Tag: M.W=250-300

James, Tony D. published the artcileA diboronic acid ‘glucose cleft’ and a biscrown ether ‘metal sandwich’ are allosterically coupled, Name: 2-(2-(Bromomethyl)phenyl)-5,5-dimethyl-1,3,2-dioxaborinane, the publication is Journal of the Chemical Society, Chemical Communications (1995), 1483-5, database is CAplus.

Glucose is released from the diboronic acid ‘cleft’ I when a metal ‘sandwich’ is formed by two 15-crown-5 rings; the binding events are sensitively monitored by changes in the fluorescence intensity.

Journal of the Chemical Society, Chemical Communications published new progress about 166821-88-1. 166821-88-1 belongs to bromides-buliding-blocks, auxiliary class Bromide,Boronic acid and ester,Benzyl bromide,Benzene,Boronic Acids,Boronic acid and ester, name is 2-(2-(Bromomethyl)phenyl)-5,5-dimethyl-1,3,2-dioxaborinane, and the molecular formula is C12H16BBrO2, Name: 2-(2-(Bromomethyl)phenyl)-5,5-dimethyl-1,3,2-dioxaborinane.

Referemce:
https://en.wikipedia.org/wiki/Bromide,
bromide – Wiktionary

James, Tony D. published the artcileA saccharide ‘sponge’. Synthesis and properties of a dendritic boronic acid, Related Products of bromides-buliding-blocks, the publication is Chemical Communications (Cambridge) (1996), 705-6, database is CAplus.

Very low concentrations of D-galactose and D-fructose are bound to a dendrimer containing eight boronic acids and eight anthracene units; the binding events are sensitively monitored by changes in the fluorescence intensity.

Chemical Communications (Cambridge) published new progress about 166821-88-1. 166821-88-1 belongs to bromides-buliding-blocks, auxiliary class Bromide,Boronic acid and ester,Benzyl bromide,Benzene,Boronic Acids,Boronic acid and ester, name is 2-(2-(Bromomethyl)phenyl)-5,5-dimethyl-1,3,2-dioxaborinane, and the molecular formula is C12H16BBrO2, Related Products of bromides-buliding-blocks.

Referemce:
https://en.wikipedia.org/wiki/Bromide,
bromide – Wiktionary

Nakanishi, Tatsuaki published the artcileSynthesis and optical properties of photovoltaic materials based on the ambipolar dithienonaphthothiadiazole unit, Related Products of bromides-buliding-blocks, the publication is Journal of Materials Chemistry A: Materials for Energy and Sustainability (2015), 3(8), 4229-4238, database is CAplus.

Dithieno[3’2′:5,6;2”,3”:7,8]naphtho[2,3-c][1,2,5]thiadiazole (DTNT) was designed to control the band energies of the polymers for photovoltaic materials. Electrochem. anal. showed that DTNT acts as both an electron donor and an electron acceptor, revealing the ambipolar nature of the DTNT unit. The direct arylation polymerization of DTNT with 2,2′-bithiophene (BTh) and 3,6-bis(2-thienyl)pyrrolo[3,4-c]pyrrole-1,4-dione (DPP) afforded 4 polymers that differed in either the unit of copolymerization or the chosen side chains. In the PDTNT-BTh series, a shoulder absorption band was observed at a longer wavelength than the intense absorption band. The PDTNT-DPP series exhibited a narrow band gap of <1.4 eV and a low HOMO energy of -5.43 eV. An organic photovoltaic cell that contained a PDTNT-BTh polymer with 2-ethylhexyl groups and [6,6]-phenyl-C₇₁-butyric acid Me ester (PC₇₁BM) as an active layer afforded the best performance among the studied compounds, with a J_SC of 6.98 mA cm^-3, a V_OC of 0.758 V, a FF of 0.52, and a PCE of 2.76%.

Journal of Materials Chemistry A: Materials for Energy and Sustainability published new progress about 303734-52-3. 303734-52-3 belongs to bromides-buliding-blocks, auxiliary class Thiophene,Bromide, name is 2-Bromo-3-(2-ethylhexyl)thiophene, and the molecular formula is C12H19BrS, Related Products of bromides-buliding-blocks.

Referemce:
https://en.wikipedia.org/wiki/Bromide,
bromide – Wiktionary

Lin, Po-Shen published the artcileControlled Synthesis of Poly[(3-alkylthio)thiophene]s and Their Application to Organic Field-Effect Transistors, Related Products of bromides-buliding-blocks, the publication is ACS Applied Materials & Interfaces (2021), 13(27), 31898-31909, database is CAplus and MEDLINE.

Regioregular polythiophenes have been widely used in organic electronic applications due to their solution processability with chem. modification through side chain engineering, as well as their microstructural organization and good hole transport properties. Here, we introduce alkylthio side chains, (poly[(3-alkylthio)thiophene]s; P3ATTs), with strong noncovalent sulfur mol. interactions, to main chain thienyl backbones. These P3ATTs were compared with alkyl-substituted polythiophene (poly(3-alkylthiophene); P3AT) variants such that the effects of straight (hexyl and decyl) and branched (2-ethylhexyl) side chains (with and without S atoms) on their thin-film morphologies and crystalline states could be investigated. P3ATTs with linear alkylthio side chains (P3HTT, hexylthio; P3DTT, decylthio) did not attain the expected higher organic field-effect transistor (OFET) mobilities with respect to P3HT (hexyl) and P3DT (decyl) mainly due to their lower regioregularity (76-78%), although P3ATTs exhibit an enhanced tendency for aggregation and compact mol. packing, as indicated by the red-shifting of the absorption spectra and the shortening of the π-π stacking distance, resp. Moreover, the loss of regioregularity issue can be solved by introducing more soluble 2-ethylhexylthio branched side chains to form poly[3-(2-ethylhexylthio)thiophene] (P3EHTT), which provides enhanced crystallinity and efficient charge mobility (increased by up to a factor of 3) with respect to the poly(2-ethylhexylthiophene) (P3EHT) without S atoms in the side moieties. This study demonstrates that the presence of side chain alkylthio structural motifs with nonbonded interactions in polythiophene semiconductors has a beneficial impact on the mol. conformation, morphologies, structural packing, and charge transport in OFET devices.

ACS Applied Materials & Interfaces published new progress about 303734-52-3. 303734-52-3 belongs to bromides-buliding-blocks, auxiliary class Thiophene,Bromide, name is 2-Bromo-3-(2-ethylhexyl)thiophene, and the molecular formula is C12H19BrS, Related Products of bromides-buliding-blocks.

Referemce:
https://en.wikipedia.org/wiki/Bromide,
bromide – Wiktionary

Turro, Nicholas J. published the artcileQuantum chain processes. Novel procedure for measurment of quenching parameters. Evidence that exothermic triplet-triplet energy transfer is not diffusion limited and an estimation of the efficiency of exothermic quenching in a solvent cage, Safety of 1,3-Dibromonaphthalene, the publication is Journal of the American Chemical Society (1974), 96(6), 1936-8, database is CAplus.

It is shown that quantum chain reactions involving tetramethyl-1,2-dioxetane (I) as the key quantum carrying reagent occur when I is thermolyzed in the presence of electronic energy acceptors. A kinetic scheme is derived to handle chemiluminescence quenching data. The data are used to disprove the common assumption that exothermic triplet-triplet energy transfer is diffusion limited.

Journal of the American Chemical Society published new progress about 52358-73-3. 52358-73-3 belongs to bromides-buliding-blocks, auxiliary class Bromide,Naphthalene, name is 1,3-Dibromonaphthalene, and the molecular formula is C6H5N3O, Safety of 1,3-Dibromonaphthalene.

Referemce:
https://en.wikipedia.org/wiki/Bromide,
bromide – Wiktionary

Lai, Thu Hang published the artcileDevelopment of ¹⁸F-labeled radiotracers for PET imaging of the adenosine A₂A receptor: synthesis, radiolabeling and preliminary biological evaluation, Quality Control of 76283-09-5, the publication is International Journal of Molecular Sciences (2021), 22(5), 2285, database is CAplus and MEDLINE.

