Phloroglucinol (1,3,5-trihydroxybenzene) as a reusable material for TFBen synthesis.

65 citations


Journal ArticleDOI
TL;DR: An efficient and practical method for the chemoselective ipso-hydroxylation of arylboronic acids was demonstrated using urea-hydrogen peroxide under catalyst free condition at room temperature as discussed by the authors.

63 citations


Journal ArticleDOI
TL;DR: The diversity of dicarboxylic acid anhydrides employable in the Castagnoli-Cushman reaction (CCR) was traditionally thought to be limited to the classical succinic and glutaric anhides, as well as to its remarkably more reactive counterpart, homophthalic anhydride.

Journal ArticleDOI
TL;DR: An iodine-catalyzed regioselective sulfenylation of indoles in the presence of DMSO has been presented and the notable features include easy operation, metal-free reaction conditions, and excellent functional group tolerance.

Journal ArticleDOI
TL;DR: In this paper, recent advances of oxa-Michael reaction in the total synthesis of representative oxygen-containing natural products, involving macrolides, terpenoids, chromanones and chromanes, polyoxygenated molecules and alkaloids are discussed, with the aim of providing a complement to existing reviews.

Journal ArticleDOI
TL;DR: In this paper, 3S,7R,11R,15-phytanic acid (SRR) and 3R, 7R, 11R, 15-phytanic acid diastereomers were determined by GC-MS in extracts of archaeological ceramic.

Journal ArticleDOI
TL;DR: In this article, an overview on recent progress in catalyst system modifications to achieve regioselectivity in Tsuji-Wacker oxidation is given. But the influence of the substrate bearing directing group on Tsuji Wacker is briefly described.

Journal ArticleDOI
TL;DR: In this article, a one-pot synthesis of 2-amino-3-cyanopyridine derivatives has been demonstrated through the multicomponent reaction of aldehydes, ketones, malononitrile, and ammonium acetate using graphene oxide as a heterogeneous catalyst in water as a green medium.

Journal ArticleDOI
TL;DR: In this article, a set of tools (ruthenium, C-H bonds, directing groups) are presented for the tailored formation of new C-C and C-heteroatom bonds.

Journal ArticleDOI
TL;DR: In this paper, the regeneration of the active catalyst was possible by means of reagents that reduce in situ the phosphine oxide formed during the reaction, and the results on newly developed phosphine-catalyzed reactions were summarized.

Journal ArticleDOI
TL;DR: In this paper, a colorimetric and fluorescent dual probe for CO detection was designed and synthesized, which is capable of sensitive and specific detection of CO with naked-eye through colourimetric assay in phosphate buffer from colorless to yellow.

Journal ArticleDOI
TL;DR: In this article, a simple one-step hydrothermal process was used to obtain TiO 2 /MoS 2 nanocomposite photocatalyst with high activity toward the thiocyanation of indoles under visible light irradiation at room temperature.

Journal ArticleDOI
TL;DR: In this paper, the authors describe a highly efficient and eco-friendly protocol for the synthesis of benzimidazoles, benzothiazoles, and quinoxalines using VOSO4 as a catalyst in ethanol.

Journal ArticleDOI
TL;DR: In this paper, a convenient methodology has been developed for palladium catalyzed Sonogashira cross-coupling reaction under mild and green reaction conditions, in the absence of any organic or inorganic base, ligand and copper salt with excellent yield of cross coupled product.

Journal ArticleDOI
TL;DR: In this article, a simple Schiff base L derived from 2-hydroxy-naphthalene-1-carbaldehyde and benzene 1,2-diamine, was proved to be a turn-on fluorescent probe for the recognition of Al 3+, based on photoinduced electron transfer (PET) mechanism.

Journal ArticleDOI
TL;DR: In this article, the authors summarized the recent advances in the catalytic enantioselective 1,2-alkynylation of carbonyls and imines, including poorly reactive α-ketoesters and α -ketimine esters.

Journal ArticleDOI
TL;DR: In this article, a simple, efficient, and environmentally friendly approach has been developed for the synthesis of peptides in aqueous medium, where peptides are easily synthesized in water extract of banana (WEB)/ethylene glycol and without using external base under mild condition.

Journal ArticleDOI
Bing Zhao1, Liu Ting1, Yue Fang1, Liyan Wang1, Bo Song1, Qigang Deng1 
TL;DR: Two isomeric Schiff bases fluorescence sensors (PIC1 and PIC2) based on phenanthro[9,10-d]imidazole-coumarin derivatives were designed, synthesized and characterized, which both represented the selective ‘turn-off’ fluorescence phenomenon caused by paramagnetic quenching effect of Fe3+ with the formation of 1:1 sensor-Fe complexes in DMF/HEPES aqueous buffer (7:3, v/v, 10mM, pH = 7.4) RE

Journal ArticleDOI
TL;DR: Copper oxide supported palladium nanoparticles have been used as a separable catalyst for the cyanation of a range of aryl iodides and bromides under ligand-free conditions as mentioned in this paper.

Journal ArticleDOI
TL;DR: In this paper, the catalytic activity of Glu-Fe3O4-SO3H was evaluated for three acid catalyzed reactions: etherification of 5-hydroxymethylfurfural (5-HMF), dehydration of sorbitol to isosorbide, and esterification of fatty acids with good yields and selectivity.

Journal ArticleDOI
TL;DR: An efficient and simple VO(acac)2-catalyzed approach to the synthesis of quinazolinones has been developed in this paper, which can also be scaled up.

Journal ArticleDOI
TL;DR: The binding association constant (Ka) of FLPY for Cu2+ based on a 1:1 stoichiometry was estimated to be 1.29 × 104 m−1 in the solution as mentioned in this paper.