Month: November 2022

Yadykov, Anton V. published the artcileCyclization of Polarized Divinyl Ketones under Aqueous and Ambient Conditions, Recommanded Product: 4-Methoxyphenylacetic acid, the main research area is combretastatin A4 analog preparation Nazarov cyclization polarized divinyl ketone.

An ‘on-water’ protocol has been developed for the synthesis of combretastatin A-4 (CA-4) analogs by cyclization of polarized triaryldivinyl ketones using hydrochloric acid as a promoter in 45-95% yields. The reaction time was reduced by about 30 times due to ultrasonic irradiation at ambient temperature The other advantages of this new method are operational simplicity, easy workup, no column purification, and applicability on a gram-scale. It was shown that the amphiphilicity of the substrate and a low energy barrier of the reaction are a prerequisite for electrophilic and concerted reactions under aqueous and ambient conditions.

Advanced Synthesis & Catalysis published new progress about Combretastatins Role: SPN (Synthetic Preparation), PREP (Preparation). 104-01-8 belongs to class isoquinoline, name is 4-Methoxyphenylacetic acid, and the molecular formula is C9H10O3, Recommanded Product: 4-Methoxyphenylacetic acid.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Kumar, Devarapalli Ravi published the artcileCopper-Catalyzed Chemoselective 1,4-Reductions: Sequential One-Pot Synthesis of Esters, Formula: C9H10O3, the main research area is cabonyl ester preparation chemoselective; carbonyl compound triethyl phosphonoacetate reduction copper catalyst; indanone preparation chemoselective; triethyl phosphonoacetate carbonyl compound cyclization copper catalyst.

A sequential one-pot Horner-Wadsworth-Emmons reaction followed by [Cu]-catalyzed 1,4-reduction for an efficient preparation of esters (R1)(R2)CHCH2C(O)OC2H5 (R1 = H, Me; R2 = Ph, naphthalen-1-yl, thiophen-2-yl, 2H-1,3-benzodioxol-5-yl, 4-chlorophenyl, etc.; R1R2 = -(CH2)4-, -(CH2)5-, -(CH2)6-) is described. The protocol showed excellent chemoselectivity and broad functional group tolerance. In addition, the strategy was successfully applied for the synthesis of indanones I (R3 = 4-Me, 5-iso-Pr, 7-methoxy, 5-methoxy; R4 = H, Me) by using a single column chromatog. process.

ChemistrySelect published new progress about Aromatic esters Role: SPN (Synthetic Preparation), PREP (Preparation). 86-51-1 belongs to class isoquinoline, name is 2,3-Dimethoxybenzaldehyde, and the molecular formula is C9H10O3, Formula: C9H10O3.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Pandey, Vipin K. published the artcileSimple silver(I)-salt catalyzed selective hydroboration of isocyanates, pyridines, and quinolines, SDS of cas: 5961-59-1, the main research area is hydroboration isocyanate pyridine quinoline preparation formamide amine dihydropyridine tetrahydroquinoline; silver hexafluoroantimonate catalyst hydroboration reduction isocyanate pyridine quinoline.

AgSbF6 has been established as an effective catalyst for the hydroboration of structurally and electronically diverse isocyanates under ligand- and solvent-free conditions which selectively yielded either N-boryl formamides or N-boryl methylamines under different conditions. Further, various N-heterocycles can be selectively hydroborated using this simple catalytic system; pyridine derivatives undergo preferential 1,4 hydroboration whereas the formation of tetrahydroquinoline (after hydrolysis) via complete heterocycle hydrogenation was observed for quinolines.

Chemical Communications (Cambridge, United Kingdom) published new progress about Aromatic amines Role: SPN (Synthetic Preparation), PREP (Preparation). 5961-59-1 belongs to class isoquinoline, name is 4-Methoxy-N-methylaniline, and the molecular formula is C8H11NO, SDS of cas: 5961-59-1.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Pradhan, Suman published the artcileRegiodivergent Aromatic Electrophilic Substitution Using Nitrosoarenes in Hexafluoroisopropanol: A Gateway for Diarylamines and p-Iminoquinones Synthesis, Application of 1,3-Dimethoxybenzene, the main research area is diaryl amine iminoquinone regiodivergent preparation; arene nitrosoarene regiodivergent aromatic electrophilic substitution.

A metal-free aromatic electrophilic substitution reaction using nitrosoarenes as electrophiles in 1,1,1,3,3,3-hexafluoroisopropanol (HFIP) was reported. HFIP activates nitrosoarene toward the electrophilic C-H amination followed by a concomitant N-O bond cleavage to deliver diarylamines, e.g. I (R1 = H, Cl, I, CF3, R2 = H; R1 = H, R2 = Br, Me, EtO2C) from 1,3,5-trimethoxybenzene, without requiring any extra reagent or further treatment. The dual electrophilic nature of nitrosoarene permitted a switch-over of selectivity to C-H oxygenation furnishing dearomatized p-iminoquinones, such as II, following a unique mechanistic rationale of two consecutive [2,3] sigmatropic rearrangement in nitroso-chem.

Advanced Synthesis & Catalysis published new progress about Aromatic amines Role: SPN (Synthetic Preparation), PREP (Preparation). 151-10-0 belongs to class isoquinoline, name is 1,3-Dimethoxybenzene, and the molecular formula is C8H10O2, Application of 1,3-Dimethoxybenzene.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Guan, Renpeng published the artcileDecarboxylative oxygenation of carboxylic acids with O2via a non-heme manganese catalyst, Category: isoquinoline, the main research area is manganese photocatalyst preparation; aryl carboxylic acid manganese photocatalyst oxygenation; arylaldehyde preparation; arylketone preparation.

Decarboxylative oxygenation of carboxylic acids using a non-heme manganese catalyst under blue light irradiation with O2 as the sole oxidant. Featuring mild reaction conditions, the protocol allowed readily available carboxylic acids to be converted into a wide variety of valuable aldehydes, ketones and amides. Mechanistic studies indicated that the decarboxylation and oxygenation involved the formation of active Mn-oxygen species.

Green Chemistry published new progress about Aromatic amides 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

Jud, Wolfgang published the artcileElectrochemical α-Arylation of Ketones via Anodic Oxidation of in situ Generated Silyl Enol Ethers, Name: 1,3-Dimethoxybenzene, the main research area is aryl ketone electrochem arylation arene; aralkyl ketone preparation.

An electrochem. procedure for the α-arylation of ketones has been developed. The method is based on the generation and one-pot anodic oxidation of silyl enol ethers in the presence of an arene. This strategy avoids isolation of the silyl enol intermediate and the utilization of external supporting electrolytes. Intermol. arylations, which had not been reported so far, are possible when electron-rich arenes are utilized as coupling partners. The method has been demonstrated for a wide variety of aryl ketones and activated arenes in moderate to good yields (up to 69%). Mechanistic insights and a theor. rationale that explained the ketone α-arylation vs. dimerization selectivity are also presented.

Journal of Organic Chemistry published new progress about Aralkyl ketones 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

Huang, Shuang published the artcileBimetallic Bis-NHC-Ir(III) Complex Bearing 2-Arylbenzo[d]oxazolyl Ligand: Synthesis, Catalysis, and Bimetallic Effects, COA of Formula: C8H11NO, the main research area is potential energy surface iridacycle complex catalyzed methylation aniline DFT; bimetallic biscarbene iridium complex containing arylbenzooxazolyl ligand preparation catalyst; crystal structure bimetallic biscarbene iridium complex containing arylbenzooxazolyl ligand; mol structure bimetallic biscarbene iridium complex containing arylbenzooxazolyl ligand; isotope effect iridium carbene complex catalyzed methylation aniline.

Herein, an unprecedented bimetallic bis-NHC Cp*Ir complex 1 bearing 2-arylbenzo[d]oxazolyl and NHC ligands is reported. A significantly increase in activity was observed for N-methylation of amines and reduction of aldehydes with MeOH catalyzed by 1 compared to the monometallic analogs (2-11). Under the optimal conditions, it showed to be highly effective in N-methylation of nitroarenes with MeOH as both C1 and H2 source. Substrates, including aromatic amines, ketones and nitro compounds with various functional groups, can be well tolerated. Mechanistic studies and DFT calculation highlights the significance of bimetallic centers cooperativity.

