Month: November 2022

Vijit, Kumar published the artcileTetrel and Pnictogen Bonds Complement Hydrogen and Halogen Bonds in Framing the Interactional Landscape of Barbituric Acids, Synthetic Route of 598-50-5, the main research area is tetrel pnictogen hydrogen halogen bond barbituric acid.

Exptl. and theor. studies of fluoro-, chloro-, and bromo-substituted derivatives of barbituric acid and indandione show that imide protons form short hydrogen bonds and bromine or, to a lesser extent, chlorine atoms form halogen bonds. The imide nitrogen atoms act as effective pnictogen bond donors, while C(sp2) and C(sp3) atoms act as tetrel bond donors; the resulting N···O and C···O close interactions are a distinctive feature of crystal lattices in all compounds Importantly, halogen atoms promote the electrophilicity of C(sp3) sites and favor the formation of C(sp3)···O close contacts. Oxygen atoms of carbonyl groups of barbituric and indandione units or of water mols. function as the interaction acceptor sites: namely, they donate electron d. to hydrogen, halogen, nitrogen, and carbon atoms. Modeling of various barbituric acid derivatives indicates that the pos. electrostatic potentials of π-holes orthogonal to the C(sp2) carbons and σ-holes on the elongation of quasi-axial F/Cl/Br-C(sp3) bonds merge to produce a single well-defined point of the most pos. electrostatic potential on one face of the barbituric acids. This single local maximum of the potential on the mol. face is close to the site occupied by the oxygen forming the C(sp3)···O, and C(sp2)···O, short contacts observed in crystals.

Crystal Growth & Design published new progress about Crystal structure. 598-50-5 belongs to class isoquinoline, name is 1-Methylurea, and the molecular formula is C2H6N2O, Synthetic Route of 598-50-5.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Pham, Hang T. published the artcileSynthesis of 2-Arylbenzothiazol-5-amines from N,N-Dialkyl-3-nitroanilines, Category: isoquinoline, the main research area is arylbenzothiazolamine preparation DABCO base; dialkylnitroarene sulfur methylazaarene arylacetic acid cyclization multicomponent reaction.

A simple method for coupling of N, N-dialkyl-3-nitroarenes, I (R1 = Me2N, morpholinyl, 4-Me-piperazinyl,etc.) elemental sulfur, and activated sp3 C-H bonds in 2-methylazaarenes or arylacetic acids to afford derivatives of 2-arylbenzothiazol-5-amines II (R2 = Ph, 4-MeC6H4, 2-pyridinyl, 2-thiphenyl, etc. ) is described. Only DABCO base was required, and many heterocycles such as imidazoles, oxazoles, quinolines, and thiophenes were compatible with the reaction conditions. Authors’ approach offers a simple route to useful substituted thiazol-5-amines from com. available nitroarenes.

Synlett published new progress about Benzothiazoles Role: SPN (Synthetic Preparation), PREP (Preparation). 104-01-8 belongs to class isoquinoline, name is 4-Methoxyphenylacetic acid, and the molecular formula is C9H10O3, Category: isoquinoline.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Li, Yigao published the artcileFe(III)-Catalyzed N-Amidomethylation of Secondary and Primary Anilines with TosMIC, Recommanded Product: 4-Methoxy-N-methylaniline, the main research area is alpha amino amide preparation; isocyanide aniline amidomethylation multicomponent iron catalyst.

A Fe(III)-catalyzed N-amidomethylation of secondary and primary anilines with p-toluenesulfonylmethyl isocyanide (TosMIC) in water was described. TosMIC played dual roles as the source of methylene as well as an amidating reagent to form α-amino amides R1N(R2)CH2C(O)NHR3 [R1 = Ph, 2-MeC6H4, 4-FC6H4, etc.; R2 = H, Me, Bn, etc.; R3 = t-Bu, 4-MeC6H4SO2CH2, 4-ClC6H4SO2CH2] in this multicomponent reaction. The combination of TosMIC and other isocyanides was also investigated to give the desired products in acceptable yields. The current protocol features used of iron catalyst and nontoxic media, broad substrate scope, mild conditions and operational simplicity.

Organic Letters published new progress about Anilines Role: RCT (Reactant), RACT (Reactant or Reagent). 5961-59-1 belongs to class isoquinoline, name is 4-Methoxy-N-methylaniline, and the molecular formula is C8H11NO, Recommanded Product: 4-Methoxy-N-methylaniline.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Howard, Philip H. published the artcileIdentifying New Persistent and Bioaccumulative Organics Among Chemicals in Commerce, SDS of cas: 117-96-4, the main research area is identifying new persistent bioaccumulative organic chem.

This work identified com. chems. which may be persistent and bioaccumulative (P&B) and are not being considered in current Great Lakes, North American, and Arctic pollutant measurement programs. The authors combined the Canadian Domestic Substance List (DSL; a list of 3059 substances of unknown or variable composition complex reaction products and biol. materials) and the USEPA Toxic Substances Control Act Inventory Update Rule database for years 1986, 1990, 1994, 1998, 2002, and 2006, yielding a database of 22,263 com. chems. From that list, 610 chems. were identified by estimates from USEPA EPISuite software and using expert judgment. This work yielded some interesting, probable P&B chems. which should be considered for addnl. study. Recent studies, following initial reports and presentations on this work, confirmed the environmental presence of many of these chems.

Environmental Science & Technology published new progress about Alcohols, C8-14, γ-ω-perfluoro Role: NUU (Other Use, Unclassified), POL (Pollutant), PRP (Properties), USES (Uses), OCCU (Occurrence). 117-96-4 belongs to class isoquinoline, name is Diatrizoic Acid, and the molecular formula is C11H9I3N2O4, SDS of cas: 117-96-4.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Shen, Feng published the artcileTransition-Metal-Free ipso-Trifluoromethylthiolation of Lithium Aryl Boronates, HPLC of Formula: 151-10-0, the main research area is lithium aryl boronate ipso trifluoromethylthiolation.

A transition-metal-free direct trifluoromethylthiolation of the ipso-carbon of lithium aryl boronates with trifluoromethanesulfenate under mild conditions was described. In addition, late-stage site-selective C-H borylation/trifluoromethylation and C-Cl borylation/trifluoromethylthiolation of biol. active mols. was developed. Initial mechanistic study suggested that the Li+ cation plays a vital role by coordinating to the oxygen atom of an aryl boronate complex and the oxygen of the reagent, thus allowing the aryl group to directly attack the trifluoromethylthio group of the trifluoromethylthiolating reagent.

Organic Letters published new progress about Borylation. 151-10-0 belongs to class isoquinoline, name is 1,3-Dimethoxybenzene, and the molecular formula is C8H10O2, HPLC of Formula: 151-10-0.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Borges, Igor D. published the artcileSynthesis and molecular modeling study of two bromo-dimethoxybenzaldehydes, Application of 2,3-Dimethoxybenzaldehyde, the main research area is bromo dimethoxybenzaldehyde preparation mol modeling.

This work describes the synthesis, mol. structure, and packaging of the compounds 6-bromo-2,3-dimethoxybenzaldehyde (6-BRB) and 5-bromo-2,3-dimethoxybenzaldehyde (5 BRB). Characterization in the solid-state was carried out by X-ray diffraction, and the anal. of the interactions was described by the Hirshfeld surface, which helps in understanding the effect of replacing the bromine position in the aromatic ring. Both compounds (6-BRB and 5-BRB) crystallized in the space group P21/c and are stabilized with C-HO interactions, but only the 6-BRB has a halogen-type interaction. Theor. calculations, carried out by the d. functional theory at the CAM-B3LYP/6-311++G(d,p) level of theory in gas phase, provided information on their electronic properties. The geometric properties were compared to exptl. data, and the analyses of the frontier MOs and the mol. electrostatic potential (MEP) maps were obtained to predict the phys.-chem. properties. The supramol. arrangements were analyzed throughout complexation interactions and corrected by counterpoise method. Hyperconjugation energies were employed to examine the stability of the intermol. interactions of the compounds The interaction intensities were determined through the topol. parameters obtained through the quantum theory of atoms in mols. model.

Journal of the Brazilian Chemical Society published new progress about Bond angle. 86-51-1 belongs to class isoquinoline, name is 2,3-Dimethoxybenzaldehyde, and the molecular formula is C9H10O3, Application of 2,3-Dimethoxybenzaldehyde.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Zhao, Huaibo published the artcileMinimization of Back-Electron Transfer Enables the Elusive sp3 C-H Functionalization of Secondary Anilines, Computed Properties of 5961-59-1, the main research area is arylamine arylpyrrolidinone aminobenzonitrile chemoselective photochem preparation; iridium cobalt photoredox catalyst dealkylation addition arylation base mediated; inhibition back electron transfer photochem dealkylation addition alkylarylamine; C−H functionalization; anilines; electron transfer; late-stage modification; photoredox catalysis.

Anilines are some of the most used class of substrates for application in photoinduced electron transfer. N,N-Dialkyl-derivatives enable radical generation α to the N-atom by oxidation followed by deprotonation. This approach is however elusive to monosubstituted anilines owing to fast back-electron transfer (BET). Here we demonstrate that BET can be minimised by using photoredox catalysis in the presence of an exogenous alkylamine. This approach synergistically aids aniline SET oxidation and then accelerates the following deprotonation. In this way, the generation of α-anilinoalkyl radicals is now possible and these species can be used in a general sense to achieve divergent sp3 C-H functionalization.

Angewandte Chemie, International Edition published new progress about Arylation catalysts (photochem.). 5961-59-1 belongs to class isoquinoline, name is 4-Methoxy-N-methylaniline, and the molecular formula is C8H11NO, Computed Properties of 5961-59-1.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Gaykar, Rahul N. published the artcileTransition-Metal-Free Thioamination of Arynes Using Sulfenamides, HPLC of Formula: 5961-59-1, the main research area is sulfanylaniline preparation thioamination aryne sulfenamide; transition metal free insertion aryne vortioxetine preparation.

The insertion of arynes into the S-N σ-bond of sulfenamides allowing the synthesis of o-sulfanylaniline derivatives with reasonable functional group compatibility is presented. The aryne generated from 2-(trimethylsilyl)aryl triflates using CsF in DME was the key for the success of this transition-metal-free thioamination reaction, which involves new C-N and C-S bond formations in a single step under mild conditions. Moreover, the synthetic potential of this method was demonstrated by the synthesis of the antidepressant drug vortioxetine.

Organic Letters published new progress about Amination (thio-). 5961-59-1 belongs to class isoquinoline, name is 4-Methoxy-N-methylaniline, and the molecular formula is C8H11NO, HPLC of Formula: 5961-59-1.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Wu, Wen-Biao published the artcileConstructing tertiary alcohols with vicinal stereocenters: highly diastereo- and enantioselective cyanosilylation of α-branched acyclic ketones and their kinetic resolution, Name: 4-Methoxyphenylacetic acid, the main research area is tertiary alc preparation diastereoselective enantioselective; alpha branched acyclic ketone cyanosilylation.

Highly diastereo- and enantioselective C-C bond-forming reaction of racemic α-branched ketones to construct tertiary alcs. with adjacent stereocenters was reported. Accordingly, a highly stereoselective cyanosilylation of racemic ketones was developed using bifunctional cyanating reagent, Me2(CH2Cl)SiCN, giving Cα-tetrasubstituted silyl cyanohydrins with two vicinal stereocenters in up to >20:1 diastereomeric ratio (dr) and 90-98% enantiomeric excess (ee) values, which could underwent various diversification reactions by manipulating the chloromethyl group. A highly selective kinetic resolution of acyclic α-branched ketones was also developed that allowed facile access to acyclic α-alkyl, allyl, and propargyl ketones with good recovery and excellent ee values. The synthetic value of this protocol was further demonstrated by the formal synthesis of the anti-obesity agent, taranabant (MK-0364). The activation of Jacobsen’s privileged catalyst (salen)AlCl by a suitable phosphorane played a crucial role in the reaction. X-Ray crystallog. anal. of single crystals of phosphorane-(salen)AlCl complexes and theor. calculations helped to provide a working model. The present transformation opened a new path for the catalytic stereoselective synthesis of stereochem. complex tertiary alcs. featuring two stereocenters (adjacent or not) from racemic ketones.

CCS Chemistry published new progress about Carboxylic acids Role: RCT (Reactant), RACT (Reactant or Reagent). 104-01-8 belongs to class isoquinoline, name is 4-Methoxyphenylacetic acid, and the molecular formula is C9H10O3, Name: 4-Methoxyphenylacetic acid.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Nishimura, Rodolfo H. V. published the artcileSelective Functionalization of Benzo-Fused N-Heterocycles by Using In Situ Trapping Metalations, Category: isoquinoline, the main research area is benzo fused heterocycle preparation regioselective.

Some benzo-fused N-heterocycles, e.g., I were prepared by regioselective metalation of quinoline, isoquinoline, quinoxaline and quinazoline with LiTMP in the presence of zinc chloride. Applying this strategy to synthesize an analog of the antitumor verubulin illustrated its relevance for medicinal chem. Computational calculations of the pKa values of the aromatic hydrogens helped to rationalize substrate reactivity and metalation regioselectivity by the complex-induced proximity effect concept.

ChemistrySelect published new progress about Metalation. 5961-59-1 belongs to class isoquinoline, name is 4-Methoxy-N-methylaniline, and the molecular formula is C8H11NO, Category: isoquinoline.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem