Month: December 2022

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

Wilson, Loren C. published the artcileDIPPR Project 851 – Thirty Years of Vapor-Liquid Critical Point Measurements and Experimental Technique Development, Recommanded Product: 2-Methoxypropan-1-ol, the publication is Journal of Chemical & Engineering Data (2018), 63(9), 3408-3417, database is CAplus.

Exptl. determined critical temperatures (T_c) and critical pressures (P_c) are reported for 64 compounds In addition, the critical volume (V_c) has been exptl. determined for 14 of these compounds The compounds in this study are of industrial interest in process design, simulation, and safety. These data also extend our understanding of and ability to predict these properties from group contribution methods.

Journal of Chemical & Engineering Data published new progress about 1589-47-5. 1589-47-5 belongs to ethers-buliding-blocks, auxiliary class Aliphatic hydrocarbon chain,Alcohol,Ether, name is 2-Methoxypropan-1-ol, and the molecular formula is C16H18O4, Recommanded Product: 2-Methoxypropan-1-ol.

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

Keim, Michael published the artcile1,3-Bis(trifluoromethyl)prop-2-ene 1-Iminium Salts: Reactions with Alkoxybenzenes and Anilines, Formula: C8H10O2, the publication is Synthesis (2022), 54(6), 1587-1600, database is CAplus.

1,3-Bis(trifluoromethyl)prop-2-ene 1-iminium triflate salts were prepared for the first time and some synthetic applications as 1,3-biselectrophilic building blocks were established. They were found to react with dimethoxybenzenes or methylene-1,2-dioxybenzenes to furnish vinylogous trifluoroacetylation products (4-aryl-1,1,1,5,5,5-hexafluoropent-3-en-2-ones) and 1-dialkylamino-1,3-bis(trifluoromethyl)-1 H-indenes. With aniline and ring-substituted anilines, 2,4-bis(trifluoromethyl)quinolines were formed. An unusual 4 H-pyran, formally a condensation product of the N, N-dimethyl-1,3-bis(trifluoromethyl)prop-2-en-1-iminium ion and its enaminone precursor, is also reported.

Synthesis published new progress about 91-16-7. 91-16-7 belongs to ethers-buliding-blocks, auxiliary class Benzene,Ether,Inhibitor,Inhibitor,Inhibitor, name is 1,2-Dimethoxybenzene, and the molecular formula is C8H10O2, Formula: C8H10O2.

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

Wojcik-Pszczola, Katarzyna published the artcileSynthesis and in vitro evaluation of anti-inflammatory, antioxidant, and anti-fibrotic effects of new 8-aminopurine-2,6-dione-based phosphodiesterase inhibitors as promising anti-asthmatic agents, Safety of (2-Methoxyphenyl)methanamine, the publication is Bioorganic Chemistry (2021), 105409, database is CAplus and MEDLINE.

Phosphodiesterase inhibitors are currently an extensively studied group of compounds that can bring many benefits in the treatment of various inflammatory and fibrotic diseases, including asthma. Herein, we describe a series of novel N�phenyl- or N�benzylbutanamide and N�arylidenebutanehydrazide derivatives of 8-aminopurine-2,6-dione (27-43) and characterized them as prominent pan-PDE inhibitors. Most of the compounds exhibited antioxidant and anti-inflammatory activity in LPS-induced murine macrophages RAW264.7. The most active compounds (32-35 and 38) were evaluated in human bronchial epithelial cells derived from asthmatics. To better map the bronchial microenvironment in asthma, HBECs after exposure to selected 8-aminopurine-2,6-dione derivatives were incubated in the presence of two proinflammatory and/or profibrotic factors: TGF-beta and IL-13. Detailed anal. of their inhibition preferences for selected PDEs showed high affinity for isoenzymes important in the pathogenesis of asthma, including PDE1, PDE3, PDE4, PDE7, and PDE8. The presented data confirm that structural modifications within the 7 and 8 positions of the purine-2,6-dione core result in obtaining preferable pan-PDE inhibitors which in turn exert an excellent anti-inflammatory and anti-fibrotic effect in the bronchial epithelial cells derived from asthmatic patients. This dual-acting pan-PDE inhibitors constitute interesting and promising lead structures for further anti-asthmatic agent discovery.

Bioorganic Chemistry published new progress about 6850-57-3. 6850-57-3 belongs to ethers-buliding-blocks, auxiliary class Amine,Benzene,Ether, name is (2-Methoxyphenyl)methanamine, and the molecular formula is C4H10O2, Safety of (2-Methoxyphenyl)methanamine.

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

Choi, Won-Sik published the artcileSynthesis and antifungal activities of isopropylphenyl derivatives, Quality Control of 2944-47-0, the publication is Han’guk Eungyong Sangmyong Hwahakhoeji (2007), 50(3), 178-186, database is CAplus.

42 Compounds such as ester, sulfonyl ester, phosphoryl ester and ether derivatives of 4-isopropylphenol and 2-isopropylphenol were synthesized. These derivatives were identified by IR, GC/MS and ¹H-NMR spectra. Their in vitro antifungal activities were tested against 10 plant pathogenic fungi. Among them, several compounds showed potent in vitro antifungal activity. The selected compounds showing potent in vitro antifungal activity were tested for their in vivo antifungal activities against 5 plant diseases such as rice blast, rice sheath blast, cucumber anthracnose, cucumber gray mold and tomato late blight. As a result, 2-isopropylphenyl piperonylate (I) showed a potent in vivo antifungal activity against cucumber anthracnose and tomato late blight, 4-isopropylphenyl 4-methoxybenzenesulfonate (II) effectively inhibited the development of rice blast.

Han’guk Eungyong Sangmyong Hwahakhoeji published new progress about 2944-47-0. 2944-47-0 belongs to ethers-buliding-blocks, auxiliary class Benzene,Ether, name is 2-Isopropylanisole, and the molecular formula is C10H14O, Quality Control of 2944-47-0.

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

Adamska-Bartlomiejczyk, Anna published the artcileCyclic mu-opioid receptor ligands containing multiple N-methylated amino acid residues, Safety of (S)-2-((((9H-Fluoren-9-yl)methoxy)carbonyl)(methyl)amino)-3-phenylpropanoic acid, the publication is Bioorganic & Medicinal Chemistry Letters (2017), 27(8), 1644-1648, database is CAplus and MEDLINE.

In this study we report the in vitro activities of four cyclic opioid peptides with various sequence length/macrocycle size and N-methylamino acid residue content. N-Methylated amino acids were incorporated and cyclization was employed to enhance conformational rigidity to various extent. The effect of such modifications on ligand structure and binding properties were studied. The pentapeptide containing one endocyclic and one exocyclic N-methylated amino acid displayed the highest affinity to the μ-opioid receptor. This peptide was also shown to be a full agonist, while the other analogs failed to activate the μ-opioid receptor. Results of mol. docking studies provided rationale for the explanation of binding properties on a structural basis.

Bioorganic & Medicinal Chemistry Letters published new progress about 77128-73-5. 77128-73-5 belongs to ethers-buliding-blocks, auxiliary class Inhibitor, name is (S)-2-((((9H-Fluoren-9-yl)methoxy)carbonyl)(methyl)amino)-3-phenylpropanoic acid, and the molecular formula is C25H23NO4, Safety of (S)-2-((((9H-Fluoren-9-yl)methoxy)carbonyl)(methyl)amino)-3-phenylpropanoic acid.

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

Zawadiak, Jan published the artcileThe liquid-phase oxidation of isomeric methoxy-(1-methylethyl)benzenes with oxygen to the hydroperoxides, Computed Properties of 2944-47-0, the publication is International Journal of Chemical Kinetics (2004), 37(1), 10-16, database is CAplus.

