Showing papers in "Chemistry Letters in 2013"
TL;DR: In this paper, the authors used diabloiodonium salts as aryl radical sources under visible light-mediated photoredox catalysis, and a range of heteroarenes were arylated with Ar2I+ in the presence of [Ir(ppy...
Abstract: Diaryliodonium salts have been used as aryl radical sources under visible light-mediated photoredox catalysis. Benzene and a range of heteroarenes are arylated with Ar2I+ in the presence of [Ir(ppy...
133 citations
TL;DR: In this paper, reduced graphene oxide (rGO) and reduced graphite oxide (RGtO) were analyzed by X-ray photoelectron spectroscopy and photochemical, electrochemical, hydrazine-assisted, a...
Abstract: Reduced graphene oxide (rGO) and reduced graphite oxide (rGtO) were analyzed by X-ray photoelectron spectroscopy. rGO and rGtO were prepared by photochemical, electrochemical, hydrazine-assisted, a...
92 citations
TL;DR: The selective synthesis of [6]-, [8]-, and [10] CPs was achieved by a new synthetic route involving Ni(0)-mediated coupling of bis(para-haloaryl)dinuclear arylplatinum complex as mentioned in this paper.
Abstract: The selective synthesis of [6]-, [8]-, and [10]cycloparaphenylenes (CPPs) was achieved by a new synthetic route involving Ni(0)-mediated coupling of bis(para-haloaryl)dinuclear arylplatinum complex...
86 citations
TL;DR: In this article, 1-Sulfonyl-1,2,3-triazoles undergo a Doyle-Kirmse reaction upon treatment with allylic sulfides in the presence of a rhodium(II) catalyst to afford α-allyl-α-sulfanylimines.
Abstract: 1-Sulfonyl-1,2,3-triazoles undergo a Doyle–Kirmse reaction upon treatment with allylic sulfides in the presence of a rhodium(II) catalyst to afford α-allyl-α-sulfanylimines. Terminal alkynes are re...
70 citations
TL;DR: In this paper, the luminescent copper(I) complexes have been extensively studied in recent decades with various ligands showing their rich photophysical and photochemical properties, such as luminescence and photophotonicity.
Abstract: Luminescent copper(I) complexes have been extensively studied in recent decades with various ligands showing their rich photophysical and photochemical properties. In this contribution, the lumines...
64 citations
TL;DR: In this article, the authors used spiropyran (SP) powder and transferred the liquid marbles to a Petri dish containing water and remained stable on the water surface for more than ten minutes.
Abstract: Photoresponsive liquid marbles were prepared using spiropyran (SP) powder. The liquid marbles were transferred to a Petri dish containing water and remained stable on the water surface for more tha...
59 citations
TL;DR: In this paper, several examples are given to discuss how to construct elaborate metallosupramolecular architectures using symmetrization self-assembly of symmetric building blocks.
Abstract: Desymmetrization self-assembly of symmetric building blocks is a powerful method to construct elaborate metallosupramolecular architectures. Herein several examples are given to discuss how to buil...
56 citations
TL;DR: Low-temperature reactions are a powerful approach to generate new transition metal oxides that are inaccessible by conventional high-treme reactions as discussed by the authors, and they have been shown to be a powerful technique to generate transition metal transition oxides.
Abstract: Low-temperature reactions are a powerful approach to generate new transition metal oxides that are inaccessible by conventional high-temperature reactions. In this review, we describe the recent pr...
56 citations
TL;DR: Arynes, generated in situ from o-(trimethylsilyl)aryl triflates by treatment with a fluoride, have been shown to react efficiently with various alkoxyphosphines via a mechanism similar to the Micha...
Abstract: Arynes, generated in situ from o-(trimethylsilyl)aryl triflates by treatment with a fluoride, have been shown to react efficiently with various alkoxyphosphines via a mechanism similar to the Micha...
53 citations
TL;DR: The improved Scholl reaction allows for direct cyclization of anthracene oligomers to give bisanthene, teranthene and quateranthene as discussed by the authors, as well as a variety of πexpanded bisanthenes.
Abstract: The improved Scholl reaction allows for the direct cyclization of anthracene oligomers to give bisanthene, teranthene, and quateranthene. Furthermore, a variety of π-expanded bisanthenes are obtain...