The adenosine A2A receptor (A2AR) represents a potential therapeutic target for neurodegenerative diseases. Aiming at the development of a positron emission tomog. (PET) radiotracer to monitor changes of receptor d. and/or occupancy during the A2AR-tailored therapy, authors designed a library of fluorinated analogs based on a recently published lead compound (PPY). Among those, the highly affine 4-fluorobenzyl derivate (K_i(hA_2AR) = 5.3 nM) and the 2-fluorobenzyl derivate (K_i(hA_2AR) = 2.1 nM) were chosen for ¹⁸F-labeling via an alc. enhanced copper-mediated procedure starting from the corresponding boronic acid pinacol ester precursors. Investigations of the metabolic stability of compound I (R = p-¹⁸F, o-¹⁸F) in CD-1 mice by radio-HPLC anal. revealed parent fractions of more than 76% of total activity in the brain. Specific binding of I (R = o-¹⁸F)on mice brain slices was demonstrated by in vitro autoradiog. In vivo PET/magnetic resonance imaging (MRI) studies in CD-1 mice revealed a reasonable high initial brain uptake for both radiotracers, followed by a fast clearance.

International Journal of Molecular Sciences published new progress about 76283-09-5. 76283-09-5 belongs to bromides-buliding-blocks, auxiliary class Fluoride,Bromide,Benzyl bromide,Benzene, name is 4-Bromo-1-(bromomethyl)-2-fluorobenzene, and the molecular formula is C7H5Br2F, Quality Control of 76283-09-5.

Referemce:
https://en.wikipedia.org/wiki/Bromide,
bromide – Wiktionary

Yazaki, Kohei published the artcilePolycationic-shelled capsular and tubular nanostructures and anionic-guest binding properties, SDS of cas: 52358-73-3, the publication is Chemistry – A European Journal (2016), 22(49), 17557-17561, database is CAplus and MEDLINE.

For the development of novel nanospace with unique electrostatic character, we prepared new capsular and tubular nanostructures by the quant. assembly of metal ions and bent bisacridinium ligands. The capsule and tube have closed spherical and open cylindrical cavities, resp., with diameters of around 1 nm surrounded by cationic polyaromatic panels. Thanks to the facile synthetic protocol (three steps), another polycationic capsule with an elliptical nanocavity was also prepared by using an elongated ligand. In spite of the absence of pendant hydrophilic groups, the spherical polyaromatic capsule shows sufficient water solubility due to the polycationic shell. Moreover, the highly cationic cavity (12+) can selectively encapsulate anionic organic compounds in water.

Chemistry – A European Journal published new progress about 52358-73-3. 52358-73-3 belongs to bromides-buliding-blocks, auxiliary class Bromide,Naphthalene, name is 1,3-Dibromonaphthalene, and the molecular formula is C4H4OS, SDS of cas: 52358-73-3.

Referemce:
https://en.wikipedia.org/wiki/Bromide,
bromide – Wiktionary

Gong, Young-Dae published the artcileConstruction of 6-Amino-2,2-Dimethyl-3,4,6-Trisubstituted-2H-1-Benzopyran Library by Solid Phase Synthesis, COA of Formula: C7H5Br2F, the publication is Journal of Combinatorial Chemistry (2003), 5(5), 577-589, database is CAplus and MEDLINE.

A library of functionalized derivatives of aminodimethylbenzopyran I is prepared on solid support. Resin-bound p-hydroxybenzyl alc. is converted to its p-nitrophenyl carbonate; treatment with I yields resin-bound I. N-alkylation of resin-bound I followed by cleavage with trifluoroacetic acid in CH₂Cl₂ yields N-monoalkylated derivatives of I. Oxidation of the N-alkylated resin-bound I with m-chloroperbenzoic acid followed by addition of an alc. yields resin-bound dialkoxyaminobenzopyrans stereoselectively. Cleavage of the resin-bound dialkoxyaminobenzopyrans from the resin yields alkoxyaminobenzopyranols; alkylation with alkyl halides or acylation with acyl chlorides followed by cleavage from the resin yields either dialkoxyaminobenzopyrans or alkoxyaminobenzopyranol esters stereoselectively. The reactions of some of the resin-bound intermediates are monitored by ATR-FT-IR and HR-MAS-NMR spectroscopy.

