Tag: M.W=200-250

Chichibabin, A. E. published the artcileAction of aldehydes on α-aminopyridine and on α-dimethylaminopyridine, Related Products of ethers-buliding-blocks, the publication is Berichte der Deutschen Chemischen Gesellschaft [Abteilung] B: Abhandlungen (1931), 2839-42, database is CAplus.

In the action of HCHO on α-aminopyridine (1), 2 reactions take place simultaneously, condensation to a dipyridyl derivative and methylation of the amino group, the end product being p,p’-tetra methyldiaminodipyridylmethane (C. A. 24, 1642). It seemed of interest to study the behavior of other aldehydes toward I under these conditions. With aromatic aldehydes in HCO₂H there is no condensation, only a reaction analogous to the above methylation but differing from it in that only 1 H atom of the amino group seems to be replaced by the aromatic residue because the primarily formed Schiff base is at once reduced; secondary amines can be obtained in excellent yield by this method. The o-substituted derivatives of BzH studied (o-NO₂, o-HO) do not react with I under these conditions. BzH, heated with α-C₅H₄NNMe₂ (II) and ZnCL₂, reacts like BzH with PhNMe₂, giving phenylbis(α-dimethylaminopyridyl)methane (III), which is oxidized by PbO₂ in acid solution to the carbinol (IV). α-Benzylaminopyridine, m. 94°, is obtained in 90% yield from I in anhydrous HCO₂H refluxed with BzH. α-(p-Methoxybenzylamino)pyridine, from I and anisaldehyde (80-5% yield), m. 128°. α-(3,4-Methylenedioxybenzylamino)-pyridine (70%), m. 99-100°. α-Formylaminopyridine, from equimol. amounts of I and anhydrous HCO₂H carefully heated in a Claisen flask until the formation of water ceased, b₁₅161-2°, m. 71°. III (6 g. from 10 g. II), m. 130-1°, soluble in H₂SO₄ without color. IV, yellowish, m. 123-4°, soluble in concentrated H₂SO₄ with blood-red and in HCl with deep red color, water destroying the color, which, however, is restored by concentrated acids, although the simple salts cannot be obtained in colored form.

Berichte der Deutschen Chemischen Gesellschaft [Abteilung] B: Abhandlungen 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, Related Products of ethers-buliding-blocks.

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

Reddy, P. Srinivasa published the artcileReductive amination of carbonyl compounds using NaBH₄ in a Bronsted acidic ionic liquid, COA of Formula: C13H14N2O, the publication is Tetrahedron Letters (2007), 48(50), 8807-8810, database is CAplus.

Reductive amination of carbonyl compounds using sodium borohydride is conducted in the Bronsted acidic ionic liquid, 1-methylimidazolium tetrafluoroborate ([HMIm][BF₄]). The ionic liquid plays the dual role of solvent as well as catalyst for efficient conversion of aldehydes and ketones to amines in excellent yields without the formation of side products.

Tetrahedron 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, COA of Formula: C13H14N2O.

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

Yigit, Murat published the artcileRuthenium(II)-NHC-catalyzed (NHC = perhydrobenzimidazol-2-ylidene) alkylation of amines using the hydrogen borrowing methodology under solvent-free conditions, Formula: C13H14N2O, the publication is Transition Metal Chemistry (Dordrecht, Netherlands) (2019), 44(6), 565-573, database is CAplus.

New ruthenium(II) complexes with N-heterocyclic carbene ligand were synthesized by transmetalation reactions between silver(I) N-heterocyclic carbene complexes and [RuCl₂(p-cymene)]₂. The complexes were characterized by physicochem. and spectroscopic methods. These ruthenium complexes were applied to the N-monoalkylation of aromatic amines with a wide range of primary alcs. under solvent-free conditions using the hydrogen borrowing strategy. The catalytic reactions using all ruthenium complexes resulted in N-monoalkylated products with high selectivities using furfuryl alc. as the alkylating agent.

Transition Metal Chemistry (Dordrecht, Netherlands) 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 C40H35N7O8, Formula: C13H14N2O.

