Tag: M.W=200-250

Cho, Nam Sung published the artcileSynthesis, characterization, and electroluminescence of new conjugated polyfluorene derivatives containing various dyes as comonomers, Name: 1-((2-Ethylhexyl)oxy)-4-methoxybenzene, the publication is Macromolecules (2004), 37(14), 5265-5273, database is CAplus.

Four new fluorene-based alternating polymers (PFR1-S, PFR2-S, PFR3-S, and PFR4-S) containing different comonomers, i.e., 2,5-bis{2-(4′-bromophenyl)-1-cyanovinyl}-2-(2′-ethylhexyloxy)-5-methoxybenzene (R1), 2,5-bis{2-(4′-bromophenyl)-2-cyanovinyl}-2-(2′-ethylhexyloxy)-5-methoxybenzene (R2), 2,5-bis{2-(4′-bromothienyl)-1-cyanovinyl}-2-(2′-ethylhexyloxy)-5-methoxybenzene (R3), and 2,5-bis{2-(4′-bromothienyl)-2-cyanovinyl}-2-(2′-ethylhexyloxy)-5-methoxybenzene (R4), were designed, synthesized, and characterized. These polymers were thermally stable and readily soluble in common organic solvents. Single layer LED devices fabricated from these polymers emitted bluish green to pure red light. The color of the light emitted by the homopolymer, poly(9,9-dioctylfluorene-2,7-diyl) (PDOF), can be tuned by incorporating R1, R2, R3, and R4 comonomers, which have narrower band gaps. The absorption and emission maxima of the copolymers varied according to the position of the cyano group in the vinylene unit (α- or β-position) and the type of incorporated aromatic group (thiophene or phenylene). Notably, PFR4-S, prepared from R4 and 2,7-bis(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-9,9′-dioctylfluorene, showed pure red emission (CIE coordinate values x, y = 0.66 and 0.33, resp.) that is almost identical to the standard red (0.66, 0.34) demanded by the National Television System Committee. PFR3-S also exhibited pure red emission (chromaticity values x, y = 0.63 and 0.38, resp.), and its maximum luminance and maximum external quantum efficiency were approx. 3100 cd/m² at 6 V and 0.46% at 4 V, resp.

Macromolecules published new progress about 146370-51-6. 146370-51-6 belongs to ethers-buliding-blocks, auxiliary class Benzene,Ether, name is 1-((2-Ethylhexyl)oxy)-4-methoxybenzene, and the molecular formula is C15H24O2, Name: 1-((2-Ethylhexyl)oxy)-4-methoxybenzene.

Referemce:
https://en.wikipedia.org/wiki/Ether,
Ether | (C2H5)2O – PubChem

Tobisu, Mamoru published the artcileIridium/N-heterocyclic carbene-catalyzed C-H borylation of arenes by diisopropylaminoborane, Name: 2-(5-Methoxythiophen-2-yl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane, the publication is Beilstein Journal of Organic Chemistry (2016), 654-661, database is CAplus and MEDLINE.

Catalytic C-H borylation of arenes has been widely used in organic synthesis because it allows the introduction of a versatile boron functionality directly onto simple, unfunctionalized arenes. Authors report herein the use of diisopropylaminoborane as a boron source in C-H borylation of arenes. An iridium(I) complex with 1,3-dicyclohexylimidazol-2-ylidene is found to efficiently catalyze the borylation of arenes and heteroarenes. The resulting aminoborylated products can be converted to the corresponding boronic acid derivatives simply by treatment with suitable diols or diamines.

Beilstein Journal of Organic Chemistry published new progress about 596819-12-4. 596819-12-4 belongs to ethers-buliding-blocks, auxiliary class Thiophene,Boronic acid and ester,Ether,Boronate Esters,Boronic acid and ester, name is 2-(5-Methoxythiophen-2-yl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane, and the molecular formula is C6H8BNO3, Name: 2-(5-Methoxythiophen-2-yl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane.

Referemce:
https://en.wikipedia.org/wiki/Ether,
Ether | (C2H5)2O – PubChem

Hikawa, Hidemasa published the artcileA borrowing hydrogen methodology: palladium-catalyzed dehydrative N-benzylation of 2-aminopyridines in water, Formula: C13H14N2O, the publication is Green Chemistry (2018), 20(13), 3044-3049, database is CAplus.

