Tag: M.W=50-100

Yella Reddy, P. published the artcileAcoustic, volumetric and FTIR study of binary liquid mixtures of 2-methyl cyclohexanone with amides, Synthetic Route of 123-39-7, the main research area is methyl cyclohexanone amide acoustic volumetric FTIR binary liquid mixture.

Densities, speeds of sound, and viscosities at various temperatures were determined for the systems: 2-methylcyclohexanone (2-MCYH) + formamide (F), N-methylformamide (NMF) and N, N-dimethylformamide (DMF). From the exptl. results, Excess molar volume VEm, Excess isentropic compressibility κEs, deviation in viscosity Δη and excess Gibbs energy of activation of viscous flow G*E, Excess partial molar properties at infinite dilution V°Em,1, V°Em,2, K°Es,m,1 and K°Es,m,2 were calculated There is evidence of complex formation between unlike mols. FT-IR properties have been carried out to study the specific interaction, such as the formation of the hydrogen bond between unlike mols. in the binary liquid mixtures, a good agreement is observed among the excess parameters and FT-IR spectroscopic properties.

Journal of Chemical Thermodynamics published new progress about Activation energy. 123-39-7 belongs to class amides-buliding-blocks, name is N-Methylformamide, and the molecular formula is C2H5NO, Synthetic Route of 123-39-7.

Referemce:
Amide – Wikipedia,
Amide – an overview | ScienceDirect Topics

Li, Hu published the artcileA Facile Direct Route to N-(Un)substituted Lactams by Cycloamination of Oxocarboxylic Acids without External Hydrogen, Recommanded Product: N-Methylformamide, the main research area is lactam preparation oxocarboxylic acid formamide water cycloamination green chem; amination; cyclization; density functional calculations; lactams; reduction.

Lactams are privileged in bioactive natural products and pharmaceutical agents and widely featured in functional materials. This study presents a novel versatile approach to the direct synthesis of lactams from oxocarboxylic acids without catalyst or external hydrogen. The method involves the in situ release of formic acid from formamides induced by water to facilitate efficient cycloamination. Water also suppresses the formation of byproducts. This unconventional pathway is elucidated by a combination of model experiments and d. functional theory calculations, whereby cyclic imines (5-methyl-3,4-dihydro-2-pyrrolone and its tautomeric structures) are found to be favorable intermediates toward lactam formation, in contrast to the conventional approach encompassing cascade reductive amination and cyclization. This sustainable and simple protocol is broadly applicable for the efficient production of various N-unsubstituted and N-substituted lactams.

ChemSusChem published new progress about Activation energy. 123-39-7 belongs to class amides-buliding-blocks, name is N-Methylformamide, and the molecular formula is C2H5NO, Recommanded Product: N-Methylformamide.

Referemce:
Amide – Wikipedia,
Amide – an overview | ScienceDirect Topics

Yuan, Jin-Wei published the artcileTransition-metal free C3-amidation of quinoxalin-2(1H)-ones using Selectfluor as a mild oxidant, Computed Properties of 123-39-7, the main research area is quinoxalinone amide Selectfluor promoter oxidative amidation; oxoquinoxalinyl amide preparation.

A practical and efficient synthetic route to construct a variety of 3-amidated quinoxalin-2(1H)-ones was developed via transition-metal free direct oxidative amidation of quinoxalin-2(1H)-ones with amidates using Selectfluor reagent as a mild oxidant. This protocol features mild reaction conditions, operational simplicity, broad substrate scope, and good to excellent yields.

Organic & Biomolecular Chemistry published new progress about Amidation (oxidative). 123-39-7 belongs to class amides-buliding-blocks, name is N-Methylformamide, and the molecular formula is C2H5NO, Computed Properties of 123-39-7.

Referemce:
Amide – Wikipedia,
Amide – an overview | ScienceDirect Topics

Gascooke, Jason R. published the artcileThe Case for Methyl Group Precession Accompanying Torsional Motion, COA of Formula: C2H5NO, the main research area is toluene torsional motion mol vibration.

For mols. containing a Me group, high precision fits of rotational line data (microwave spectra) that encompass several torsional states require considerably more constants than are required in comparable rigid mols. Many of these addnl. terms are ‘torsion-rotation interaction’ terms, but their precise phys. meaning is unclear. In this paper, we explore the phys. origins of many of these addnl. terms in the case where the Me group is attached to a planar frame. We show that torsion-vibration coupling, which has been observed in toluene and several substituted toluenes, provides the dominant contribution to a number of the torsion-rotation constants in toluene. It is further demonstrated that this coupling is intimately related to precession of the Me group. A number of the constants required in the high resolution fits of rotational line data are shown to arise as a natural consequence of Me precession. By considering several mols. whose rotational line spectra have been fit to high precision, we demonstrate that the exptl. evidence is consistent with the occurrence of Me group precession. Quantum chem. calculations of the optimized mol. structures at key torsional angles provide further evidence that Me precession occurs. There is both a torsional angle dependent tilt of the Cmethyl-frame bond and of the Me group principal rotation axis relative to the Cmethyl-frame bond.

Australian Journal of Chemistry published new progress about Bond angle, torsional. 123-39-7 belongs to class amides-buliding-blocks, name is N-Methylformamide, and the molecular formula is C2H5NO, COA of Formula: C2H5NO.

Referemce:
Amide – Wikipedia,
Amide – an overview | ScienceDirect Topics

Smirnov, Valeriy I. published the artcileThe effect of the side chain structures on the energy of intermolecular interactions of α-amino acids with some formamides in aqueous solutions at T = 298.15 K, Application In Synthesis of 123-39-7, the main research area is amino acid formamide water intermol interaction dissolution enthalpy temperature.

To evaluate the effect of amino acid side chains on the thermodn. of their interaction with the formamides mols. in aqueous solutions, we expanded the range of amino acids by studying in the present investigation the thermodn. of the dissolution of glutamine in mixed solvents {water + (formamide, N-methylformamide and N,N-dimethylformamide)} at T = 298.15 K and organic solvent mole fractions up to x2 ∼ 0.3. The standard enthalpies of solution (ΔsolH°) and transfer (ΔtrH°) of L-glutamine from water to a mixed solvent as well as the enthalpy coefficients of pairwise interactions (hxy) were calculated The interrelation between enthalpic characteristics of L-glutamine dissolution (transfer) and the composition of water-organic mixtures was determined Using the enthalpic coefficients of pairwise interactions of L-glutamine and five more amino acids (glycine, DL-α-alanine, L-valine, L-methionine, and L-threonine), the enthalpic contributions of the side chains of these amino acids to their interparticle interactions with the mols. of formamides were calculated

Journal of Molecular Liquids published new progress about Electric conductivity. 123-39-7 belongs to class amides-buliding-blocks, name is N-Methylformamide, and the molecular formula is C2H5NO, Application In Synthesis of 123-39-7.

Referemce:
Amide – Wikipedia,
Amide – an overview | ScienceDirect Topics

Venkatramaiah, T. published the artcileDesign, synthesis and evaluation of chlorothiazide derivatives, Recommanded Product: N-Methylformamide, the main research area is chlorothiazide preparation antibacterial antifungal.

Hydrochlorothiazide and chlorthiazide are high potent diuretics used in treatment of hypertension. In recent research trends shows that chlorthiazide derivatives are used in osteoporosis and also has antimicrobial activity against various bacterial species. In this view a series of chlorthiazide derivatives were designed, synthesized six compounds by condensing chloroacetyl chloride with chlorthiazide by using ethanol as a solvent refluxed at 60° temperature Formed compound is taken as intermediate and further refluxed and condensed with aromatic amines to give substituted chlorthiazide derivatives The substituted chlorthiazide derivatives were screened for antibacterial activity.

Asian Journal of Pharmaceutical Analysis and Medicinal Chemistry published new progress about Antibacterial agents. 123-39-7 belongs to class amides-buliding-blocks, name is N-Methylformamide, and the molecular formula is C2H5NO, Recommanded Product: N-Methylformamide.

Referemce:
Amide – Wikipedia,
Amide – an overview | ScienceDirect Topics

Wang, Meng published the artcileChemical characteristics and sources of nitrogen-containing organic compounds at a regional site in the North China Plain during the transition period of autumn and winter, Related Products of amides-buliding-blocks, the main research area is chem source nitrogen containing organic compound regional; transition period autumn winter; Nitrogen-containing organic compounds; North China Plain; Receptor model; Source apportionment.

Organic nitrogen constitutes a significant fraction of the nitrogen budget in particulate matter (PM). However, the composition and sources of nitrogen-containing organic compounds (NOCs) in PM remain unclear currently in North China Plain (NCP), China. Rare local or regional studies on NOCs were conducted. In this study, ambient fine particles (PM2.5) were collected in Xianghe, a regional background site in NCP, from 26 Oct. to 26 Dec. 2017. The insights from this study include NOC mol. identification, concentration level, and NOC sources and origins. Specifically, we have identified and quantified >90 NOC species, with urea being the most abundant, accounting for 39.7 ± 4.7% of the total NOC followed by free amino acids (FAAs; 21.9 ± 1.5%), cyclic NOCs (15.3 ± 4.5%), amines (14.8 ± 1.5%), alkyl amides (5.8 ± 0.5%), isocyanates (1.7 ± 0.2%), and nitriles (1.1 ± 0.2%). The time series of FAAs was well correlated (r = 0.51-0.68, p < 0.01) with the organic marker of levoglucosan and was moderately correlated with Ox (r = 0.29-0.41, p < 0.01), suggesting biomass burning and secondary formation were important FAAs sources. We also show that amines can be oxidized and/or reacted by aqueous-phase processing to form secondary aerosols, which are further enhanced by the involvement of iron in the catalytic process. Using the receptor model of pos. matrix factorization (PMF), six factors were identified including coal combustion, crustal sources, biomass burning, industry-related sources, traffic emissions, and secondary aerosols. Source apportionment of NOC shows biomass burning was the dominant factor, accounting for 31.8% of the total NOCs. This study provides a unique dataset of NOCs at this regional background site in the NCP, with the insights of NOC chem. composition and sources gained in this study being important for future NOC modeling as well as NOC health effects studies. Science of the Total Environment published new progress about Atmospheric aerosols. 123-39-7 belongs to class amides-buliding-blocks, name is N-Methylformamide, and the molecular formula is C2H5NO, Related Products of amides-buliding-blocks.

Referemce:
Amide – Wikipedia,
Amide – an overview | ScienceDirect Topics

Ford, Hunter O. published the artcileComparison of single-ion conducting polymer gel electrolytes for sodium, potassium, and calcium batteries: influence of polymer chemistry, cation identity, charge density, and solvent on conductivity, Synthetic Route of 123-39-7, the main research area is polymer gel electrolyte sodium potassium calcium batteries conductivity.

From the standpoint of material diversification and sustainability, the development of so-called “”beyond lithium-ion”” battery chemistries is important for the future of energy storage. Na, K, and Ca are promising as the basis for battery chemistries in that these elements are highly abundant. Here, a series of single-ion conducting polymer electrolytes (SIPEs) for Na, K, and Ca batteries are synthesized and investigated. The two classes of metal cation neutralized SIPEs compared are crosslinked poly(ethylene glycol) dimethacrylate-x-styrene sulfonate (PEGDMA-SS) and poly(tetrahydrofuran) diacrylate-x-4-styrenesulfonyl (trifluoromethylsulfonyl)imide (PTHFDA-STFSI); three cation types, three charge densities, and four swelling states are examined The impact on conductivity of all of these parameters is studied, and in conjunction with small angle X-ray scattering (SAXS), it is found that promoting ion dissociation and preventing the formation of dense ionic aggregates facilitates ion transport. These results indicate many of the lessons learned from the Li SIPE literature can be translated to beyond Li chemistries. At 25°C, the best performing Na/K and Ca exchanged polymers yield active cation conductivity on the order of 10-4 S/cm and 10-6 S/cm, resp., for ethylene carbonate:propylene carbonate gelled SIPEs, and 10-5 S/cm and 10-7 S/cm, resp., for glyme gelled SIPEs.

Batteries (Basel, Switzerland) published new progress about Battery electrolytes. 123-39-7 belongs to class amides-buliding-blocks, name is N-Methylformamide, and the molecular formula is C2H5NO, Synthetic Route of 123-39-7.

Referemce:
Amide – Wikipedia,
Amide – an overview | ScienceDirect Topics

Kang, Kyongok published the artcileSolvent-dependent morphology and anisotropic microscopic dynamics of cellulose nanocrystals under electric fields, Related Products of amides-buliding-blocks, the main research area is review elec field cellulose nanocrystal anisotropic microscopic dynamic; solvent dependent morphol review.

Cellulose nanocrystals (CNCs) are interesting for the construction of biomaterials for energy delivery and packaging purposes. The corresponding processing of CNCs can be optimized through the variation of intercellulose interactions by employing different types of solvents, and thereby varying the degree of cellulose hydrogen bonding. The aim of this work is (i) to show how different types of solvents affect the self-assembled morphol. of CNCs, (ii) to study the microscopic dynamics and averaged orientations on the CNCs in aqueous suspensions, including the effect of externally imposed elec. fields, and (iii) to explore the nonlinear optical response of CNCs. The homogeneity of self-assembled chiral-nematic phase depends on both the polarity of the solvent and the CNC concentration The variation of the chiral-nematic pitch length with concentration, as determined from real-space and Fourier images, is found to be strongly solvent dependent. The anisotropic microdynamics of CNCs suspension exhibits two modes, related to diffusion parallel and perpendicular to the (chiral-) nematic director. We have found also the coupling between translational and orientational motion, due to existing correlation length of twisted nematic elasticity. Preliminary second-harmonic generation experiments are performed, which reveal that relatively high field strengths are required to reorient chiral-nematic domains of CNCs.

Physical Review E published new progress about Biological materials. 123-39-7 belongs to class amides-buliding-blocks, name is N-Methylformamide, and the molecular formula is C2H5NO, Related Products of amides-buliding-blocks.

Referemce:
Amide – Wikipedia,
Amide – an overview | ScienceDirect Topics

Jones, Christopher R. published the artcileCan a C-H···O Interaction Be a Determinant of Conformation?, HPLC of Formula: 359-38-6, the main research area is nonconventional hydrogen bond conformation crystal structure fluoroamide.

Whether nonconventional hydrogen bonds, such as the C-H···O interaction, are a consequence or a determinant of conformation is a long-running and unresolved issue. Here we outline a solid-state and quantum mech. study designed to investigate whether a C-H···O interaction can override the significant trans-planar conformational preferences of α-fluoroamide substituents. A profound change in dihedral angle from trans-planar(OCCF) to cis-planar(OCCF) observed on introducing an acceptor group for a C-H···O hydrogen bond is consistent with this interaction functioning as a determinant of conformation in certain systems. This testifies to the potential influence of the C-H···O hydrogen bond and is consistent with the assignment of this interaction as a contributor to overall conformation in both model and natural systems.

Journal of the American Chemical Society published new progress about Bond angle, dihedral. 359-38-6 belongs to class amides-buliding-blocks, name is 2,2-Difluoroacetamide, and the molecular formula is C2H3F2NO, HPLC of Formula: 359-38-6.

Referemce:
Amide – Wikipedia,
Amide – an overview | ScienceDirect Topics