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

Yu, Xiaochun published the artcilePalladium-Catalyzed N-Alkylation of Amides and Amines with Alcohols Employing the Aerobic Relay Race Methodology, Recommanded Product: N-(4-Methoxybenzyl)pyridin-2-amine, the publication is Chinese Journal of Chemistry (2012), 30(10), 2322-2332, database is CAplus.

Possibly because homogeneous palladium catalysts are not typically borrowing hydrogen catalysts and ligands are thus ineffective in catalyst activation under conventional anaerobic conditions, they had not been used in the N-alkylation reactions of amines/amides with alcs. in the past. By employing the aerobic relay race method with Pd-catalyzed aerobic alc. oxidation being a more effective protocol for alc. activation, ligand-free homogeneous palladium are successfully used as active catalysts in the dehydration N-alkylation reactions, giving high yields and selectivities of the alkylated amides and amines. Mechanistic studies implied that the reaction most probably proceeds by a novel relay race mechanism that was recently discovered and proposed.

Chinese Journal of 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 C9H6BrNO, Recommanded Product: N-(4-Methoxybenzyl)pyridin-2-amine.

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

Sun, Jian published the artcileNi-Cu/γ-Al₂O₃ catalyzed N-alkylation of amines with alcohols, Safety of N-(4-Methoxybenzyl)pyridin-2-amine, the publication is Catalysis Communications (2012), 30-33, database is CAplus.

A γ-Al₂O₃-supported Ni and Cu bimetallic nanoparticles catalyst (45 weight % Ni, Ni/Cu mass ratio = 4.5/1.0) is prepared by electroless plating method for the N-alkylation of amines with alcs. under base and Lewis acidic cocatalyst conditions. The catalyst afforded fast conversions, high selectivity for amines and alcs. with various structures under an argon atm. in o-xylene. Furthermore, the catalyst still has a stable catalytic activity after being regenerated for two consecutive cycles.

Catalysis Communications 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 C6H3F2NO3, Safety of N-(4-Methoxybenzyl)pyridin-2-amine.

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

Foss, Olav published the artcileConstitution of the formamidinium disulfide ion, from the crystal structures of the diiodide and dibromide, Name: Formamidine disulfide dihydrochloride, the publication is Acta Chemica Scandinavica (1958), 1782-98, database is CAplus.

cf. C.A. 52, 8673c. Two-dimensional x-ray analysis shows that the unit cells of [(H₂N)₂CS]₂I₂.H₂O (I), [(H₂N)₂CS]₂Br₂.H₂O (II), and [(H₂N)₂CS]₂Cl₂.H₂O have the dimensions a 5.15 A., b 16.52, c 13.39, d. 2.04 g./cc., and space group D¹⁰_2h-Pccn with Z = 4; a 8.61 A., b 5.12, c 12.40, β 99.5°, d. 2.47 g./cc., and space group C⁴_2h-P2/c with Z = 2; and a 10.54 A., b 19.75, c 8.85, d. 1.57 g./cc., space group D¹⁵_2h-Pbca with Z = 8, resp. The disulfide group has a normal configuration and dimensions, with SS 2.04 A. and the SSC angles 99° and 104°, and the CSS/SSC dihedral angles 105° and 89°, resp., for I and II. Except for a slight lengthening of the CS bond, the dimensions of the thiourea (III) group are as in the III mol. before oxidation; there is an insignificant deviation from planarity of the III group and no significant difference between the lengths of the 2 CN bonds of a group. In both salts the H₂O mols. lie on 2-fold axes, and each participates in H bonds with 2 halide ions and 2 N atoms. The x-ray crystallographic work establishes the disulfide nature of the salts in the crystalline state. The structures were solved by use of the heavy-atom method; the positions of the I^– and Br^– ions were determined from Patterson projections.