50 citations
TL;DR: In this article, an improved cobalt-based catalytic system was developed for the branched-selective addition of aromatic ketimines to styrenes, with an appropriate combination of triarylphosphine and the Grign...
Abstract: An improved cobalt-based catalytic system has been developed for the branched-selective addition of aromatic ketimines to styrenes. With an appropriate combination of triarylphosphine and the Grign...
TL;DR: In this article, entangled porous coordination frameworks, wherein two or more distinct frameworks are catenated over an entire crystal, are known to demonstrate unique structural flexibilities in response to the a...
Abstract: Entangled porous coordination frameworks, wherein two or more distinct frameworks are catenated over an entire crystal, are known to demonstrate unique structural flexibilities in response to the a...
TL;DR: Polyimide (PI) aerogels containing rigid-rod biphenyl, benzimidazole, and triphenylpyridine moieties have been developed as mentioned in this paper.
Abstract: Polyimide (PI) aerogels containing rigid-rod biphenyl, benzimidazole, and triphenylpyridine moieties have been developed. The flexible PI aerogels exhibited excellent thermal stability with glass-t...
TL;DR: In this article, the catalytic performance of a nickel complex stabilized by an oxygen-bridged bis(silylene) ligand was examined in cross-coupling reactions of aryl halides with organometallic compounds.
Abstract: In the present study the catalytic performance of a nickel complex stabilized by an oxygen-bridged bis(silylene) ligand was examined in cross-coupling reactions of aryl halides with organometallic ...
TL;DR: In this article, a 1,3-Dipolar cycloaddition reaction-based diversity-oriented synthesis developed from a research lab is highlighted, where the initial [3 + 2] cycloadding products are subjected to postcondensation mo...
Abstract: 1,3-Dipolar cycloaddition reaction-based diversity-oriented synthesis developed from our research lab is highlighted. The initial [3 + 2] cycloaddition products are subjected to postcondensation mo...
TL;DR: In this article, near-infrared (NIR)-responsive liquid marbles were prepared using carbon nanotube (CNT) and fullerene (C60) powders.
Abstract: Near-infrared (NIR)-responsive liquid marbles were prepared using carbon nanotube (CNT) and fullerene (C60) powders. The liquid marbles were transferred to the surface of bulk water. The liquid mar...
TL;DR: Takahara et al. as mentioned in this paper selectively hydrophobized halloysite nanotubelumens for loading with a retardant for controlled releasing composite materials.
Abstract: Inst itute for M cromanu actur ng, Lou sana Tech Un vers ty, Lou ana 71272, USA(Received October 28, 2012; CL-121098; E-mail: takahara@cstf.kyushu-u.ac.jp)We have selectively hydrophobized halloysite nanotubelumens for efficient loading with a flame retardant for controlledreleasing composite materials. The inner lumen of octadecyl-phosphonic-acid-modified halloysite was loaded with hydro-phobicbisphenol-A bis(diphenyl phosphate). This flameretardant was released from the clay nanotubes in linear fashionover 60h demonstrating the system potential utility as effectivenanocontainers for smart composite systems.There has been considerable interest in materials based onaluminum silicate nanotubes because of theirunique featuresand applications.
TL;DR: In this paper, the reaction of acetonitrile using primary alcohols is effectively catalyzed by [RuHCl(CO)(PPh3)3] in the presence of K3PO4 as a base.
Abstract: Alkylation reaction of acetonitrile using primary alcohols is effectively catalyzed by [RuHCl(CO)(PPh3)3] in the presence of K3PO4 as a base. Both benzylic and non-benzylic alcohols coupled with ac...
TL;DR: In this paper, high-molecular-weight head-to-tail-type regioregular polythiophenes are synthesized by [CpNiCl(SIPr)]-catalyzed dehydrobrominative polycondensation.
Abstract: High-molecular-weight head-to-tail-type regioregular polythiophenes are synthesized by [CpNiCl(SIPr)]-catalyzed dehydrobrominative polycondensation. Polycondensation of 2-bromo-3-hexylthiophene at ...
TL;DR: A novel synthetic route to optically active 1,3-oxazolidines via formal [3 + 2] cycloaddition in the presence of cinchona-alkaloid-thiourea-based bifunctional organocatalysts is reported.
Abstract: A novel synthetic route to optically active 1,3-oxazolidines via formal [3 + 2] cycloaddition in the presence of cinchona-alkaloid-thiourea-based bifunctional organocatalysts is reported. This prot...
TL;DR: In this article, a new reagent, N,N,N′, N′,N'',N '',N,'' N''-hexaoctylnitrilotriacetamide (NTAamide(C8)), was synthesized and examined for actinoid and lanthanoid extractions.
Abstract: New reagent, N,N,N′,N′,N′′,N′′-hexaoctylnitrilotriacetamide (NTAamide(C8)), was synthesized and examined for actinoid and lanthanoid extractions. NTAamide(C8) has one N atom and three carbonyl oxyg...
TL;DR: In this paper, the selective cross coupling of benzylic chlorides with aryl Grignard reagents was achieved by using catalytic amounts of FeCl2 and electronically tuned ortho-phenylenebisphosphine ligands.
Abstract: The selective cross coupling of benzylic chlorides with aryl Grignard reagents has been achieved by using catalytic amounts of FeCl2 and electronically tuned ortho-phenylenebisphosphine ligands. Al...
TL;DR: A naphthalene bisimide (NBI)-based donor-acceptor (D-A) alternating lowband-gap polymer was successfully synthesized by palladium-catalyzed direct aryl....
Abstract: A naphthalene bisimide (NBI)-based donor–acceptor (D–A) alternating low-band-gap polymer, which is an electron-transporting material, was successfully synthesized by palladium-catalyzed direct aryl...
TL;DR: In this article, AAM-masked arylboronic acids via Ru-catalyzed o-C-H silylation, followed by iododesilylation with ICl.
Abstract: Anthranilamide (AAM)-masked o-iodoarylboronic acids were prepared from AAM-masked arylboronic acids via Ru-catalyzed o-C–H silylation, followed by iododesilylation with ICl. The Suzuki–Miyaura coup...
TL;DR: The synthesis of spirooxindoles fused with cyclopropanes from carbamoyl chlorides, via methine C(sp3)–H activation, is reported, and the regioselectivity of C-H activation in the presence of competitiv...
Abstract: The synthesis of spirooxindoles fused with cyclopropanes from carbamoyl chlorides, via methine C(sp3)–H activation, is reported. The regioselectivity of C–H activation in the presence of competitiv...
TL;DR: Graphene oxide-alkylamine (GO-Cnamine; n = 0, 1, 2, 3, 4, 6, 8, 10, 12, 14, 16, and 18) hybrids were synthesized and found to be stable through bonding between the N-terminals of the amine precurso as mentioned in this paper.
Abstract: Graphene oxide–alkylamine (GO–Cnamine; n = 0, 1, 2, 3, 4, 6, 8, 10, 12, 14, 16, and 18) hybrids were synthesized and found to be stable through bonding between the N-terminals of the amine precurso...
TL;DR: In this paper, the electrophilic substitution reactions of sumanene were studied and they were selectively prepared with the separation of all regioisomers and the regioselectivity was investigated.
Abstract: Electrophilic substitution reactions of sumanene were studied. Mono-, di-, and trisubstituted sumanenes were selectively prepared with the separation of all regioisomers. The regioselectivity was p...
TL;DR: Cosensitization, a technique involving sensitization of a metal-oxide semiconductor electrode with two or more different dyes, is a promising strategy to enhance light-harvesting capabilities of dy...
Abstract: Cosensitization, a technique involving sensitization of a metal-oxide semiconductor electrode with two or more different dyes, is a promising strategy to enhance light-harvesting capabilities of dy...
TL;DR: A simple, practical, and efficient method for one-pot synthesis of symmetric and unsymmetrical 1,3-diarylisobenzofurans has been developed by sequential reactions of methyl 2-formylbenzoate with tw...
Abstract: A simple, practical, and efficient method for one-pot synthesis of symmetric and unsymmetrical 1,3-diarylisobenzofurans has been developed by sequential reactions of methyl 2-formylbenzoate with tw...
TL;DR: Derivatives of tris-fused TTF donors 3 extended with cyclohexene-1,4-diylidene were synthesized as discussed by the authors, and cyclic voltammetry revealed that the tetrakis(hexylthio)-3 (3c) exhibited three stages of a two-elec...
Abstract: Derivatives of tris-fused TTF donors 3 extended with cyclohexene-1,4-diylidene were synthesized. Cyclic voltammetry revealed that the tetrakis(hexylthio)-3 (3c) exhibited three stages of a two-elec...