The kinetics of liquid-phase oxidation of 1-methoxy-2-(1-methylethyl)benzene (1a), 1-methoxy-3-(1-methylethyl)benzene (1b), and 1-methoxy-4-(1-methylethyl)benzene (1c) with oxygen as oxidant to yield the corresponding 1-methyl-1-(2-methoxyphenyl)ethyl (2a), 1-methyl-1-(3-methoxyphenyl)ethyl (2b), and 1-methyl-1-(4-methoxyphenyl)ethyl (2c) hydroperoxides was studied. The oxidizabilities of 1a, 1b, and 1c were established over the temperature range 50-120°C. The overall activation energies of oxidation were determined for 1b and 1c over the temperature range 50-120°C. Thermal stability of 2a and 2b and the initiating properties of hydroperoxides 2a, 2b, and 2c were studied. Long-term noncatalytic oxidations of 1b and 1c to resp. hydroperoxides were carried out.

International Journal of Chemical Kinetics published new progress about 2944-47-0. 2944-47-0 belongs to ethers-buliding-blocks, auxiliary class Benzene,Ether, name is 2-Isopropylanisole, and the molecular formula is C6H8O6, Computed Properties of 2944-47-0.

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

Kushawaha, Ajay Kishor published the artcileA simple and efficient oxidation of primary and secondary benzylamines to acids using table salt in aqueous medium, Related Products of ethers-buliding-blocks, the publication is Tetrahedron (2021), 132502, database is CAplus.

A novel, simple, efficient method for the oxidation of aromatic benzylamines RCH₂NH₂ (R = C₆H₅, 4-FC₆H₄, 2-thienyl, etc.), R¹CH₂NHCH₂R¹ (R¹ = C₆H₅, 4-ClC₆H₄, 2-thienyl, etc.) and 4-OCH₃C₆H₄CH₂NHR₂ (R₂ = Me, Et, Pr, n-octyl, t-butyl) to corresponding acids RC(O)OH, R¹C(O)OH and 4-methoxybenzoic acid using common table salt in aqueous medium has been described. Oxidation of benzylamine was achieved by using NaCl (20 mol%) as a catalyst, NaOH (4 equiv) and TBHP (5 equiv) as oxidant, in moderate to good yields (34-84%). Control experiments revealed that in situ generated ClO₂^– ion is the active form of the catalyst. This methodol. can also be scaled up for easy accessibility to the industrially important terephthalic acid as well. This investigation provided a facile entry of various primary as well as secondary benzylamines with wide range of functional group tolerance.

Tetrahedron published new progress about 6850-57-3. 6850-57-3 belongs to ethers-buliding-blocks, auxiliary class Amine,Benzene,Ether, name is (2-Methoxyphenyl)methanamine, and the molecular formula is C8H11NO, Related Products of ethers-buliding-blocks.

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

Brown, Herbert C. published the artcileChiral synthesis via organoboranes. 13. A highly diastereoselective and enantioselective addition of [(Z)-γ-alkoxyallyl]diisopinocampheylboranes to aldehydes, COA of Formula: C21H37BO, the publication is Journal of the American Chemical Society (1988), 110(5), 1535-8, database is CAplus.

Isomerically pure [(Z)-γ-methoxyallyl]diisopinocampheylboranes, I, prepared from (+)-α-pinene and II, have been prepared from B-methoxydiisopinocampheylborane and lithiated allyl Me ether. These enantiomeric [(Z)-γ-methoxyallyl]diisopinocampheylboranes retain their stereochem. identity under the reaction conditions. They have been successfully condensed with various aldehydes, such as acetaldehyde, propionaldehyde, 2-methylpropionaldehyde, and benzaldehyde in a regioselective and stereoselective manner to yield the corresponding threo-β-methoxyhomoallyl alcs. in â‰?9% diastereoselectivities and â‰?5% enantioselectivities. Similarly, [(Z)-γ-[(methoxymethyl)oxy]allyl]diisopinocampheylborane was prepared and was utilized for the preparation of threo-1,2-diol.

Journal of the American Chemical Society published new progress about 99438-28-5. 99438-28-5 belongs to ethers-buliding-blocks, auxiliary class Chiral,Aliphatic cyclic hydrocarbon, name is (+)-B-Methoxydiisopinocampheylborane, and the molecular formula is C21H37BO, COA of Formula: C21H37BO.

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