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

Amrutha, S. R. published the artcileControl of π-Stacking for Highly Emissive Poly(p-phenylenevinylene)s: Synthesis and Photoluminescence of New Tricyclodecane Substituted Bulky Poly(p-phenylenevinylene)s and Its Copolymers, Application In Synthesis of 146370-51-6, the publication is Journal of Physical Chemistry B (2006), 110(9), 4083-4091, database is CAplus and MEDLINE.

In the present work, we have demonstrated a facile approach to increase the luminescence of the poly (p-phenylenevinylene)s via controlling the mol. aggregates induced by π-stacking. We have synthesized new bulky tricyclodecane (TCD) substituted PPVs: poly(2-methoxy-5-tricyclodecanemethyleneoxy-1,4-phenylenevinylene) (MTCD-PPV), poly(bis-2,5-tricyclodecanemethyleneoxy-1,4-phenylenevinylene) (BTCD-PPV), and a series of sym. substituted bulky PPV copolymers (P-1-P-7) covering the entire composition range from 0 to 100 mol %. The structures of the monomers and polymers were confirmed by ¹H NMR and FTIR, and the mol. weights were determined by gel permeation chromatog. The composition anal. by NMR revealed that the bulky monomer was highly reactive and the incorporation of bulky units in MEH-PPV increased irresp. of the feed ratio. The polymers possess good solubility, high mol. weights, good thermal stability, and so forth. The mol. weights of the PPV copolymers were also significantly affected by the bulky substitution: the higher the incorporation of bulky units, the lower the mol. weight The absorption and emission studies revealed that there was no influence on the MEH-PPV by TCD substitution in solution whereas in the solid state the photoluminescence intensity of PPV increased more than 10 times. The luminescence increase in PPV was observed throughout the entire bulk and was not confined to any particular domain in the polymer. The bulky PPV copolymers showed that both the luminescence intensity (in film) and quantum yields (in solution) increased with an increase in the extent of BTCD incorporation in the MEH-PPV and attained a maximum for 50% BTCD. The TCD unit has thus proved to be an efficient bulky susbstituent for PPV as it controls the π-stack-induced mol. aggregates in the polymer chains by increasing the interchain distances. The new bulky PPV copolymers are highly soluble, thermally stable, and highly luminescent besides being economically cheap compared to the other materials reported so far for the bulkier approach in π-conjugated materials.

Journal of Physical Chemistry B 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, Application In Synthesis of 146370-51-6.

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

Deepa, P. published the artcilePolyurethane-oligo(phenylenevinylene) random copolymers: π-conjugated pores, vesicles, and nanospheres via solvent-induced self-organization, Name: 1-((2-Ethylhexyl)oxy)-4-methoxybenzene, the publication is Journal of Polymer Science, Part A: Polymer Chemistry (2008), 46(17), 5897-5915, database is CAplus.

We report a new series of polyurethane-oligo(phenylenevinylene) (OPV) random copolymers and their self-assembled nanomaterials such as pores, vesicles, and luminescent spheres. The polymers were synthesized through melt transurethane process by reacting a hydroxyl-functionalized OPV with diurethane monomer and diol under solvent-free and nonisocyanate conditions. The amount of OPV was varied up to 50 mol % in the feed to incorporate various amounts of π-conjugated segments in the polyurethane backbone. The π-conjugated segmented polymers were subjected to solvent induced self-organization in THF or THF+water to produce variety of morphologies ranging from pores (500 nm to 1 μm) to spheres (100 nm to 2 μm). Upon shining 370-nm light, the dark solid nanospheres of the copolymers transformed into blue luminescent nanoballs under fluorescence microscope. The mechanistic aspects of the self-organization process were studied using solution FTIR and photophys. techniques such as absorption and emission to trace the factors which control the morphol. FTIR studies revealed that the hydrogen bonding plays a significant role in the copolymers with lower amount of OPV units. Time resolved fluorescent decay measurements of copolymers revealed that mol. aggregation via π-conjugated segments play a major role in the samples with higher OPV content in the random block polymers.

Journal of Polymer Science, Part A: Polymer Chemistry 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

Jin, Youngeup published the artcileSynthesis and electroluminescent properties of copolymers based on PPV with fluoro groups in vinylene units, Application In Synthesis of 146370-51-6, the publication is Polymer (2007), 48(6), 1541-1549, database is CAplus.

Electroluminescent copolymers with fluoro groups on vinylene units, poly(2-ethylhexyloxy-5-methoxy-p-phenylenevinylene-co-2-dimethyloctylsilyl-p-phenylenedifluorovinylene) (MEH-PPV-co-DMOS-PPDFV) and poly(2-dimethyloctylsilyl-p-phenylenevinylene-co-2-dimethyloctylsilyl-p-phenylenedifluorovinylene) (DMOS-PPV-co-DMOS-PPDFV), were synthesized by the Gilch polymerization route. The fluoro groups were introduced on vinylene units to increase the electron affinity of the copolymers. In both copolymers, the band gap increased with higher ratio of DMOS-PPDFV. As compared to the photoluminescence (PL) spectra in solution, the PL spectra in solid state and EL spectra of both copolymers showed red shift and broad peaks caused by aggregation. The LEDs fabricated using MEH-PPV-co-DMOS-PPDFVs emit light with maximum at around 538-577 nm. By adjusting the feed ratio of DMOS-PPDFV in the copolymer, the emission colors were tuned from orange yellow to green. The DMOS-PPV-co-DMOS-PPDFV showed maximum electroluminescence (EL) peaks at about 514-543 nm. The DMOS-PPV-co-DMOS-PPDFV with 1:9 feed ratio showed the highest luminescence efficiency of 1.31 lm/W.

Polymer 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, Application In Synthesis of 146370-51-6.

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

Ahn, Taek published the artcileBlue Electroluminescent Polymers: Control of Conjugation Length by Kink Linkages and Substituents in the Poly(p-phenylenevinylene)-Related Copolymers, Synthetic Route of 146370-51-6, the publication is Macromolecules (1999), 32(10), 3279-3285, database is CAplus.

Poly[o(m,p)-phenylenevinylene-alt-2-methoxy-5-(2-ethylhexyloxy)-p-phenylenevinylene], o(m,p)-PMEH-PPV, and poly[o(m,p)-phenylenevinylene-alt-2,5-bis(trimethylsilyl)-p-phenylenevinylene], o(m,p)-PBTMS-PPV, of varying effective conjugation lengths were synthesized by the well-known Wittig condensation polymerization between the appropriate diphosphonium salts and the dialdehyde monomers such as terephthaldicarboxaldehyde, isophthalaldehyde, and phthalic dicarboxaldehyde. The conjugation lengths of the polymers were controlled by substituents and kink (ortho and meta) linkages. The resulting polymers were highly soluble in common organic solvents. The synthesized polymers showed UV-visible absorbance and photoluminescence (PL) in the ranges of 330-430 nm and 440-550 nm, resp. The maximum emission peak of p-PMEH-PPV was blue shifted about 30 nm compared to that of MEH-PPV, which is due to an unsubstituted phenylene unit. In addition, o-PMEH-PPV and m-PMEH-PPV showed PL emission maximum peaks at 500 and 490 nm, resp., because ortho and meta linkage of the o(m)-PMEH-PPV reduced π-conjugation lengths. The trimethylsilyl substituent has no electron donating effect; therefore, the PL maximum of p-PBTMS-PPV was far more blue shifted (to 485 nm). Consequently, maximum PL wavelengths for o-PBTMS-PPV and m-PBTMS-PPV appeared around 470 and 440 nm, resp. A single-layer light-emitting diode device was fabricated which has a simple ITO (indium-tin oxide)/polymer/Al configuration. The threshold bias of trimethylsilyl-substituted o(m,p)-PBTMS-PPV was in the range of 8-9 V. As in the photoluminescence spectra, the dramatic change of emission color was also shown in electroluminescence spectra of p-PMEH-PPV, p-PBTMS-PPV, and o-PBTMS-PPV when the operating voltage was about 8-9 V.

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, Synthetic Route of 146370-51-6.

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