A greener borrowing hydrogen methodol. using the π-benzylpalladium system, which offered an efficient and environmentally friendly preparation of N-benzyl aminopyridines I [R¹ = H, 5-F, 3-Me, etc.; R² = H, 3-Me, 4-t-BuO, etc.; R³ = H, Me] via dehydrative N-monobenzylation of 2-aminopyridines with benzylic alcs. in the absence of base was demonstrated. The crossover experiment using benzyl-α,α-d₂ alc. and 3-methylbenzyl alc. afforded H/D scrambled products, suggesting that the dehydrative N-benzylation in the catalytic system involved a borrowing hydrogen pathway. KIE experiments showed that C-H bond cleavage at the benzylic position of benzyl alc. was involved in the rate-determining step (KIE = 2.9). This simple base-free protocol could be achieved under mild conditions in an atom-economic process, affording the desired products in moderate to excellent yields.

Green Chemistry published new progress about 52818-63-0. 52818-63-0 belongs to ethers-buliding-blocks, auxiliary class Pyridine,Amine,Benzene,Ether, name is N-(4-Methoxybenzyl)pyridin-2-amine, and the molecular formula is C13H14N2O, Formula: C13H14N2O.

Referemce:
https://en.wikipedia.org/wiki/Ether,
Ether | (C2H5)2O – PubChem

Pfeiffer, Steffen published the artcileInvestigation of poly(arylenevinylene)s. Part 41. Synthesis of soluble dialkoxy-substituted poly(phenylene alkenylidene)s by applying the Horner-reaction for condensation polymerization, Synthetic Route of 146370-51-6, the publication is Macromolecular Chemistry and Physics (1999), 200(8), 1870-1878, database is CAplus.

Soluble poly[2-methoxy-5-(2-ethylhexyloxy)-1,4-phenylene-1,2-ethenylene] (MEH-PPV) and its alternating copolymer poly[2,5-dimethoxy-1,4-phenylene-1,2-ethenylene-2-methoxy-5-(2-ethylhexyloxy)-1,4-phenylene-1,2-ethenylene] (M3EH-PPV) were successfully synthesized by condensation polymerization of substituted terephthalaldehydes with substituted xylylene bisphosphonates via the Horner reaction. This polycondensation method was also applied to the synthesis of the analogous poly[2-methoxy-5-(2-ethylhexyloxy)-1,4-phenylene-1,3-butadiene-1,4-diyl] (MEH-PPB), which contains a 1,3-butadiene instead of a vinylene unit. The optical data of MEH-PPV and M3EH-PPV (solid film, absolute λ_max 484, em. λ_max 589 nm) are consistent with those previously reported for MEH-PPV from the dehydrohalogenation route. In comparison to MEH-PPV, the longer alkenylene sequence of MEH-PPB exhibits a slight red shift in its absorption and fluorescence spectra (absolute λ_max 502, em. λ_max 604 nm). All 3 poly(phenylene alkenylidene)s (MEH-PPV, M3EH-PPV, and MEH-PPB) are completely soluble in common solvents. They are well-defined conjugated polymers of high mol. weight (M̅_w > 20,000) and possess all-trans structure. Optical quality solid films are easily prepared from these polymers by solution processing. Blends with phenyl-substituted PPV derivatives can also be prepared in this way. This combination of properties is highly desirable for many light-emitting, nonlinear optical, and photoelec. applications.

Macromolecular Chemistry and Physics published new progress about 146370-51-6. 146370-51-6 belongs to ethers-buliding-blocks, auxiliary class Benzene,Ether, name is 1-((2-Ethylhexyl)oxy)-4-methoxybenzene, and the molecular formula is C15H24O2, Synthetic Route of 146370-51-6.

Referemce:
https://en.wikipedia.org/wiki/Ether,
Ether | (C2H5)2O – PubChem

Huo, Lijun published the artcileSynthesis, characterization and photovoltaic properties of poly{[1′,4′-bis-(thienyl-vinyl)]-2-methoxy-5-(2′-ethylhexyloxy)-1,4-phenylene-vinylene}, Related Products of ethers-buliding-blocks, the publication is Synthetic Metals (2006), 156(2-4), 276-281, database is CAplus.

A new conjugated polymer, poly{[1′,4′-bis-(thienyl-vinyl)]-2-methoxy-5-(2′-ethylhexyloxy)-1,4-phenylene-vinylene} (PTVMEH-PPV) was synthesized via Grignard polymerization The polymer is soluble in common organic solvents such as chloroform and THF, and possesses adequate thermal stability (T_d > 246 °C). The absorption spectrum of PTVMEH-PPV film shows a broader absorption peak covering the wavelength range from 380 nm to 620 nm, which is red-shifted and broadened in comparison with that of MEH-PPV. The onset oxidation potential of the polymer is 0.12 V vs. Ag/Ag⁺, ca. 0.2 V lower than that of MEH-PPV. The band gap of the polymer measured by cyclic voltammetry is 1.82 eV, which basically agrees with that obtained from the onset wavelength of the absorption spectra. Polymer solar cell was fabricated based on the blend of PTVMEH-PPV and PCBM with a weight ratio of 1:1. The device shows the maximum external quantum efficiency of 14% at ca. 520 Nm, an open circuit voltage of 0.67 V and a power conversion efficiency of 0.32% under the illumination of AM1.5, 80 mW/cm².

Synthetic Metals published new progress about 146370-51-6. 146370-51-6 belongs to ethers-buliding-blocks, auxiliary class Benzene,Ether, name is 1-((2-Ethylhexyl)oxy)-4-methoxybenzene, and the molecular formula is C15H24O2, Related Products of ethers-buliding-blocks.

Referemce:
https://en.wikipedia.org/wiki/Ether,
Ether | (C2H5)2O – PubChem

Feng, Xinshu published the artcileEffect of the ancillary ligand in N-heterocyclic carbene iridium(III) catalyzed N-alkylation of amines with alcohols, SDS of cas: 52818-63-0, the publication is Polyhedron (2021), 115289, database is CAplus.

A series of air-stable N-heterocyclic carbene (NHC) Ir(III) complexes (Ir1-Ir6), bearing various combinations of chlorine, pyridine and NHC ligands, were assayed for the N-alkylation of amines with alcs. It was found that Ir3, with two monodentate 1,3-bis-methyl-imidazolylidene (IMe) ligands, emerged as the most active complex. A large variety of amines and primary alcs. were efficiently converted into mono-N-alkylated amines in 53-96% yields. As a special highlight, for the challenging MeOH, selective N-monomethylation could be achieved using KOH as a base under an air atm. Moreover, this catalytic system was successfully applied to the gram-scale synthesis of some valuable compounds

Polyhedron published new progress about 52818-63-0. 52818-63-0 belongs to ethers-buliding-blocks, auxiliary class Pyridine,Amine,Benzene,Ether, name is N-(4-Methoxybenzyl)pyridin-2-amine, and the molecular formula is C13H14N2O, SDS of cas: 52818-63-0.

Referemce:
https://en.wikipedia.org/wiki/Ether,
Ether | (C2H5)2O – PubChem

Liang, Dongdong published the artcileA Metal-Free Tandem Demethylenation/C(sp²)-H Cycloamination Process of N-Benzyl-2-aminopyridines via C-C and C-N Bond Cleavage, Product Details of C13H14N2O, the publication is Organic Letters (2013), 15(13), 3476-3479, database is CAplus and MEDLINE.

A mild, metal-free synthesis of pyrido[1,2-a]benzimidazoles starting with N-benzyl-2-aminopyridines, which employs PhI(OPiv)₂ as a stoichiometric oxidant, has been developed. The process is initiated by an unusual PhI(OPiv)₂-mediated ipso S_EAr reaction, followed by solvent-assisted C-C and C-N bond cleavage.

Organic Letters published new progress about 52818-63-0. 52818-63-0 belongs to ethers-buliding-blocks, auxiliary class Pyridine,Amine,Benzene,Ether, name is N-(4-Methoxybenzyl)pyridin-2-amine, and the molecular formula is C13H14N2O, Product Details of C13H14N2O.

Referemce:
https://en.wikipedia.org/wiki/Ether,
Ether | (C2H5)2O – PubChem

Kim, Jung-Sik published the artcileSynthesis and characterization of organic light-emitting copolymers containing naphthalene, HPLC of Formula: 146370-51-6, the publication is Macromolecular Research (2009), 17(2), 91-98, database is CAplus.

Conjugated PPV-derived block copolymers containing 2-ethylhexyloxynaphthalene unit were synthesized and characterized in this study. The resulting polymers were soluble in common organic solvents and showed good thermal stabilities. The weight-average mol. weights (M_w) of the copolymers ranged from 246,000 to 475,000 with PDIs of 1.3âˆ?.1. The optical properties of these polymers, measured both in a chloroform solution and on a film, showed a maximum absorption at 405âˆ?76 nm for Copolymers I∼VIII. In the PL spectra, Copolymers I∼VIII showed maximum peaks at 510âˆ?66 nm. The HOMOs, LUMOs and band gaps of the PPV derivatives of Copolymers I∼VIII were 5.30âˆ?.77, 3.04âˆ?.24, and 2.5âˆ?.2 eV, resp. The multi-layered, light-emitting diodes of ITO/PEDOT/copolymers/LiF/Al exhibited turn-on voltages of 6âˆ?.5 V. Copolymer VIII exhibited the maximum brightness of 3657 cd/m². Particularly, Copolymer VII, with an identical composition of MEH-PPV and naphthalene-PPV, showed a maximum luminance efficiency and power efficiency of 2.63 cd/A and 1.06 lm/W, resp.

Macromolecular Research published new progress about 146370-51-6. 146370-51-6 belongs to ethers-buliding-blocks, auxiliary class Benzene,Ether, name is 1-((2-Ethylhexyl)oxy)-4-methoxybenzene, and the molecular formula is C15H24O2, HPLC of Formula: 146370-51-6.

Referemce:
https://en.wikipedia.org/wiki/Ether,
Ether | (C2H5)2O – PubChem

Nakayama, Taku published the artcileWater-promoted dehydrative coupling of 2-aminopyridines in heptane via a borrowing hydrogen strategy, COA of Formula: C13H14N2O, the publication is RSC Advances (2021), 11(37), 23144-23150, database is CAplus and MEDLINE.

A synthetic method for dehydrative N-benzylation promoted by water mols. in heptane using a π-benzylpalladium system has been developed. The presence of water significantly accelerates carbon-nitrogen bond formation, which is accomplished in an atom-economical process to afford the corresponding N-monobenzylated products. A crossover experiment afforded H/D scrambled products, which is consistent with a borrowing hydrogen mechanism. Kinetic isotope effect measurements revealed that benzylic carbon-hydrogen bond cleavage was the rate-determining step.

RSC Advances published new progress about 52818-63-0. 52818-63-0 belongs to ethers-buliding-blocks, auxiliary class Pyridine,Amine,Benzene,Ether, name is N-(4-Methoxybenzyl)pyridin-2-amine, and the molecular formula is C13H14N2O, COA of Formula: C13H14N2O.

Referemce:
https://en.wikipedia.org/wiki/Ether,
Ether | (C2H5)2O – PubChem

Jensen, K. A. published the artcileReaction between 5-amino-1,2,3,4-thiatriazole and hydrochloric acid, Name: Formamidine disulfide dihydrochloride, the publication is Acta Chemica Scandinavica (1964), 18(2), 570-2, database is CAplus.

The treatment of monoalkylthioureas with Cl or heating 5-alkylamino-1,2,3,4-thiatriazoles with concentrated HCl 1 hr. at 100° produced derivatives of [RNHC(:NH)S]₂ (I). For example, a cooled saturated solution of NH₂CSNH₂(II) in absolute EtOH treated with Cl gas until the solution yellowed, the mixture filtered, the precipitate dissolved in H₂O, and the solution poured into concentrated HCl gave I.2HCl (R = H) (III), m. 172-4° (the substance was diamagnetic). III obtained from II and from 5-amino-1,2,3,4-thiatriazole (IV) were identical, and this result confirmed earlier conclusions (Sahasrabudhey, CA 45, 8006f). III could be produced from IV via reduction of H₂NC(:NH)S⁺ with HN₃, both pos. ion and acid being formed by hydrolysis of the thiatriazole ring. I (R = Me).2HCl, m. 163-5°, and I (R = Pr).2HCl, m. 155-6°, were also prepared by both methods. l oxidation of tert-BuNHCSNH₂ (V), m. 181°, and the HCl hydrolysis of 5-tert-butylamino-1,2,3,4-thiatriazole produced III. I (R = tert-Bu).2HBr, m. 141-2°, was prepared by the oxidation of V in AcOH with Br in CCl₄.

Acta Chemica Scandinavica published new progress about 14807-75-1. 14807-75-1 belongs to ethers-buliding-blocks, auxiliary class Salt,Thiourea,Amine,Aliphatic hydrocarbon chain, name is Formamidine disulfide dihydrochloride, and the molecular formula is C2H8Cl2N4S2, Name: Formamidine disulfide dihydrochloride.

Referemce:
https://en.wikipedia.org/wiki/Ether,
Ether | (C2H5)2O – PubChem