A series of C(3)-symmetric pi-conjugated compounds containing three to six o-carborane clusters have been synthesized by employing palladium-catalyzed Suzuki coupling reactions and acetylation reactions, followed silicon tetrachloride mediated trimerization reactions. Carborane-containing extended trimers were found emit blue light. Incorporation into systems led 22-70% enhancement their relative fluorescence quantum yields. Decapitation made these water soluble, aqueous solutions also be...

Robust three-dimensional structure, aromaticity, high chemical and thermal stability of polyhedral boron clusters make them promising candidates for use in materials science. Boron have been used the synthesis luminescent materials, polymers, coordination polymers or metal–organic frameworks, dendrimers, liquid crystals, nonlinear optical materials. Some these as molecular building blocks nanoscience. This review summarizes applications

The ability of ortho-, meta- and para-carboranes to enhance the emission intensity has been compared. For this purpose a series carborane-appended 1,3,5-triphenylbenzene (TB) 1,3,5- tris(biphenyl-4-yl)benzene (TBB) containing three para-carborane clusters directly attached conjugated cores have synthesized employing Suzuki, Heck, trimerization reactions. incorporation icosahedral carboranes was associated with red shift in UV absorption spectrum up 13 nm as well enhancements intensities...

Symmetrical star-shaped molecules with carborane clusters on the periphery have been synthesized in good yields via silicon tetrachloride mediated cyclotrimerization reactions of 9-benzyl derivatives carboranes acetyl group substitution benzene ring. Facile functionalization these symmetrical core structures 1-iodoheptane and trivinylchlorosilane produce compounds which could be used as liquid crystalline substances precursors for synthesis higher order carbosilane dendrons.

Phenylene-cored small dendrimers containing three to nine peripheral o-carborane clusters were synthesized via Cu(I)-catalyzed Huisgen-type azide alkyne cycloaddition reactions. The resulting have been characterized by IR and NMR spectroscopy MALDI-TOF mass spectral analysis. biological evaluation of branched dendrimer 16 carborane cages has carried out using human liver cancer cells (SK-Hep1). Dendrimer was accumulated in the SK-Hep1 a concentration-dependent manner. highest boron...

The synthesis and thermal properties of phenylene triazine core based symmetrical macromolecules containing three to six cobaltabis(dicarbollide) clusters are reported. zwitterionic oxonium derivative cobaltabis(dicarbollide), [3,3′-Co(8-C4H8O2-1,2-C2B9H10)(1′,2′-C2B9H11)], has been used for the synthetic transformations, silicon tetrachloride triflic acid were as cyclotrimerization reagents. Compounds multiple found be extremely thermally stable, only a 10−30% mass loss occurred up 700 °C.

The advancements in the synthetic chemistry of carboranes and metallacarboranes have given rise to diversified uses medicinal chemistry, resulting many new medical applications. An overview is presented emphasizing use nanoparticles, dendrimers, porphyrins carbohydrates as boron carriers. A review with 80 references.

Large dendrimers, noted G(n)-3(n+2)cage, containing 3(n+2) o-carborane cluster cages MeC(2)B(10)H(10) at their peripheries (n = number of generation G(n)) have been synthesized by Huisgen-type azide alkyne Cu(I)-catalyzed dipolar "click" cycloaddition reactions (CuAAC) between an monomeric ethynyl group and arene-centered azido-terminated dendrimers G(n)-3(n+2)N(3) generations 0, 1, 2. Attempts to synthesize higher-generation this family yielded insoluble materials. The carborane G(0)-9cage,...

A series of carborane-appended 5-thio-D-glucopyranose (5-TDGP) derivatives containing one to two 5-TDGP moieties were synthesized via click cycloaddition reaction as well following the traditional methods. Among carboranyl-5-TDGP derivatives, decapitated nido-carboranyl derivative 18 was found be highly water-soluble and therefore its preliminary biodistribution study conducted. comparative biological evaluation 18versus carboranyl-D-glucopyranose analog 19 with human hepatocellular...

The facile synthesis of a thermally stable carborane appended symmetrical star-shaped molecule having six bulky o-carborane clusters on the periphery, thereby containing sixty boron atoms was accomplished via cobalt-catalyzed [2 + 2 2] cycloaddition reaction.

Borylative fusion of BSe and BTz containing donor–acceptor oligomers gives fused boracycles with a reduction in the energy LUMO by up to 0.65 eV. This leads red shift emission <italic>ca.</italic> 200 nm use these materials for fabrication NIR OLEDs.

Diels–Alder reactions have been accomplished with ethylene as the dienophile through use of inverse-electron demand chemistry. As a key aspect chemistry, dienes are part tri- or dicationic superelectrophilic systems. Theoretical calculations reveal that highly charged superelectrophiles possess exceptionally low lying LUMOs, and this facilitates cycloaddition chemistry ethylene. The has used to prepare series tetrahydroquinoline products. This represents first application activation in...

Coke oven wastewater containing high concentrations of phenol and chemical oxygen demand (COD) was collected from a local steel plant Odisha. The treatment coke carried out by using Mobil Composition Matter No. 41 (MCM-41) nanoadsorbent. effect various adsorption parameters, such as temperature (°C), initial pH, agitation speed (rpm), MCM-41 dosage (g/L) on investigated two-level factorial experimental design. Enhancing had positive the performance, whereas with increasing negative removal...

Boron-rich dendritic glycoconjugates of ortho -carborane clusters containing three to six peripheral hydrophilic glucose moieties have been found be promising anticancer agents.

Abstract o ‐Carborane was covalently linked to the side chain of a polystyrene polymer by “click” reaction provide acarborane‐appended polymer. The initial step involved radical polymerization p ‐chloromethylstyrene with AIBN followed replacement chloro units azido groups; final employed Cu I ‐catalyzedHuisgen‐type between azidomethyl‐appended and ethynyl‐terminated carborane unit yielding desired carborane‐appended polystyrene. Size exclusion chromatography (SEC) this showed polydispersity...

This manuscript describes the development of a remarkably general palladium-catalyzed monoacylation carbazoles using toluene derivatives playing dual role acyl source and organic solvent. The method uses NHPI as cocatalyst oxygen sole oxidant. Interestingly, acylation monosubstituted N-pyridylcarbazoles takes place regioselectively at C-8 position. scope is explored aldehyde source. highly site-selective proceeds through radical process.

The role of carborane clusters in organometallic chemistry is diverse. A number cage systems such as C(2)B(4), C(2)B(9) and C(2)B(10) have been extensively used for the synthesis numerous metallacarboranes s, p, d f-block elements. An introduction to provided with an emphasis on recent advances

In the reactions of 2,3-pyrazinedicarboxylic anhydride with amines and anilines, pyrazine carboxamides are formed in good to excellent yields. A mechanism is proposed involving ring opening decarboxylation heterocyclic ring. Based on other similar decarboxylations, this suggests involvement an N-heterocyclic carbene intermediate leading product.

ADVERTISEMENT RETURN TO ISSUEPREVNoteNEXTCarboranylpyrroles: A Synthetic InvestigationRashmirekha Satapathy†, Barada Prasanna Dash†, Chong Zheng†, John A. Maguire‡, and Narayan S. Hosmane*†View Author Information† Department of Chemistry Biochemistry, Northern Illinois University, DeKalb, 60115-2862, United States‡ Chemistry, Southern Methodist Dallas, Texas 75275-0314, States *Email: [email protected]Cite this: J. Org. Chem. 2011, 76, 9, 3562–3565Publication Date (Web):March 16,...