Category: nitriles-buliding-blocks

Fernando Gomollon-Bel published the artcileShaking up industrial chemistry, Formula: C8H4N2, the main research area is review mechanochem industrial chem.

Grinding stuff is probably one of the oldest ways to run a chem. reaction. For example, in the fourth century BCE, people extracted mercury from cinnabar by grinding the mineral with vinegar in copper bowls. Later, as the chem. industry developed in the 19th century, the German chem. company, BASF, used giant mills called muhlenbetriebe to grind materials into synthetic organic dyes. Factory workers would load a ball mill′s large cylindrical drum with starting material and metal balls. The balls would grind the materials as the drum spun. One of the dyes made in these mills was Heliogen blue, an intense sapphire dye made by crumbling copper chloride and phthalonitrile. “”It is a really old example of a mechanochem. reaction, run without a solvent in a ball mill kiln,”” Martin Viertelhaus, a principal scientist at BASF, said at the “”Mechanochem. Meets Industry”” online workshop in Feb. 2021. In recent decades, Mechanochem. offers a greener way to make mols., but chemists need to scale it up for industry. Researchers at MOF Technologies work with extruders to use mechanochem. to develop new materials.

Chemical & Engineering News published new progress about Grinding (machining). 91-15-6 belongs to class nitriles-buliding-blocks, name is Phthalonitrile, and the molecular formula is C8H4N2, Formula: C8H4N2.

Referemce:
Nitrile – Wikipedia,
Nitriles – Chemistry LibreTexts

Babon, Juan C. published the artcileDihydroboration of Alkyl Nitriles Catalyzed by an Osmium-Polyhydride: Scope, Kinetics, and Mechanism, Name: 2-(3-Benzoylphenyl)propanenitrile, the main research area is dihydroboration alkyl nitrile catalyst osmium polyhydride kinetics mechanism; diboryl amine preparation.

Complex OsH6(PiPr3)2 is an efficient catalyst precursor for the addition of pinacolborane and catecholborane to the C-N triple bond of alkyl nitriles. In this way, a variety of N,N-diborylamines have been isolated and fully characterized, including 13 derivatives not described so far. The range of nitriles used is wide and comprises substrates having unfunctionalized linear and branched chains, and functionalized chains with methoxide, trifluoromethyl, aryl, pyridyl, benzoyl, or cyanide groups. Kinetic studies demonstrate that the overall process consists of two consecutive irreversible reactions: the catalytic metal-promoted monohydroboration of the nitrile to afford the borylimine and the metal-free stoichiometric hydroboration of the latter to give the diborylamine. The mechanism of the hydroboration has been established by combining the kinetic anal. of the catalysis, stoichiometric reactions, and DFT calculations The rate-determining step of the catalysis is the insertion of the C-N triple bond of the nitrile into the Os-B bond of an osmium-σ-borane intermediate and is regiodirected by the nucleophilicity of the nitrogen atom and the electrophilicity of the carbon atom of the nitrile.

Organometallics published new progress about Activation enthalpy. 42872-30-0 belongs to class nitriles-buliding-blocks, name is 2-(3-Benzoylphenyl)propanenitrile, and the molecular formula is C16H13NO, Name: 2-(3-Benzoylphenyl)propanenitrile.

Referemce:
Nitrile – Wikipedia,
Nitriles – Chemistry LibreTexts

Vik, Erik C. published the artcileTransition-State Stabilization by n→π* Interactions Measured Using Molecular Rotors, SDS of cas: 1885-29-6, the main research area is Transition State stabilization Rotors NMR rotational barrier.

A series of 16 mol. rotors ,e.g. I (R= SMe), were synthesized to investigate the ability of n→π* interactions to stabilize transition states (TSs) of bond rotation. Steric contributions to the rotational barrier were isolated using control rotors, which could not form n→π* interactions. Rotors with strong acceptor π* orbitals, such as ketones and aldehydes, had greatly increased rates of rotation. The TS stabilization of up to ∼10 kcal/mol was consistent with the formation of a strong n→π* stabilization between the imide carbonyl oxygens and the ortho R group in the planar TS. Computational studies effectively modeled the TS stabilization and geometry, and NBO anal. confirmed the role of n→π* interactions in stabilizing the TS.

Journal of the American Chemical Society published new progress about Activation enthalpy. 1885-29-6 belongs to class nitriles-buliding-blocks, name is 2-Aminobenzonitrile(Flakes or Chunks), and the molecular formula is C7H6N2, SDS of cas: 1885-29-6.

Referemce:
Nitrile – Wikipedia,
Nitriles – Chemistry LibreTexts

Zhou, Xukai published the artcileOlefination via Cu-Mediated Dehydroacylation of Unstrained Ketones, Recommanded Product: Picolinonitrile, the main research area is olefin preparation; unstrained ketone dehydroacylation copper mediated.

The dehydroacylation of ketones to olefins was realized under mild conditions, which exhibited a unique reaction pathway involving aromatization-driven C-C cleavage to remove the acyl moiety, followed by Cu-mediated oxidative elimination to form an alkene between the α and β carbons. The newly adopted N’-methylpicolinohydrazonamide (MPHA) reagent was key to enable efficient cleavage of ketone C-C bonds at room temperature Diverse alkyl- and aryl-substituted olefins, dienes and special alkenes were generated with broad functional group tolerance. Strategic applications of this method were also demonstrated.

Journal of the American Chemical Society published new progress about Acylation (dehydro). 100-70-9 belongs to class nitriles-buliding-blocks, name is Picolinonitrile, and the molecular formula is C6H4N2, Recommanded Product: Picolinonitrile.

Referemce:
Nitrile – Wikipedia,
Nitriles – Chemistry LibreTexts

Becker, Peter published the artcileDesigning Homogeneous Bromine Redox Catalysis for Selective Aliphatic C-H Bond Functionalization, HPLC of Formula: 73217-11-5, the main research area is sulfonamide bromine mCPBA light oxidation intramol amination catalyst; pyrrolidine sulfonyl preparation; oxaziridine sulfonyl preparation; C−H functionalization; Hofmann-Löffler reaction; amination; bromine; catalysis.

The potential of homogeneous oxidation catalysis employing bromine has remained largely unexplored. We herein show that the combination of a tetraalkylammonium bromide and meta-chloroperbenzoic acid offers a unique catalyst system for the convenient and selective oxidation of saturated C(sp3)-H bonds upon photochem. initiation with day light. This approach enables remote, intramol., position-selective C-H amination as demonstrated for 20 different examples. For the first time, an N-halogenated intermediate was isolated as the active catalyst state in a catalytic Hofmann-Loffler reaction. In addition, an expeditious one-pot synthesis of N-sulfonyl oxaziridines from N-sulfonamides was developed and exemplified for 15 transformations. These pioneering examples provide a change in paradigm for mol. catalysis with bromine.

Angewandte Chemie, International Edition published new progress about Amination (intramol.). 73217-11-5 belongs to class nitriles-buliding-blocks, name is 2-(2-(Bromomethyl)phenyl)acetonitrile, and the molecular formula is C9H8BrN, HPLC of Formula: 73217-11-5.

Referemce:
Nitrile – Wikipedia,
Nitriles – Chemistry LibreTexts

Arunachalam, Rajendran published the artcileCatalytic Conversion of Carbon Dioxide Using Binuclear Double-Stranded Helicates: Cyclic Carbonate from Epoxides and Diol, Application of Picolinonitrile, the main research area is transition metal Schiff pyridylaldehyde malonohydrazide succinohydrazide glutarohydrazide complex preparation; carbonation catalyst transition metal Schiff pyridylaldehyde malonohydrazide succinohydrazide glutarohydrazide; crystal structure transition metal Schiff pyridylaldehyde malonohydrazide succinohydrazide glutarohydrazide.

