Month: December 2022

Fan, Pei published the artcileAcylation of Aryl Halides and α-Bromo Acetates with Aldehydes Enabled by Nickel/TBADT Cocatalysis, Quality Control of 401-55-8, the publication is Organic Letters (2020), 22(10), 3875-3878, database is CAplus and MEDLINE.

In this protocol aryl halides and α-bromo esters were efficiently cross-coupled with an array of aromatic and aliphatic aldehydes under the cooperative catalysis of nickel and tetrabutylammonium decatungstate as a hydrogen-atom-transfer photocatalyst. This method provided a concise approach to a variety of ketones with high compatibility of various functional groups.

Organic Letters published new progress about 401-55-8. 401-55-8 belongs to bromides-buliding-blocks, auxiliary class Fluoride,Bromide,Aliphatic hydrocarbon chain,Ester, name is Ethylbromofluoroacetate, and the molecular formula is C4H6BrFO2, Quality Control of 401-55-8.

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

Zeng, Xiao-Lan published the artcileQSPR study on octanol/water partition coefficient (lgK_ow) of substituted naphthalin compounds, Recommanded Product: 1,3-Dibromonaphthalene, the publication is Chinese Journal of Structural Chemistry (2007), 26(3), 281-286, database is CAplus.

Structural parameters of 24 substituted naphthalin compounds were computed at four levels using Hartree-Fock and DFT methods. Based on the exptl. data of octanol/water partition coefficient (lgK_ow), three-parameter (energy of the HOMO (E_HOMO), the most pos. at. net charges of mol. (q⁺) and mol. average polarizability (α)) dependent equations were developed using structural parameters as theor. descriptors. Especially, lgK_ow dependent equation calculated at the HF/6-311G** level is more advantageous than others in view of their correlation and predictive abilities. This dependent equation was validated by variance inflation factors (VIF) and t-test methods and used to predict lgK_ow of eight designed compounds Upon comparison, the predictive abilities of our work are all more advantageous than those calculated from mol. property calculator program.

Chinese Journal of Structural Chemistry 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 C6H5BN2O3, Recommanded Product: 1,3-Dibromonaphthalene.

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

Nova, Nabila Nabi published the artcileDirect laser writing of graphitic carbon from liquid precursors, Application of 1-Bromododecane, the publication is Chemistry of Materials (2022), 34(10), 4602-4612, database is CAplus.

One-step synthesis and micropatterning of different types of carbon nanomaterials, such as amorphous carbon or three-dimensional graphene which have versatile electrochem., thermal, and mech. properties, are advantageous for the fabrication of microelectronics, sensors, and wearable devices. Here, we report a direct laser writing method to simultaneously synthesize and pattern graphitic carbon from liquid organic precursors. We have tested a wide range of liquid organic precursors and identified the chem. characteristics that are beneficial for successful laser-induced solvothermal deposition. The laser-deposited carbon exhibits a paracryst.-to-polycrystalline structure and has elec. resistivities on the order of 10^-3 to 10^-4 Ω m which is tunable through variations in the laser power. Such properties of the laser-deposited carbon, coupled with the ability to direct-write custom patterns with microscale resolution, make these carbon materials exciting candidates for use in applications such as energy storage and sensing.

Chemistry of Materials published new progress about 143-15-7. 143-15-7 belongs to bromides-buliding-blocks, auxiliary class Bromide,Aliphatic hydrocarbon chain, name is 1-Bromododecane, and the molecular formula is C12H25Br, Application of 1-Bromododecane.

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

Nova, Nabila Nabi published the artcileDirect laser writing of graphitic carbon from liquid precursors, Application In Synthesis of 111-83-1, the publication is Chemistry of Materials (2022), 34(10), 4602-4612, database is CAplus.

One-step synthesis and micropatterning of different types of carbon nanomaterials, such as amorphous carbon or three-dimensional graphene which have versatile electrochem., thermal, and mech. properties, are advantageous for the fabrication of microelectronics, sensors, and wearable devices. Here, we report a direct laser writing method to simultaneously synthesize and pattern graphitic carbon from liquid organic precursors. We have tested a wide range of liquid organic precursors and identified the chem. characteristics that are beneficial for successful laser-induced solvothermal deposition. The laser-deposited carbon exhibits a paracryst.-to-polycrystalline structure and has elec. resistivities on the order of 10^-3 to 10^-4 Ω m which is tunable through variations in the laser power. Such properties of the laser-deposited carbon, coupled with the ability to direct-write custom patterns with microscale resolution, make these carbon materials exciting candidates for use in applications such as energy storage and sensing.

Chemistry of Materials published new progress about 111-83-1. 111-83-1 belongs to bromides-buliding-blocks, auxiliary class Bromide,Aliphatic hydrocarbon chain, name is 1-Bromooctane, and the molecular formula is C8H17Br, Application In Synthesis of 111-83-1.

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

Tzerpos, Nikolaos I. published the artcileDiphenylpyridylmethyl radicals. Part 1. Synthesis, dimerization and ENDOR spectroscopy of diphenyl(2-, 3- or 4-pyridyl)methyl radicals; bond dissociation enthalpies of their dimers, Formula: C6H12Br2, the publication is Journal of the Chemical Society, Perkin Transactions 2: Physical Organic Chemistry (1995), 755-61, database is CAplus.

Ortho-ortho hydrogen van der Waals repulsions are the origin of the propeller shape of the triphenylmethyl radical and the main reason for the low bond dissociation enthalpy (BDH) of its dimer I (44.8 J mol^-1). In order to reduce these steric repulsions (eliminating some aromatic hydrogens), diphenyl(2-, 3- or 4-pyridyl)methyl radicals (e.g, II) were prepared through reductive dehalogenation of the corresponding triarylchloromethanes (e.g., III) with silver in benzene. They form α,p-dimers IV–VI exclusively through the pyridine ring. ENDOR spectroscopy shows that the structure of the radicals, does not deviate substantially from that of the parent radical, Ph₃C•. In contrast, the BDH values of the dimers (measured using ESR spectroscopy) show strengthening of the central C-C bond in IV (88.7 kJ mol^-1) and V (90.0 kJ mol^-1) and a similar value for VI (46.4 kJ mol^-1) with respect to the trityl dimer I. This is a consequence of the ground state stabilization of the dimers IV–VI due to relief of strain (elimination of ring hydrogens), whereas in the case of VI, this stabilization is probably compensated by the formation of a weaker C-N bond with respect to the C-C bond. The above dimers undergo easy 1,5-H-rearrangement, autocatalyzed by the basic pyridyl groups themselves.

Journal of the Chemical Society, Perkin Transactions 2: Physical Organic Chemistry published new progress about 594-81-0. 594-81-0 belongs to bromides-buliding-blocks, auxiliary class Bromide,Aliphatic hydrocarbon chain, name is 2,3-Dibromo-2,3-dimethylbutane, and the molecular formula is C11H24O3, Formula: C6H12Br2.

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

Huang, Qi published the artcileInexpensive Radical Methylation and Related Alkylations of Heteroarenes, SDS of cas: 401-55-8, the publication is Organic Letters (2018), 20(5), 1413-1416, database is CAplus and MEDLINE.

A simple method for the introduction of a Me and higher aliphatic group to various heteroarenes using very inexpensive reagents is described. It is based on the radical addition of a carboxylic xanthate followed by decarboxylation. Depending on the heteroarene structure, the decarboxylation can be spontaneous or induced by heating in N,N-dimethylacetamide or N-Me pyrrolidone in a microwave oven.

Organic Letters published new progress about 401-55-8. 401-55-8 belongs to bromides-buliding-blocks, auxiliary class Fluoride,Bromide,Aliphatic hydrocarbon chain,Ester, name is Ethylbromofluoroacetate, and the molecular formula is C4H6BrFO2, SDS of cas: 401-55-8.

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

Tang, Luning published the artcileReductive Opening of Oxetanes Catalyzed by Frustrated Lewis Pairs: Unexpected Aryl Migration via Neighboring Group Participation, Recommanded Product: 1-Bromododecane, the publication is Organic Letters (2022), 24(17), 3259-3264, database is CAplus and MEDLINE.

B(C₆F₅)₃ was found to catalyze an unusual double reduction of oxetanes by hydrosilane with aryl migration via neighboring group participation. Control experiments suggested that the phenonium ion serves as the key intermediate. Minor modification of this protocol also led to simple hydrosilylative opening of oxetanes.

Organic Letters published new progress about 143-15-7. 143-15-7 belongs to bromides-buliding-blocks, auxiliary class Bromide,Aliphatic hydrocarbon chain, name is 1-Bromododecane, and the molecular formula is C14H10O4, Recommanded Product: 1-Bromododecane.

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

Caldirola, P. published the artcileNew prenylamine-analogs: investigations of their influence on calcium-dependent biological systems, Quality Control of 1997-80-4, the publication is European Journal of Medicinal Chemistry (1993), 28(7-8), 555-68, database is CAplus.

Chem., prenylamine belongs to the diphenylalkylamine class. Compounds of this class are calcium antagonists with a broad spectrum of activities due to their influence on both extracellular and intracellular sites. In the present study the calcium antagonistic profile of a recently developed new series of prenylamine analogs has been investigated using different in vitro systems. The inhibiting concentrations for the most active compound are ≈ 1.5 μM; several derivatives are inactive up to a concentration of 10 μM. Structural modifications towards an increase of lipophilicity make these mols. interact (inhibition) with the intracellular calcium-binding protein calmodulin; for the series no correlation between calcium-blocking and calmodulin antagonistic effects has been found.

European Journal of Medicinal Chemistry published new progress about 1997-80-4. 1997-80-4 belongs to bromides-buliding-blocks, auxiliary class Trifluoromethyl,Fluoride,Bromide,Benzene, name is 1-(2-Bromoethyl)-3-(trifluoromethyl)benzene, and the molecular formula is C9H8BrF3, Quality Control of 1997-80-4.

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

Caporusso, Anna Maria published the artcileStereoselective Synthesis of Chiral 3-Aryl-1-alkynes from Bromoallenes and Heterocuprates, Synthetic Route of 69361-41-7, the publication is Journal of Organic Chemistry (2006), 71(5), 1902-1910, database is CAplus and MEDLINE.

The synthesis of racemic and chiral 3-aryl-1-alkynes HCCCR¹R²R³ (R¹ = H, Me; R² = Me, Et, Me₃C; R³ = Ph, 2-EtC₆H₄, 4-MeOC₆H₄, 1-naphthyl, etc.) via cross-coupling of 3-alkyl- and 3,3-dialkyl-1-bromo-1,2-dienes R¹R²C:C:CHBr and arylbromocuprates (R³CuBr)MgBr·LiBr was examined With phenylcopper reagents and its para-substituted derivatives, as well as with 2-naphthyl cuprates, the reaction gave 3-aryl-1-alkynes with high regioselectivity and in good yields. On the contrary, when ortho-substituted Ph reagents and 1-naphthyl cuprates were used, the regioselectivity of the process was very dependent upon the steric requirements of the alkyl substituents on the bromoallenic substrate. When the steric bulk was increased, remarkable quantities of isomeric arylallenes R¹R²C:C:CHR³ were also observed in the reaction mixtures The high 1,3-anti stereoselectivity of the coupling process allowed us to obtain enantiomerically enriched 3-aryl-1-alkynes from optically active allenic substrates, thus indicating a simple pathway toward the synthesis of quaternary stereogenic centers characterized by an aryl group. A possible cross-coupling mechanism was also suggested to explain the regio- and stereochem. data. For the preparation of ω-functionalized 3-phenyl-1-alkynes R⁴CHPhCCH [R⁴ = H₂C:CH(CH₂)₂, Me₃SiCC(CH₂)₂, HO(CH₂)₃], the reaction of 1-bromo-3-phenylpropadiene with Knochel reagents R⁵Cu(CN)ZnCl·2LiCl [R⁵ = H₂C:CH(CH₂)₂, Me₃SiCC(CH₂)₂, ClMgO(CH₂)₃] was also studied; this reaction led to the acetylenic compounds in high yields mainly when the R⁵ group on the copper reagent was primary.

Journal of Organic Chemistry published new progress about 69361-41-7. 69361-41-7 belongs to bromides-buliding-blocks, auxiliary class PROTAC Linker,Aliphatic Linker, name is (4-Bromobut-1-yn-1-yl)trimethylsilane, and the molecular formula is C7H13BrSi, Synthetic Route of 69361-41-7.

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

Grand, Caroline published the artcileMorphology Control in Films of Isoindigo Polymers by Side-Chain and Molecular Weight Effects, Category: bromides-buliding-blocks, the publication is ACS Applied Materials & Interfaces (2017), 9(15), 13357-13368, database is CAplus and MEDLINE.

The performance of devices relying on organic electronic materials, such as organic field-effect transistors (OFET) and organic photovoltaics (OPV), is strongly correlated to the morphol. of the conjugated material in thin films. For instance, several factors such as polymer solubility, weak intermol. forces between polymers and fullerene derivatives, and film drying time impact phase separation in the active layer of a bulk heterojunction OPV device. In an effort to probe the influence of polymer assembly on morphol. of polymer thin films and phase separation with fullerene derivatives, five terthiophene-alt-isoindigo copolymers were synthesized with alkyl side-chains of varying lengths and branching on the terthiophene unit. These P[T3(R)-iI] polymers were designed to have similar optoelectronic properties but different solubilities in o-dichlorobenzene and were predicted to have different tendencies for crystallization All polymers with linear alkyl chains exhibit similar thin film morphologies as investigated by grazing-incidence wide-angle X-ray scattering (GIWAXS) and at. force microscopy (AFM). The main differences in electronic and morphol. properties arise when P[T3(R)-iI] is substituted with branched 2-ethylhexyl (2EH) side-chains. The bulky 2EH substituents lead to a blue-shifted absorption, a lower ionization potential, and reduced ordering in polymer thin films. The five P[T3-iI] derivatives span hole mobilities from 1.5 × 10^-3 to 2.8 × 10^-2 cm² V^-1 s^-1 in OFET devices. In OPV devices, the 2EH-substituted polymers yield open-circuit voltages of 0.88 V in BHJ devices yet low short-circuit currents of 0.8 mA cm^-2, which is explained by the large phase separation observed by AFM in blends of P[T3(2EH)-iI] with PC₇₁BM. In these P[T3(R)-iI] systems, the propensity for the polymers to self-assemble prior to aggregation of PC₇₁BM mols. was key to achieving fine phase separation and increased short-circuit currents, eventually resulting in power conversion efficiencies of 5% in devices processed using a single solvent.

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, Category: bromides-buliding-blocks.

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