Organometallics published new progress about Anilines Role: SPN (Synthetic Preparation), PREP (Preparation) (N-Me). 5961-59-1 belongs to class isoquinoline, name is 4-Methoxy-N-methylaniline, and the molecular formula is C8H11NO, COA of Formula: C8H11NO.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Chen, Qinghua published the artcileAccess to Phenothiazine Derivatives via Iodide-Mediated Oxidative Three-Component Annulation Reaction, Related Products of isoquinoline, the main research area is phenothiazine preparation iodide annulation aniline cyclohexanone sulfur.

Herein, a new iodide-mediated three-component annulation reaction of secondary anilines, cyclohexanones, and elemental sulfur is demonstrated, which allows access to various phenothiazines with the merits of formation of multiple chem. bonds in one single operation, high step and atom efficiency, readily available feedstocks and catalyst system, and good substrate and functional group compatibility. The developed chem. capable of constructing novel phenothiazines with structural diversity offers a significant basis for further applications.

Journal of Organic Chemistry published new progress about Anilines Role: RCT (Reactant), RACT (Reactant or Reagent) (secondary). 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

Tao, Lei published the artcileSynthesis of Carboxylic Acids, Esters, and Amides from 1,1-Dibromoalkenes via Oxidation of Alkynyl Boronate Intermediates, Synthetic Route of 104-01-8, the main research area is carboxylic acid preparation; dibromoalkene oxone Corey Fuchs reaction oxidation; ester preparation; alc oxone dibromoalkene Corey Fuchs reaction oxidation; amide preparation; amine oxone dibromoalkene Corey Fuchs reaction oxidation.

An efficient and practical method for the synthesis of carboxylic acids RCH2COOH (R = cyclohexyl, biphenyl-4-yl, thiophen-2-yl, etc.), esters RCH2C(O)OR1 (R1 = Me, Bn, cyclopropylmethyl, etc.), and amides RCH2C(O)NR2R3 [R2 = H, Et, i-Pr, Cy, Bn; R3 = n-Bu, cycloproyl, t-Bu, Et, i-Pr, Cy, Bn; R2R3 = -(CH2)2O(CH2)2-] from 1,1-dibromoalkenes RCH=CBr2Me has been developed. The reactions proceed through a key process, the C(sp)-B bond oxidation of alkynyl boronate intermediates with Oxone. This protocol features broad substrate scope, good efficiency, and good functional group compatibility. Moreover, the synthetic practicability was demonstrated by easy gram-scale preparation and the synthesis of drug mols., e.g., diclofenac.

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

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Du, Xiaoyong published the artcileEnantioselective Hydrogenation of Tetrasubstituted α,β-Unsaturated Carboxylic Acids Enabled by Cobalt(II) Catalysis: Scope and Mechanistic Insights, Computed Properties of 104-01-8, the main research area is arylcycloalkanecarboxylate diastereoselective enantioselective preparation; isopropylarylacetate enantioselective preparation; cobalt catalyst stereoselective hydrogenation tetrasubstituted unsaturated carboxylic acid; transition state structure free energy enantioselective hydrogenation alkenoic acid; DFT calculations; cobalt; mechanisms; tetrasubstituted unsaturated carboxylic acids.

Chiral carboxylic acids are important compounds because of their prevalence in pharmaceuticals, natural products and agrochems. Asym. hydrogenation of α,β-unsaturated carboxylic acids has been widely recognized as one of the most efficient synthetic approaches to afford such compounds Although related asym. hydrogenation of di- and trisubstituted unsaturated acids with noble metals is well established, asym. hydrogenation of challenging tetrasubstituted α,β-unsaturated carboxylic acids is rarely reported. We demonstrate enantioselective hydrogenation of cyclic (2-aryl-1-cycloalkene-1-carboxylic acids) and acyclic (α-isopropylidenearylacetic acids) tetrasubstituted α,β-unsaturated carboxylic acids via cobalt(II) catalysis. This protocol showed broad substrate scope and gave chiral carboxylic acids in good yields with excellent enantiocontrol (up to 98% yield and 99% ee). Combined exptl. and computational mechanistic studies support a CoII catalytic cycle involving migratory insertion and σ-bond metathesis processes. DFT calculations reveal that enantioselectivity may originate from the steric effect between the Ph groups of the ligand and the substrate.

Angewandte Chemie, International Edition published new progress about Carboxylic acids Role: SPN (Synthetic Preparation), PREP (Preparation). 104-01-8 belongs to class isoquinoline, name is 4-Methoxyphenylacetic acid, and the molecular formula is C9H10O3, Computed Properties of 104-01-8.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem