Tag: M.W=50-100

Tomas-Mendivil, Eder published the artcileExploring Rhodium(I) Complexes [RhCl(COD)(PR₃)] (COD = 1,5-Cyclooctadiene) as Catalysts for Nitrile Hydration Reactions in Water: The Aminophosphines Make the Difference, Name: 2-Methoxyacetamide, the publication is ACS Catalysis (2014), 4(6), 1901-1910, database is CAplus.

Several rhodium(I) complexes, [RhCl(COD)(PR₃)], containing potentially cooperative phosphine ligands, have been synthesized and evaluated as catalysts for the selective hydration of organonitriles into amides in water. Among the different phosphines screened, those of general composition P(NR₂)₃ led to the best results. In particular, complex [RhCl(COD){P(NMe₂)₃}] was able to promote the selective hydration of a large range of nitriles in water without the assistance of any additive, showing a particularly high activity with heteroaromatic and heteroaliph. substrates. Employing this catalyst, the antiepileptic drug rufinamide was synthesized in high yield by hydration of 4-cyano-1-(2,6-difluorobenzyl)-1H-1,2,3-triazole. For this particular transformation, complex [RhCl(COD){P(NMe₂)₃}] was more effective than related ruthenium catalysts.

ACS Catalysis published new progress about 16332-06-2. 16332-06-2 belongs to ethers-buliding-blocks, auxiliary class Amine,Aliphatic hydrocarbon chain,Amide,Ether, name is 2-Methoxyacetamide, and the molecular formula is C11H10N4, Name: 2-Methoxyacetamide.

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

Wu, Shengde published the artcileFramework for Identifying Chemicals with Structural Features Associated with the Potential to Act as Developmental or Reproductive Toxicants, Category: ethers-buliding-blocks, the publication is Chemical Research in Toxicology (2013), 26(12), 1840-1861, database is CAplus and MEDLINE.

Developmental and reproductive toxicity (DART) end points are important hazard end points that need to be addressed in the risk assessment of chems. to determine whether or not they are the critical effects in the overall risk assessment. These hazard end points are difficult to predict using current in silico tools because of the diversity of mechanisms of action that elicit DART effects and the potential for narrow windows of vulnerability. DART end points have been projected to consume the majority of animals used for compliance with REACH; thus, addnl. nonanimal predictive tools are urgently needed. This article presents an empirically based decision tree for determining whether or not a chem. has receptor-binding properties and structural features that are consistent with chem. structures known to have toxicity for DART end points. The decision tree is based on a detailed review of 716 chems. (664 pos., 16 neg., and 36 with insufficient data) that have DART end-point data and are grouped into defined receptor binding and chem. domains. When tested against a group of chems. not included in the training set, the decision tree is shown to identify a high percentage of chems. with known DART effects. It is proposed that this decision tree could be used both as a component of a screening system to identify chems. of potential concern and as a component of weight-of-evidence decisions based on structure-activity relationships (SAR) to fill data gaps without generating addnl. test data. In addition, the chem. groupings generated could be used as a starting point for the development of hypotheses for in vitro testing to elucidate mode of action and ultimately in the development of refined SAR principles for DART that incorporate mode of action (adverse outcome pathways).

Chemical Research in Toxicology 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 C13H9FO, Category: ethers-buliding-blocks.

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

Bordwell, F. G. published the artcileAcidities of carboxamides, hydroxamic acids, carbohydrazides, benzenesulfonamides, and benzenesulfonohydrazides in DMSO solution, Name: 2-Methoxyacetamide, the publication is Journal of Organic Chemistry (1990), 55(10), 3330-6, database is CAplus.

A comparison of acidities of 6 series of analogous oxygen, nitrogen, and carbon acids in DMSO solution and the gas phase has shown that the element effect usually causes nitrogen acids to be more acidic than their carbon acid counterparts by an average of 17 ± 5 kcal/mol, and oxygen acids to be more acidic than their nitrogen counterparts by a like amount A much smaller difference was observed between the NH acidities of carboxamides and the CH acidities of ketones (1-2 kcal/mol in DMSO and 7-8 kcal/mol in the gas phase). Equilibrium acidities in DMSO for a number of substituted benzamides, acetamides, N-phenylacetamides, acetoxyhydroxamic acids, benzohydroxamic acids, carbohydrazides, and benzenesulfonamides are reported. Aceto- and benzohydroxamic acids were found to be 9.8 and 10.1 pK_HA units more acidic in DMSO, resp., than acetamide and benzamide. In each instance the effect of N-alkylation decreased the acidity more than did O-alkylation, which indicates that the parents are NH, rather than OH, acids in DMSO. Conclusive supporting evidence for the NH acid assignment was provided by the observation that the N-alkylhydroxamic acids exhibited strong homo-H-bonding, whereas the parent acids and the O-alkyl derivatives did not. Oxidation potentials of hydroxamate anions in DMSO are close to those of O-alkylhydroxamate ions, confirming that their conjugate acids are NH acids, but in MeOH they are close to those of N-alkylhydroxamate ion showing that their conjugate acids can act as OH acids in hydroxylic solvents. The N-alkyl- and O-alkylhydroxamic acids exhibited much stronger chelating power toward K⁺, Na⁺, and Li⁺ ions than did the parent acids.

Journal of Organic Chemistry published new progress about 16332-06-2. 16332-06-2 belongs to ethers-buliding-blocks, auxiliary class Amine,Aliphatic hydrocarbon chain,Amide,Ether, name is 2-Methoxyacetamide, and the molecular formula is C3H7NO2, Name: 2-Methoxyacetamide.

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

Asano, Yasuhisa published the artcileMicrobial degradation of nitrile compounds. Part V. Aliphatic nitrile hydratase from Arthrobacter sp. J-1. Purification and characterization, Category: ethers-buliding-blocks, the publication is Agricultural and Biological Chemistry (1982), 46(5), 1165-74, database is CAplus.

Aliphatic nitrile hydratase (I) was purified âˆ?90-fold with a yield of 10% from the cell-free extract of acetonitrile-grown Arthrobacter species J-1. Purified I was homogeneous by ultracentrifugation and disc gel electrophoresis. I catalyzed the stoichiometric hydration of acetonitrile to form acetamide. I was inducibly formed and then amidase, which hydrolyzed acetamide, was formed. The mol. weight of I was âˆ?20,000 by gel filtration. I was composed of 2 kinds of subunits with mol. weights of 24,000 and 27,000. The isoelec. point was 3.6. I was active toward low-mol.-weight of 2-5 C atoms. The K_m for acetonitrile was 5.78 mM. I was inactivated by SH-group reagents and competitively inhibited by KCN with a K_i of 1.5 μM.

Agricultural and Biological Chemistry published new progress about 16332-06-2. 16332-06-2 belongs to ethers-buliding-blocks, auxiliary class Amine,Aliphatic hydrocarbon chain,Amide,Ether, name is 2-Methoxyacetamide, and the molecular formula is C3H7NO2, Category: ethers-buliding-blocks.

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

Renaud, J. L. published the artcileRuthenium-catalysed enantioselective hydrogenation of trisubstituted enamides derived from 2-tetralone and 3-chromanone: Influence of substitution on the amide arm and the aromatic ring, Product Details of C3H7NO2, the publication is Advanced Synthesis & Catalysis (2003), 345(1+2), 230-238, database is CAplus.

Cyclic enamides, e.g. I, were prepared in one step from tetralone and chromanone derivatives and primary amides under acidic conditions. The enantioselective hydrogenation of these enamides bearing an endocyclic trisubstituted carbon-carbon double bond was performed at room temperature in the presence of ruthenium catalysts. The nature of the amide group had little influence on the enantioselectivity of the hydrogenation when mononuclear precatalysts were used. The presence of a coordinating atom at some specific position on the tetralone and chromanone skeleton led to a dramatic decrease of the enantiomeric excesses.

Advanced Synthesis & Catalysis published new progress about 16332-06-2. 16332-06-2 belongs to ethers-buliding-blocks, auxiliary class Amine,Aliphatic hydrocarbon chain,Amide,Ether, name is 2-Methoxyacetamide, and the molecular formula is C3H7NO2, Product Details of C3H7NO2.

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

Oguzcan, Semih published the artcileEnvironmental impact assessment model for substitution of hazardous substances by using life cycle approach, Formula: C4H10O2, the publication is Environmental Pollution (Oxford, United Kingdom) (2019), 254(Part_A), 112945, database is CAplus and MEDLINE.

Regulations that are indirectly driving the substitution of hazardous chems., such as the EU REACH regulation, necessitate improvements in chem. alternatives assessment frameworks. In those frameworks, life cycle thinking lacks some important aspects such as systematic and quant. occupational safety methods and risks from intermediate chems. that are not released to the environment under normal operating conditions. Concerns of companies about regulatory drivers regarding substances of very high concern often lead to inadequate evaluation of the baseline situation; an issue also overlooked by the frameworks. Moreover, life cycle assessment is optional for assessors with limited resources, such as small and medium enterprises. However, the success of substitution should not be evaluated without life cycle concerns. An environmental impact assessment model has been suggested to overcome these shortcomings of the chem. alternatives assessment frameworks. The model was applied to a case study of primed metal sheet production, where the company was driven to substitute reprotoxic 2-methoxypropanol used in their formulations. The results show that the proposed model is promising for solving the mentioned shortcomings, informing the assessor about substances of very high concern along the life cycle, and it has the potential to be further improved with the help of supporting software and databases.

Environmental Pollution (Oxford, United Kingdom) 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 C4H10O2, Formula: C4H10O2.

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

Beller, Matthias published the artcilePalladium-catalyzed reactions for fine chemical synthesis, Part 6. Efficient chemoenzymic synthesis of enantiomerically pure α-amino acids, Product Details of C3H7NO2, the publication is Chemistry – A European Journal (1998), 4(5), 935-941, database is CAplus.

A general two-step chemoenzymic synthesis for enantiomerically pure natural and nonnatural α-amino acids is presented. In the first step of the sequence, the ubiquitous educts aldehyde, amide and carbon monoxide react by palladium-catalyzed amidocarbonylation to afford the racemic N-acyl amino acids in excellent yields. In the second step, enzymic enantioselective hydrolysis yields the free optically pure α-amino acid and the other enantiomer as the N-acyl derivative, both in optical purities of 85-99.5% ee. The advantage of the chemoenzymic process compared to other amino acid synthesis are demonstrated by the preparation of various functionalized (-OR, -Cl, -F, -SR) α-amino acids on a 10-g scale.

Chemistry – A European Journal published new progress about 16332-06-2. 16332-06-2 belongs to ethers-buliding-blocks, auxiliary class Amine,Aliphatic hydrocarbon chain,Amide,Ether, name is 2-Methoxyacetamide, and the molecular formula is C3H7NO2, Product Details of C3H7NO2.

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

Goto, Akihiro published the artcileRh^I-catalyzed hydration of organonitriles under ambient conditions, SDS of cas: 16332-06-2, the publication is Angewandte Chemie, International Edition (2008), 47(19), 3607-3609, database is CAplus and MEDLINE.

The hydration of organonitriles catalyzed by a Rh^I(OMe) species under nearly pH-neutral and ambient conditions (25°C, 1 atm) is chemoselective and high-yielding (93 to 99%) and has a broad substrate scope, and may thus be complementary to enzymic hydration methods for the introduction of a terminal amido group (CONH₂) onto a carbon chain.

Angewandte Chemie, International Edition published new progress about 16332-06-2. 16332-06-2 belongs to ethers-buliding-blocks, auxiliary class Amine,Aliphatic hydrocarbon chain,Amide,Ether, name is 2-Methoxyacetamide, and the molecular formula is C3H7NO2, SDS of cas: 16332-06-2.

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

Babon, Juan C. published the artcileHydration of Aliphatic Nitriles Catalyzed by an Osmium Polyhydride: Evidence for an Alternative Mechanism, Application of 2-Methoxyacetamide, the publication is Inorganic Chemistry (2021), 60(10), 7284-7296, database is CAplus and MEDLINE.

The hexahydride OsH₆(PⁱPr₃)₂ competently catalyzes the hydration of aliphatic nitriles to amides. The main metal species under the catalytic conditions are the trihydride osmium(IV) amidate derivatives OsH₃{κ²-N,O-[HNC(O)R]}(PⁱPr₃)₂, which have been isolated and fully characterized for R = ⁱPr and ^tBu. The rate of hydration is proportional to the concentrations of the catalyst precursor, nitrile, and water. When these exptl. findings and d. functional theory calculations are combined, the mechanism of catalysis has been established. Complexes OsH₃{κ²-N,O-[HNC(O)R]}(PⁱPr₃)₂ dissociate the carbonyl group of the chelate to afford κ¹-N-amidate derivatives, which coordinate the nitrile. The subsequent attack of an external water mol. to both the C(sp) atom of the nitrile and the N atom of the amidate affords the amide and regenerates the κ¹-N-amidate catalysts. The attack is concerted and takes place through a cyclic six-membered transition state, which involves C_nitrile···O-H···N_amidate interactions. Before the attack, the free carbonyl group of the κ¹-N-amidate ligand fixes the water mol. in the vicinity of the C(sp) atom of the nitrile.

Inorganic Chemistry published new progress about 16332-06-2. 16332-06-2 belongs to ethers-buliding-blocks, auxiliary class Amine,Aliphatic hydrocarbon chain,Amide,Ether, name is 2-Methoxyacetamide, and the molecular formula is C3H7NO2, Application of 2-Methoxyacetamide.

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

Zhang, Zheng published the artcileUltrastrong Interaction and High Dispersibility of TS-1 on Polymer-Modified Carbon Nanotubes/Nickel Foam, Related Products of ethers-buliding-blocks, the publication is Industrial & Engineering Chemistry Research (2019), 58(41), 19033-19041, database is CAplus.

In this paper, monolithic TS-1 (a zeolitic material containing both silicon and titanium) was successfully synthesized on polymer-modified carbon nanotubes/nickel foam (PMTS-1). PMTS-1 had high surface areas and aggregated pores (confined pores formed in an aggregated structure), and TS-1 could be evenly dispersed on the surface, which could facilitate reactant transport and improve dispersibility of TS-1. TS-1 strongly interacted with the polymer-modified CNTs/NF and is highly dispersed because the PDDA-modification could enhance the positivity of CNTs/NF. PMTS-1 was beneficial to the adsorption of the reactant propylene and the desorption of the product propylene oxide, which reduced the side reaction of the deep oxidation of propylene oxide, pore blocking, and coke formation. Also, the adsorption capacity of PMTS-1 to H₂O₂ was enhanced, which created a microenvironment conducive to the forward reaction. After the reaction, PMTS-1 was easily separated from the reactants, which offered an economical application prospect.

Industrial & Engineering Chemistry Research 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 C12H21NO7, Related Products of ethers-buliding-blocks.

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