Day: November 11, 2022

Xie, Shuguang published the artcileChelation-directed remote meta-C-H functionalization of aromatic aldehydes and ketones, Category: isoquinoline, the main research area is olefin aromatic carbonyl compound palladium catalyst regioselective tandem olefination.

The development of a versatile 1,2-diol directing template for palladium-catalyzed remote meta-C-H functionalization of aromatic aldehydes and ketones was disclosed. In situ-generation of acetals and ketals, as well as removal afterwards, made the C-H bond functionalization processed more straightforward and efficient. This also represented the first example of chelation-directed meta-C-H functionalization of aromatic aldehydes and ketones.

Chemical Communications (Cambridge, United Kingdom) published new progress about Alkenylation catalysts, stereoselective (regioselective). 86-51-1 belongs to class isoquinoline, name is 2,3-Dimethoxybenzaldehyde, and the molecular formula is C9H10O3, Category: isoquinoline.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Grajewska, Agnieszka published the artcileSynthesis of new substituted 7,12-dihydro-6,12-methanodibenzo[c,f]azocine-5-carboxylic acids containing a tetracyclic tetrahydroisoquinoline core structure, COA of Formula: C9H10O3, the main research area is dihydromethanodibenzoazocine carboxylic acid preparation; aminoacetaldehyde acetal Petasis reaction Pomeranz Fritsch double cyclization; amino acids; cyclization; multicomponent reactions; synthetic methods; tetrahydroisoquinoline.

A convenient and simple protocol has been developed for the synthesis of a series of new tetracyclic tetrahydroisoquinoline derivatives, 7,12-dihydro-6,12-methanodibenzo[c,f]-azocine-5-carboxylic acids by three component Petasis reaction with the use of aminoacetaldehyde acetals bearing substituted benzyl groups as the amine components followed by Pomeranz-Fritsch double cyclization reaction. By applying this method, several acids have been prepared in satisfactory yields. An unprecedented chem. behavior of a Petasis reaction product in diluted HCl solution leading to the formation of a phenylglycine derivative has been observed and the mechanism explaining such reactivity has been proposed.

Beilstein Journal of Organic Chemistry published new progress about Aldehydes Role: RCT (Reactant), RACT (Reactant or Reagent). 86-51-1 belongs to class isoquinoline, name is 2,3-Dimethoxybenzaldehyde, and the molecular formula is C9H10O3, COA of Formula: C9H10O3.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Krieg, Reimar published the artcileFirst Synthesis of Highly Chemiluminescent Benzo[b]furan-2(3H)-ones Bearing a Urea Substructure, Synthetic Route of 598-50-5, the main research area is chemiluminescent dialkylaminocarbonylaminobenzofuranone preparation fluorescence.

A series of benzo[b]furan-2(3H)-ones (coumaran-2-ones) bearing a urea substructure, namely derivatives of 3-(aminocarbonylamino)benzo[b]furan-2(3H)-one, was prepared for the first time. The accessibility of these compounds through an electrophilic α-amidoalkylation approach of phenols (Tscherniac-Einhorn reaction) in the key step as well as the chemiluminescence (CL) properties of the desired compounds are strongly dependent on the substitution patterns at the urea moiety. Competing reaction pathways are discussed and an improved one pot synthetical approach of also general interest is presented. In conclusion, especially N,N-dialkylaminocarbonylamino-derivatives of benzo[b]furan-2(3H)-ones exhibit a strong flash like blue CL upon treatment with bases such as 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU) in the presence of oxygen or hydrogen peroxide. Comparative physico-chem. investigations revealed that novel compounds outperform their urethane-analogs in terms of CL-intensity and the speed of the decay making them potentially useful as new tools for CL-based applications on the short time scale.

Helvetica Chimica Acta published new progress about Chemiluminescence. 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

Hirose, Yuuka published the artcileAromatic Halogenation Using N-Halosuccinimide and PhSSiMe3 or PhSSPh, Name: 1,3-Dimethoxybenzene, the main research area is arene aromatic halogenation halosuccinimide; haloarene preparation aromatic halogenation halosuccinimide.

We developed a mild aromatic halogenation reaction using a combination of N-halosuccinimide and PhSSiMe3 or PhSSPh. Less reactive aromatic compounds, such as Me 4-methoxybenzoate, were brominated with PhSSiMe3 or PhSSPh and N-bromosuccinimide in high yields. No reaction was observed in the absence of PhSSiMe3 or PhSSPh. This method is also applicable to chlorination reactions using N-chlorosuccinimide and PhSSPh.

Journal of Organic Chemistry published new progress about Aryl bromides Role: SPN (Synthetic Preparation), PREP (Preparation). 151-10-0 belongs to class isoquinoline, name is 1,3-Dimethoxybenzene, and the molecular formula is C8H10O2, Name: 1,3-Dimethoxybenzene.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Shinohara, Koichi published the artcileN-Methylation of Aniline Derivatives with CO2 and Phenylsilane Catalyzed by Lanthanum Hydridotriarylborate Complexes bearing a Nitrogen Tridentate Ligand, Name: 4-Methoxy-N-methylaniline, the main research area is methyl aniline preparation; aniline methylation phenylsilane lanthanum hydridotriarylborate complex nitrogen tridentate ligand; lanthanum hydridotriarylborate complex nitrogen tridentate ligand preparation.

A lanthanum amide complex, La(L)[N(SiHMe2)2](thf) (L = N,N””-bis(pentafluorophenyl)diethylenetriamine dianion), upon activation with B(3,4,5-F2C6H2)3, showed excellent catalytic activity for N-methylation of N-alkylaniline derivatives with CO2 in the presence of PhSiH3. A catalytically active lanthanum hydridotriarylborate complex, [La(L)(thf)2][HB(3,4,5-F3C6H2)3], was generated via hydride abstraction from the Si-H moiety by moderate Lewis acid B(3,4,5-F2C6H2)3 in THF. DFT studies of the CO2 hydrosilylation step clarified the following multiple noncovalent interactions as key factors for locating the HB(3,4,5-F2C6H2)3 anion and B(3,4,5-F3C6H2)3 near the lanthanum center in the transition states of CO2 reduction and Si-O bond formation: (1) π-π interaction between the electron-deficient C6F5 ring on ligand L and the 3,4,5-F3C6H2 ring of the HB(3,4,5-F3C6H2)3 anion and (2) C-H···F hydrogen bonds between the ortho-C-H bond of B(3,4,5-F3C6H2)3 and the fluorine atoms of L.

ACS Catalysis published new progress about Free energy. 5961-59-1 belongs to class isoquinoline, name is 4-Methoxy-N-methylaniline, and the molecular formula is C8H11NO, Name: 4-Methoxy-N-methylaniline.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Liu, Yuxia published the artcileHighly Efficient Binuclear Copper-catalyzed Oxidation of N,N-Dimethylanilines with O2, Application In Synthesis of 5961-59-1, the main research area is phenylformamide methyl aniline green preparation; dimethylaniline oxidation binuclear copper catalyst.

A binuclear copper-salicylate complex, [Cu(Sal)2(NCMe)]2 (Sal=salicylate), was found to be an active catalyst for the oxidation of N,N-dimethylanilines by O2, affording the corresponding N-methyl-N-phenylformamides RC6H4N(Me)CHO [R = 4-Br, 3,4-di-F, 3-Cl-4-Me, etc.] as major products and N-methyl-phenylamines RC6H4NHMe as minor products. The reactions were carried out with a O2 balloon and the S/C (substrate/catalyst ratio) of the model reaction could be up to 1×105 providing a practical and highly efficient catalytic protocol for accessing N-methyl-N-phenylformamides.

ChemCatChem published new progress about Formamides Role: SPN (Synthetic Preparation), PREP (Preparation) (Ph). 5961-59-1 belongs to class isoquinoline, name is 4-Methoxy-N-methylaniline, and the molecular formula is C8H11NO, Application In Synthesis of 5961-59-1.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Nobile, Enzo published the artcileC-H Electrophilic (phenylsulfonyl)difluoromethylation of (hetero)arenes with a newly designed reagent, Computed Properties of 151-10-0, the main research area is aniline heteroarene electrophilic phenylsulfonyl difluoromethylation benzenesulfonyl difluoromethyldibenzothiophenium triflate.

The synthesis of an original electrophilic difluoromethylating reagent was successfully achieved upon a straightforward protocol (3 steps). Like a Swiss army knife, this bench-stable reagent allowed the functionalization of various classes of compounds under mild and transition metal-free conditions. Hence, an efficient and operationally simple tool for the construction of C(sp2)-, C(sp3)- and S-CF2SO2Ph bonds was provided, expanding the chem. space of PhSO2CF2-containing mols. Late-stage functionalization of bioactive mols. and the synthesis of PhSO2CF2- and HCF2-analogs of Lidocaine were also successfully achieved.

Chemical Communications (Cambridge, United Kingdom) published new progress about Difluoromethylation (phenylsulfonyl). 151-10-0 belongs to class isoquinoline, name is 1,3-Dimethoxybenzene, and the molecular formula is C8H10O2, Computed Properties of 151-10-0.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Ren, Shuang published the artcileIron porphyrin-catalyzed N-trifluoroethylation of anilines with 2,2,2-trifluoroethylamine hydrochloride in aqueous solution, Name: 4-Methoxy-N-methylaniline, the main research area is trifluoroethylated amine preparation; aniline trifluoroethylamine hydrochloride tandem diazotization trifluoroethylation iron porphyrin catalyst.

Preparation of trifluoroethylated amines ArN(R)CH2CF3 [Ar = Ph, 3-MeC6H4, 4-MeOC6H4, etc.; R = H, Me] via iron porphyrin-catalyzed N-trifluoroethylation of anilines was developed with 2,2,2-trifluoroethylamine hydrochloride as the fluorine source. This one-pot N-H insertion reaction was conducted via cascade diazotization/N-trifluoroethylation reactions. The developed transformation can afford a wide range of N-trifluoroethylated anilines in good yields using readily available primary amines and secondary anilines as starting materials.

RSC Advances published new progress about Diazotization. 5961-59-1 belongs to class isoquinoline, name is 4-Methoxy-N-methylaniline, and the molecular formula is C8H11NO, Name: 4-Methoxy-N-methylaniline.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Ren, Jiangmeng published the artcileStudies towards DIAD promoted N-demethylation of N,N-dimethylanilines, Synthetic Route of 5961-59-1, the main research area is methylaniline preparation; dimethylaniline demethylation diisopropyl azodicarboxylate.

The demethylation of N,N-dimethylanilines promoted by diisopropyl azodicarboxylate (DIAD) to provide N-methylanilines was achieved in this paper. This protocol featured with mild reaction condition, simple operation and moderate to good yield. The intermediates were isolated and identified by means of spectroscopy methods. The reaction mechanism was investigated exptl. and further verified by theor. calculations This method could be applied to the study of the metabolites of medicines containing N,N-dimethylaniline fragments.

Tetrahedron Letters published new progress about Demethylation. 5961-59-1 belongs to class isoquinoline, name is 4-Methoxy-N-methylaniline, and the molecular formula is C8H11NO, Synthetic Route of 5961-59-1.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Zhou, Chao-Zheng published the artcileUtilization of renewable formic acid from lignocellulosic biomass for the selective hydrogenation and/or N-methylation, Related Products of isoquinoline, the main research area is tetrahydroquinoline preparation; quinoline formic acid hydrogenation; formic acid quinoline methylation; indoline preparation; indole formic acid methylation; dimethyl aniline preparation; aniline formic acid methylation.

Herein, the utilization of renewable formic acid from lignocellulosic biomass as a hydrogen source and a carbon source for the selective hydrogenation and further N-methylation of various quinolines and the derivatives I (Y = CH, N; R = H, 6-Br, 2,3-(Me)2, 6-Cl, etc.), 1,10-phenanthroline, 2,9-dimethyl-1,10-phenanthroline and 2,7-dimethyl-pyrido[2,3-g]quinoline, various indoles II (R1 = 2-Me, 5-Br, 6-F, etc.) under mild conditions in high efficiencies were developed. N-methylation of various anilines R2C6H4NHCH3 (R2 = H, 2-Cl, 3-Me, 4-OMe, etc.) and R2C6H4NH2 is also developed. Mechanistic studies indicate that the hydrogenation occurs via a transfer hydrogenation pathway.

ChemCatChem published new progress about Biomass. 5961-59-1 belongs to class isoquinoline, name is 4-Methoxy-N-methylaniline, and the molecular formula is C8H11NO, Related Products of isoquinoline.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem