Month: November 2022

Schwanz, Thiago G. published the artcileAnalysis of chemosensory markers in cigarette smoke from different tobacco varieties by GC×GC-TOFMS and chemometrics, Formula: C6H4N2, the main research area is chemosensory marker cigarette smoke flavor tobacco curing chemometric; Chemosensory markers; Comprehensive gas chromatography; Flavour; PLS-DA; Smoke; Tobacco.

Com. cigarettes are made from a blend of different tobacco varieties, which in turn are the results of different agronomic practices and post-harvest curing processes. The highly complex mixture of smoke compounds reflects each tobacco variety and the levels of sensory-relevant markers. Therefore, the aim of this work was to identify potential relevant chemosensory markers in the mainstream smoke of four main types of com. tobaccos and establish any possible relationship between them and the tobacco growing/curing practices. The tobacco samples were segregated into four segments: (1) three curing stages of flue-cured Virginia, (2) three curing stages of air-cured Burley, (3) three geo-regions of sun-cured Oriental and (4) three different process applied to tobacco. One hundred and twenty cigarettes (10 batches per flavor category) were produced and smoked under standard machine-smoking protocols. The mainstream smoke samples collected were extracted and analyzed by GC × GC TOFMS. The processed data was analyzed by partial least square discriminant anal. (PLS-DA) and the selectivity ratio was used to identify key chemosensory markers responsible for the four segments. All models had sensitivity and specificity equal to unity. Flue-cured Virginia (193 markers) and air-cured Burley (184 markers) showed a similar trend for O-heterocycles markers in the lighter leaf colors and N-heterocycles in the darker leaf colors post-processing, but they had compounds of different flavor descriptions, e. g. sweet and nutty. The three geo-regions of sun-cured Oriental (290 markers) also presented O-heterocycles markers in correlation with leaf sugar contents in addition of sucrose esters markers. The three unusually processed tobacco generated many chem. markers (436 markers), some derived from the so-called Cavendish fermentation process with sweet, spicy and peppery notes, whereas the dark fermented air-cured tobacco presented similar descriptors as air-cured Burley. In addition, some polycyclic aromatic hydrocarbons (PAH) were detected as markers from the fire-curing process. The PLS-DA with selectivity ratio evidenced total of 1098 chemosensory markers in cigarette smoke, in which 173 were tentatively identified.

Talanta published new progress about Biomarkers. 100-70-9 belongs to class nitriles-buliding-blocks, name is Picolinonitrile, and the molecular formula is C6H4N2, Formula: C6H4N2.

Referemce:
Nitrile – Wikipedia,
Nitriles – Chemistry LibreTexts

Hendrick, Charles E. published the artcileInsertion of Arynes into N-Halo Bonds: A Direct Approach to o-Haloaminoarenes, Quality Control of 204078-32-0, the main research area is haloaminoarene regioselective preparation; insertion aryne nitrogen halo bond.

A new approach to access o-haloaminoarenes has been achieved by insertion of arynes into a nitrogen-halide bond (N-X). This transition-metal-free transformation displays a broad substrate scope of arynes, good compatibility with functional groups, and high regioselectivity. Representative transformations of the o-haloaminoarenes are described to highlight their utility for rapid access to diversely functionalized aminoarene derivatives E.g., treating morpholine with NCS, followed by addition of 2-(trimethylsilyl)phenyl triflate and CsF, gave 67% o-haloaminoarene derivative (I).

Organic Letters published new progress about Amines Role: SPN (Synthetic Preparation), PREP (Preparation) (halo). 204078-32-0 belongs to class nitriles-buliding-blocks, name is 2-Morpholinobenzonitrile, and the molecular formula is C11H12N2O, Quality Control of 204078-32-0.

Referemce:
Nitrile – Wikipedia,
Nitriles – Chemistry LibreTexts

Roy, Bivas Chandra published the artcileTandem synthesis of quinazolinone scaffolds from 2-aminobenzonitriles using aliphatic alcohol-water system, Category: nitriles-buliding-blocks, the main research area is aminobenzonitrile aliphatic alc water tandem hydration dehydrogenative coupling; quinazolinone preparation green chem.

Ru(II) complex catalyzed tandem synthesis of quinazolinone derivatives is reported here. In this sustainable protocol, 2-aminobenzonitriles were directly transformed to quinazolinones using alc.-water system. A variety of quinazolinones was successfully synthesized in good to excellent yields by utilizing challenging methanol and aliphatic alcs. The practical applicability of the protocol was extended by preparative scale synthesis of various heterocycles as well as natural products. To understand the mechanism of this protocol, several control experiments and DFT studies were carried out. Based on the DFT calculations, a metal-ligand cooperative mechanism was proposed for this system.

Catalysis Science & Technology published new progress about Aromatic nitriles Role: RCT (Reactant), RACT (Reactant or Reagent) (2-aminoaryl). 1885-29-6 belongs to class nitriles-buliding-blocks, name is 2-Aminobenzonitrile(Flakes or Chunks), and the molecular formula is C7H6N2, Category: nitriles-buliding-blocks.

Referemce:
Nitrile – Wikipedia,
Nitriles – Chemistry LibreTexts

Yang, Fanpeng published the artcilePalladium-Catalyzed Coupling Reaction of o-Alkenyl Chloroformylanilines with o-Alkynylanilines: An Approach to Indolylmethyl Oxindole, Application In Synthesis of 1885-29-6, the main research area is indolylmethyl oxindole preparation; ortho alkenyl chloroformylaniline alkynylaniline cascade coupling palladium catalyst.

A palladium-catalyzed cascade Heck cyclization/3-(2-oxindolyl)methylation on intramol. amination of o-alkynylanilines for the synthesis of indolylmethyl oxindoles is developed. This protocol exhibits high efficiency, good functional group tolerance and scalability from easily accessible starting materials. In this transformation, chloroformylaniline was used as an oxidative reagent and o-alkynylaniline was used as a 3-indolyl precursor.

Asian Journal of Organic Chemistry published new progress about Amines, alkynyl Role: RCT (Reactant), SPN (Synthetic Preparation), RACT (Reactant or Reagent), PREP (Preparation). 1885-29-6 belongs to class nitriles-buliding-blocks, name is 2-Aminobenzonitrile(Flakes or Chunks), and the molecular formula is C7H6N2, Application In Synthesis of 1885-29-6.

Referemce:
Nitrile – Wikipedia,
Nitriles – Chemistry LibreTexts

Hu, Xiaoping published the artcileNickel-Catalyzed β-Regioselective Amination/Cyclization of Ynamide-Nitriles with Amines: Synthesis of Functionalized 3-Aminoindoles and 4-Aminoisoquinolines, Application In Synthesis of 1885-29-6, the main research area is indole amino aryliminobenzyl preparation; ynamide nitrile regioselective amination cyclization aromatic amine nickel catalyst.

A highly regioselective nickel/Lewis acid catalyzed amination/cyclization of ynamide-nitriles I (R1 = Ph, 4-MeOC6H4, 2-FC6H4, 2-thienyl, etc.; R2 = Me, 4-FC6H4, 4-MeC6H4, 4-MeOC6H4) with amines R3NH2 (R3 = Ph, 4-FC6H4, 3,5-Me2C6H3, 1-naphthyl, 2-thiazolyl, etc.) involving β-addition has been developed. The reaction offers an attractive and efficient route for the synthesis of 3-aminoindoles II. A 4-aminoisoquinoline was also obtained via this approach. The R2SO2-group on the ynamide acts as a directing group to produce the alkenyl nickel species with high regioselectivity.

Organic Letters published new progress about Amination catalysts. 1885-29-6 belongs to class nitriles-buliding-blocks, name is 2-Aminobenzonitrile(Flakes or Chunks), and the molecular formula is C7H6N2, Application In Synthesis of 1885-29-6.

Referemce:
Nitrile – Wikipedia,
Nitriles – Chemistry LibreTexts

Gu, Bo published the artcileCatalytic Fast Pyrolysis of Sewage Sludge over HZSM-5: A Study of Light Aromatics, Coke, and Nitrogen Migration under Different Atmospheres, Quality Control of 100-70-9, the main research area is wastewater treatment sludge catalytic fast pyrolysis HZSM5 catalyst; nickel cobalt loaded HZSM5 pyrolysis catalyst; sludge pyrolysis temperature atm effect light aromatic liquid byproduct; fixed bed reactor sludge pyrolysis aromatic liquid carbon nitrogen; pyrolysis bio oil coke light aromatic liquid byproduct.

catalytic fast pyrolysis of wastewater sludge was conducted to assess pyrolysis temperature and atm., and catalysts effect on C and N distribution in a fixed-bed reactor. a H2 atmosphere had the lowest C selectivity of solid products and the highest gaseous product yield over HZSM-5 (HZ) at the same temperature vs. Ar and steam atmospheres. higher temperature led to increased C selectivity of gaseous products and decreased C selectivity of solids. H2 increased the C yield of light aromatics (LA); steam reduced generation of LA. over 0.5 Ni-HZ, H2 had the highest LA C yield (11.4%) vs. 1.6% from non-catalytic fast pyrolysis of sludge. higher temperatures, H2 and steam atmospheres, and metal-loaded HZ promoted N transfer to gaseous products. the highest N yield (i.e., NH3) of 55.6% was obtained from sludge pyrolysis over HZ at 700° in a H2 atmosphere.

Industrial & Engineering Chemistry Research published new progress about sludge pyrolysis gas byproducts). 100-70-9 belongs to class nitriles-buliding-blocks, name is Picolinonitrile, and the molecular formula is C6H4N2, Quality Control of 100-70-9.

Referemce:
Nitrile – Wikipedia,
Nitriles – Chemistry LibreTexts

Wang, Shichun published the artcileInfluence of the 1,3-Bis(trimethylsilyl)cyclopentadienyl Ligand on the Reactivity of the Uranium Phosphinidene [η5-1,3-(Me3Si)2C5H3]2U(:P-2,4,6-iPr3C6H2)(OPPh3), Application of Phthalonitrile, the main research area is insertion alkyne diazabutadiene unsaturated mol uranium metallocene phosphinidene complex; uranium metallaheterocycle preparation insertion unsaturated mol phosphinidene metallocene; crystal structure uranium heterocycle metallocene phosphinidene complex; mol structure uranium heterocycle metallocene phosphinidene complex.

At ambient temperature [η5-1,3-(Me3Si)2C5H3]2U(Cl)Me (3) reacts with 2,4,6-iPr3C6H2PHK in toluene in the presence of Ph3PO to yield the Lewis base supported terminal uranium phosphinidene metallocene [η5-1,3-(Me3Si)2C5H3]2U(=P-2,4,6-iPr3C6H2)(OPPh3) (4), whose structure and reactivity were probed. When it is treated with conjugated alkynes and diazabutadienes, compound 4 acts as a masked synthon for the divalent uranium fragment [η5-1,3-(Me3Si)2C5H3]2UII to give [η5-1,3-(Me3Si)2C5H3][η5-1-(CH2Me2Si)-3-(Me3Si)C5H3]U[(1-(2,4,6-iPr3C6H2)-2,5-Ph2C4HP)] (7) and [η5-1,3-(Me3Si)2C5H3]2U[N(p-tolyl)CH(P-2,4,6-iPr3C6H2)CHN(p-tolyl)] (8), resp. Nevertheless, in the presence of internal alkynes and various heterounsatd. mols. such as imines, carbodiimides, isothiocyanates, aldehydes, nitriles, isonitriles, and organic azides complex 4 affords metallaheterocycles, sulfido, oxido, and imido complexes in good yields. Furthermore, when it is exposed to the diazene PhN:NPh, complex 4 converts to the four-membered heterocycle [η5-1,3-(Me3Si)2C5H3]2U[N(Ph)P(2,4,6-iPr3C6H2)N(Ph)] (12) in good yield.

Organometallics published new progress about Aldehydes Role: RCT (Reactant), RACT (Reactant or Reagent). 91-15-6 belongs to class nitriles-buliding-blocks, name is Phthalonitrile, and the molecular formula is C8H4N2, Application of Phthalonitrile.

Referemce:
Nitrile – Wikipedia,
Nitriles – Chemistry LibreTexts

Pathaw, Larica published the artcileSynthesis, crystal structure, bovine serum albumin binding studies of 1,2,4-triazine based copper(I) complexes, Safety of Picolinonitrile, the main research area is pyridyltriazole copper complex preparation crystal mol structure; bovine serum albumin binding copper pyridyltriazole complex.

A series of new copper complexes have been synthesized and completely characterized by pivotal anal. techniques. The coordination geometry around copper(I) complex was best described as distorted tetrahedral geometry. The binding of bovine serum albumin with Cu(I) complexes are also been investigated. The Stern-Volmer anal. on quenching data exhibits the presence of the static quenching mechanism. The binding constants were calculated using modified Stern-Volmer, Lineweaver-Burk and Scatchard plots. All the complexes exhibit the binding constants in the order of 104. Thus, these results can contribute to the development of Cu(I) based drugs.

Journal of Molecular Structure published new progress about Coordination sphere. 100-70-9 belongs to class nitriles-buliding-blocks, name is Picolinonitrile, and the molecular formula is C6H4N2, Safety of Picolinonitrile.

Referemce:
Nitrile – Wikipedia,
Nitriles – Chemistry LibreTexts

Gao, Liuzhou published the artcile1,2-Silylpyridylation Reaction of Aryl Alkenes with Silylboronate, Application of Picolinonitrile, the main research area is silylboronate silylpyridylation reaction of aryl alkene cyanopyridine DFT; silylalkylated pyridine preparation.

A metal-free silyl-pyridylation of alkenes using silyl boronates and B2pin2 through a pyridine-mediated B-interelement activation was demonstrated, which provides a practical strategy for a variety of C4-silylalkylated pyridines. DFT calculations and control experiments show that the reaction proceeds through a silyl radical addition/radical-radical coupling sequence. This protocol features a broad substrate scope and excellent functional group compatibility, and thus it showcases great potential in the late-stage modification of bioactive mols.

Organic Letters published new progress about Amination (1,2-silylpyridylation reaction). 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

Tian, Jun-Jie published the artcileIntramolecular Cyclizations of Vinyl-Substituted N,N-Dialkyl Arylamines Enabled by Borane-Assisted Hydride Transfer, Quality Control of 1885-29-6, the main research area is arylamine dialkyl vinyl borane hydride transfer cyclization catalyst; tetrahydrobenzoquinoline preparation.

Catalytic amounts of B(C6F5)3 have been found to be able to promote the intramol. cyclization of vinyl-substituted N,N-dialkyl arylamines to afford nitrogen-containing heterocycles I (R = Me, Bn, n-pentyl; R1 = H, Ph, n-Bu; R2 = Ph, 4-EtC6H4, 3-MeC6H4, Me, n-Pr, etc.). Our mechanistic studies indicate the reaction is initiated by abstraction of an α-hydride from an N-alkyl substituent by B(C6F5)3, which is followed by cyclization, and is concluded by delivery of the hydride to the cyclic cationic intermediate. The dual roles of B(C6F5)3, first as an oxidant and then as a hydride-carrying reductant, have enabled a rare redox-neutral cyclization process between a sp3 carbon and an electron-rich olefin without using a transition metal or an external oxidant.

ACS Catalysis published new progress about Boranes Role: CAT (Catalyst Use), USES (Uses). 1885-29-6 belongs to class nitriles-buliding-blocks, name is 2-Aminobenzonitrile(Flakes or Chunks), and the molecular formula is C7H6N2, Quality Control of 1885-29-6.

Referemce:
Nitrile – Wikipedia,
Nitriles – Chemistry LibreTexts