The construction of sophisticated mol. architectures from chem. subunits requires careful selection of the spacers, precise synthetic strategies, and substantial efforts. The authors report a series of binuclear double-stranded helicates synthesized from different combinations of pyridyl hydrazone-based multidentate ligands (H2L1, H2L2, H2L3) by increasing the methylene spacer and transition metals (Co, Ni, and Zn). The ligands H2L1 (N’1,N’3-bis((E)-pyridin-2-ylmethylene)malonohydrazide), H2L2 (N’1,N’4-bis((E)-pyridin-2-ylmethylene)succinohydrazide), and H2L3 (N’1,N’5-bis((E)-pyridin-2-ylmethylene)glutarohydrazide) and their resp. complexes with Co, Ni, and Zn were obtained. Single-crystal X-ray diffraction studies of these binuclear metallohelicates confirm the double-stranded helical structure of the complexes derived from H2L2. The set of helicates Co-1, Co-2, and Co-3; Ni-1, Ni-2, and Ni-3; and Zn-1, Zn-2, and Zn-3 were investigated for its catalytic activity in the cyclic carbonate formation reaction. Intriguingly, among the synthesized catalyst, Co-1 was found to be better in terms of conversions with the calculated TOF (turnover frequency) of 128/h. The catalytic performance was significantly improved by adding 0.2 mmol of tetrabutylammonium bromide by achieving 76% conversion in 30 min, with the observed TOF of 15,934 h-1/mol. and 7967 h-1/Co center. The results obtained herein show that the double-stranded helicates are effective catalysts for converting both terminal and non-terminal epoxides into their corresponding cyclic carbonates. The striking feature of this catalytic protocol lies in demonstrating the catalytic activity for the conversion of diol to cyclic carbonate, and the detailed kinetic experiments tempted us to propose a tentative reaction mechanism for this conversion.

ACS Omega published new progress about Carbonation catalysts. 100-70-9 belongs to class nitriles-buliding-blocks, name is Picolinonitrile, and the molecular formula is C6H4N2, Application of Picolinonitrile.

Referemce:
Nitrile – Wikipedia,
Nitriles – Chemistry LibreTexts

Yamamoto, Keizou published the artcileProduction of R-(-)-ketoprofen from an amide compound by Comamonas acidovorans KPO-2771-4, Synthetic Route of 42872-30-0, the main research area is ketoprofen isomer manufacture Comamonas; amidase ketoprofen forming stereospecificity Comamonas.

R-(-)-ketoprofen (I) was produced from racemic 2-(3′-benzoylphenyl)propionamide (keto-amide) by the isolated bacterial strain C. acidovorans KPO-2771-4. Sodium fumarate as the C source and 2-azacyclononanone or isobutyronitrile as the enhancer in the culture medium were effective for bacterial growth and the enhancement of I-producing activity. I produced from the keto-amide by resting cells was present in 99% enantiomeric excess. C. acidovorans KPO-2771-4 has an R-enantioselective amidase for keto-amide because the purified amidase from the bacterium hydrolyzed keto-amide, producing optically pure I and NH3.

Applied and Environmental Microbiology published new progress about Comamonas acidovorans. 42872-30-0 belongs to class nitriles-buliding-blocks, name is 2-(3-Benzoylphenyl)propanenitrile, and the molecular formula is C16H13NO, Synthetic Route of 42872-30-0.

Referemce:
Nitrile – Wikipedia,
Nitriles – Chemistry LibreTexts

Reich, Siegfried H. published the artcileSubstituted Benzamide Inhibitors of Human Rhinovirus 3C Protease: Structure-Based Design, Synthesis, and Biological Evaluation, Related Products of nitriles-buliding-blocks, the main research area is unsaturated cinnamate ester benzamide preparation rhinovirus protease inhibitor; library unsaturated cinnamate ester benzamide preparation rhinovirus protease inhibitor; structure benzamide rhinovirus protease inhibition; crystal structure rhinovirus 3C protease benzamide unsaturated cinnamate ester.

A series of nonpeptide benzamide-containing inhibitors of human rhinovirus (HRV) 3C protease (3CP) was identified using structure-based design. The design, synthesis, and biol. evaluation of these inhibitors are reported. A Michael acceptor was combined with a benzamide core mimicking the P1 recognition element of the natural 3CP substrate. α,β-Unsaturated cinnamate esters such as I irreversibly inhibited the 3CP and displayed antiviral activity (EC50 0.60 μM, HRV-16 infected H1-HeLa cells). On the basis of cocrystal structure information, a library of substituted benzamide derivatives was prepared using parallel synthesis on solid support. A 1.9 Å cocrystal structure of a benzamide inhibitor II in a complex with 3CP revealed a binding mode similar to that initially modeled wherein covalent attachment of the nucleophilic cysteine residue is observed Benzamide-containing unsaturated ketone inhibitors displayed potent reversible inhibition but were inactive in the cellular antiviral assay and were found to react with nucleophilic thiols such as DTT.

Journal of Medicinal Chemistry published new progress about Combinatorial library. 269411-71-4 belongs to class nitriles-buliding-blocks, name is 3-Amino-5-methoxybenzonitrile, and the molecular formula is C8H8N2O, Related Products of nitriles-buliding-blocks.

Referemce:
Nitrile – Wikipedia,
Nitriles – Chemistry LibreTexts

Wong, Ying-Chieh published the artcileLewis Basic Sulfide Catalyzed Electrophilic Bromocyclization of Cyclopropylmethyl Amide, Application In Synthesis of 97009-67-1, the main research area is electrophilic bromocyclization cyclopropylmethyl amide Lewis base sulfide catalyst; oxazoline oxazine stereoselective preparation.

A Lewis basic sulfide catalyzed electrophilic bromocyclization of cyclopropylmethyl amide has been developed. The catalytic protocol is applicable to both 1,1- and 1,2-substituted cyclopropylmethyl amides, giving oxazolines and oxazines, e.g. I and II, in good yields and excellent diastereoselectivity.

Organic Letters published new progress about Cyclization catalysts. 97009-67-1 belongs to class nitriles-buliding-blocks, name is 1-(4-Fluorophenyl)cyclopropanecarbonitrile, and the molecular formula is C10H8FN, Application In Synthesis of 97009-67-1.

Referemce:
Nitrile – Wikipedia,
Nitriles – Chemistry LibreTexts

Ohno, Hajime published the artcileDirect dimethyl carbonate synthesis from CO2 and methanol catalyzed by CeO2 and assisted by 2-cyanopyridine: a cradle-to-gate greenhouse gas emission study, Application In Synthesis of 100-70-9, the main research area is dimethyl carbonate carbon dioxide methanol CeO2 cyanopyridine greenhouse gas.

The direct synthesis of di-Me carbonate (DMC) from CO2 and methanol is an attractive alternative route utilizing CO2 instead of toxic phosgene as a carbonate source. The route is thermodynamically difficult because of the equilibrium limitation of the reaction 2CH3OH + CO2 → (CH3O)2O + H2O. In addition, the azeotrope formed by DMC and methanol makes the separation of DMC from unreacted methanol complex and energy intensive. The use of CeO2 and 2-cyanopyridine as a catalyst and dehydration agent solved both the equilibrium constraint and the separation challenge. In this study, the direct DMC synthesis from CO2 and methanol over CeO2 with 2-cyanopyridine was evaluated in terms of greenhouse gas (GHG) emission with the aid of process simulation. It was validated that the cradle-to-gate greenhouse gas emission attributed to the product of this system (0.39 kg-CO2-eq per kg-DMC) becomes much lower than that in conventional commercialized processes. The heat exchange in the process reduced the emission further to 0.34 kg-CO2-eq per kg-DMC. Among the items associated with emissions, methanol consumption shared the largest part (0.63 kg-CO2-eq per kg-DMC), while the converted CO2 was regarded as an important offset (-0.49 kg-CO2-eq per kg-DMC). It is due to the use of the typical methanol production from natural gas (0.88 kg-CO2-eq per kg-methanol). It suggests that if the methanol production with its associated GHG emission accounting for less than 0.41 or 0.34 kg-CO2-eq per kg-methanol is applicable for with or without heat-exchanging cases, the presented process achieves neg. emission. Furthermore, based on the results, the requirements for the practical process implementation are discussed by comparing the lifecycle GHG emission results with other DMC synthesis routes.

Green Chemistry published new progress about Dehydration catalysts. 100-70-9 belongs to class nitriles-buliding-blocks, name is Picolinonitrile, and the molecular formula is C6H4N2, Application In Synthesis of 100-70-9.

Referemce:
Nitrile – Wikipedia,
Nitriles – Chemistry LibreTexts