Journal of Combinatorial Chemistry published new progress about 76283-09-5. 76283-09-5 belongs to bromides-buliding-blocks, auxiliary class Fluoride,Bromide,Benzyl bromide,Benzene, name is 4-Bromo-1-(bromomethyl)-2-fluorobenzene, and the molecular formula is C7H5Br2F, COA of Formula: C7H5Br2F.

Referemce:
https://en.wikipedia.org/wiki/Bromide,
bromide – Wiktionary

James, Tony D. published the artcileNovel saccharide-photoinduced electron transfer sensors based on the interaction of boronic acid and amine, Category: bromides-buliding-blocks, the publication is Journal of the American Chemical Society (1995), 117(35), 8982-7, database is CAplus.

Two boronic acid systems, monoboronic acid 3 and diboronic acid 8, were synthesized. When saccharides form cyclic boronate esters with these boronic acids, the Lewis acid-base interaction between the boronic acid moiety and tertiary amine is strengthened; when saccharides form cyclic boronate esters with boronic acids the acidity of the boronic acid is enhanced. The strength of this acid-base interaction modulates the photoinduced electron transfer (PET) from the amine to anthracene. Both of these compounds show increased fluorescence at pH 7.77 through suppression of the photoinduced electron transfer from nitrogen to anthracene on saccharide binding, a direct result of the stronger boron-nitrogen bond. Compound 3 shows the typical selectivity of monoboronic acids towards saccharides. Compound 8 which has a cleftlike structure is particularly selective and sensitive for glucose due to the formation of an intramol. 1:1 complex between the two boronic acids and the 1,2- and 4,6-hydroxyls of glucose. This is the first example in which ditopic recognition of monosaccharides is achieved in a PET sensor system.

Journal of the American Chemical Society published new progress about 166821-88-1. 166821-88-1 belongs to bromides-buliding-blocks, auxiliary class Bromide,Boronic acid and ester,Benzyl bromide,Benzene,Boronic Acids,Boronic acid and ester, name is 2-(2-(Bromomethyl)phenyl)-5,5-dimethyl-1,3,2-dioxaborinane, and the molecular formula is C12H16BBrO2, Category: bromides-buliding-blocks.

Referemce:
https://en.wikipedia.org/wiki/Bromide,
bromide – Wiktionary

Dhungana, Roshan K. published the artcileNi-catalyzed regioselective 1,2-dialkylation of alkenes enabled by the formation of two C(sp³)-C(sp³) bonds, Formula: C12H16BBrO2, the publication is Journal of the American Chemical Society (2020), 142(50), 20930-20936, database is CAplus and MEDLINE.

The authors disclosed a Ni-catalyzed vicinal difunctionalization of alkenes with benzyl halides and alkylzinc reagents, which produces products with two new alkyl-alkyl bonds. This alkene dialkylation is effective in combining secondary benzyl halides and secondary alkylzinc reagents with internal alkenes, which furnishes products with three contiguous all-carbon secondary stereocenters. The products can be readily elaborated to access complex tetraene, benzosuberene, and bicyclodecene cores. The reaction also features as the most efficient alkene difunctionalization process to date with catalyst loadings down to 500 ppm and the catalytic turnover number (TON) and turnover frequency (TOF) registering up to 2 x 10³ and 165 h^-1 at rt, resp.

Journal of the American Chemical Society published new progress about 166821-88-1. 166821-88-1 belongs to bromides-buliding-blocks, auxiliary class Bromide,Boronic acid and ester,Benzyl bromide,Benzene,Boronic Acids,Boronic acid and ester, name is 2-(2-(Bromomethyl)phenyl)-5,5-dimethyl-1,3,2-dioxaborinane, and the molecular formula is C12H16BBrO2, Formula: C12H16BBrO2.

Referemce:
https://en.wikipedia.org/wiki/Bromide,
bromide – Wiktionary