Category: isoquinoline

Buckley, Aoife M. published the artcileDirhodium Carboxylate Catalysts from 2-Fenchyloxy or 2-Menthyloxy Arylacetic Acids: Enantioselective C-H Insertion, Aromatic Addition and Oxonium Ylide Formation/Rearrangement, Synthetic Route of 104-01-8, the main research area is dirhodium carboxylate preparation; arylacetic acid diazocarbonyl compound addition reaction; tetrahydrothiopyran preparation enantioselective diastereoselective; diazooxosulfone carbon hydrogen insertion rhodium catalyst; Aromatic Addition; Carbenoids; C−H Insertion; Diazo Compounds; Rhodium Catalysis.

A new class of dirhodium carboxylate catalysts I (Ar = Ph, naphthalen-2-yl, 4-bromophenyl, etc.; R = 1,3,3-trimethylbicyclo[2.2.1]heptan-2-yl, menthyl) have been designed and synthesized from 2-fenchyloxy or 2-menthyloxy arylacetic acids ArC(OR)COOH which display excellent enantioselectivity across a range of transformations of α-diazocarbonyl compds ArC(=N2)C(O)Ot-Bu. The catalysts were successfully applied to enantioselective C-H insertion reactions of aryldiazoacetates and α-diazo-β-oxosulfones R1(CH2)4S(O)OC(=N2)C(O)R2 (R1 = Ph, octyl, 4-fluorophenyl, etc.; R2 = Me, Bn, Ph) and Me 2-((cyclohexylethyl)sulfonyl)-2-diazoacetate affording the resp. products II and Me (1R,4aS,8aR)-octahydro-1H-isothiochromene-1-carboxylate 2,2-dioxide in up to 93% ee with excellent trans diastereoselectivity in most cases. Furthermore, efficient desymmetrization in an intramol. C-H insertion was achieved. In addition, these catalysts prove highly enantioselective for intramol. aromatic addition with up to 88% ee, and Me 2-diazo-3-(2-allyloxyphenyl)-3-oxopropionate formation and rearrangement with up to 74% ee.

ChemCatChem published new progress about Diastereoselective synthesis. 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

Feng, Guidong published the artcileCross-dehydrogenative coupling of 3,6-dihydro-2H-pyrans with 1,3-dicarbonyls and aryl moieties, Safety of 1,3-Dimethoxybenzene, the main research area is dicarbonyl compound dihydropyran indium catalyst regioselective oxidative alkylation; arene dihydropyran indium catalyst regioselective oxidative arylation.

An indium-catalyzed oxidative C-H alkylation and arylation of 4-substituted 3,6-dihydro-2H-pyrans (DHPs) using dichloro-5,6-dicyano-1,4-benzoquinone (DDQ) as the oxidant was developed. The mild and modular cross-dehydrogenative coupling reaction exhibited a broad scope with respect to both DHPs and nucleophilic 1,3-dicarbonyl moieties as well as aryl rings rapidly providing 2,4-disubstituted DHPs bearing diverse patterns of functionalization at the α-position.

Tetrahedron Letters published new progress about Alkylation catalysts, regioselective. 151-10-0 belongs to class isoquinoline, name is 1,3-Dimethoxybenzene, and the molecular formula is C8H10O2, Safety of 1,3-Dimethoxybenzene.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Zhang, Zhiguo published the artcileStraightforward synthesis of biologically valuable nonsymmetrical malonamides under mild conditions, Name: 4-Methoxy-N-methylaniline, the main research area is nonsym malonamide regioselective preparation; isocyanate ketoamide nucleophilic addition deacetylation sequence.

A flexible and atom-economical method was developed for efficient preparation of nonsym. malonamides RNHCOCH2CONR1R2 [R = Et, cyclohexyl, Bn, etc.; R1 = Me, Ph, Bn, etc.; R2 = H, Me] from com. or readily available isocyanates and β-ketoamides. These substrates delivered a series of nonsym. malonamides in good to excellent yields via a MgCl2-mediated nucleophilic addition/deacetylation sequence in the presence of a base in an alc. solvent. Salient merits of this chem. include step-economy, ease of work-up, mild conditions, broad substrate scope, functional group tolerance and scalability. The high efficiency and practicability enabled rapid access to diverse precursors of malonamides for use in pharmaceuticals.

Green Chemistry published new progress about Amides, oxo Role: RCT (Reactant), SPN (Synthetic Preparation), RACT (Reactant or Reagent), PREP (Preparation). 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

Kumar, Jogendra published the artcileEnhancing the Extent of Enolization for α-C-H Bonds of Aliphatic Carboxylic Acid Equivalents via Ion Pair Catalysis: Application toward α-Chalcogenation, Related Products of isoquinoline, the main research area is thioether selenoether preparation regioselective; aliphatic carboxamide thiol thiolation potassium phosphate catalyst; diselenide aliphatic carboxamide selenylation potassium phosphate catalyst.

In general, the α-functionalization of carboxylic acid derivatives RCH2C(O)NHR1 [R = Me, n-Bu, Ph, 3-thienyl, etc.; R1 = pyridin-2-yl, 4-Methylpyridin-2-yl, pyrimidin-2-yl, etc.] requires either a transition metal catalyst or a stoichiometric activating agent/strong base/external additive. A transition metal free α-chalcogenation of aliphatic carboxylic acid equivalent was reported via ion pair formation using K3PO4 as a catalyst. Mild conditions, broad scope, scalability of the process, attaining bioactive glucokinase activators, and some synthetic intermediates establish merits of the strategy.

Journal of Organic Chemistry published new progress about C-H bond activation. 104-01-8 belongs to class isoquinoline, name is 4-Methoxyphenylacetic acid, and the molecular formula is C9H10O3, Related Products of isoquinoline.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Zhao, Feng published the artcileEnantioselective Synthesis of α-Aryl-β2-Amino-Esters by Cooperative Isothiourea and Broensted Acid Catalysis, Product Details of C9H10O3, the main research area is aminoarylpropanoate enantioselective preparation; enantioselective aminomethylation pentafluorophenyl arylacetate isothiourea hydrochloride catalyst; mechanism enantioselective aminomethylation pentafluorophenyl arylacetate acylisothiouronium intermediate; aminomethylation; cooperative catalysis; isothiourea; mechanistic studies; α-aryl-β-amino acid.

The synthesis of α-aryl-β2-amino esters such as (S)-Bn2NCH2CHPhCO2Me (Bn = PhCH2) through enantioselective aminomethylation of an arylacetic acid ester in high yields and enantioselectivity via cooperative isothiourea and Broensted acid catalysis is demonstrated. The scope and limitations of this process are explored (25 examples, up to 94% yield and 96:4 er), and the method was applied to the syntheses of (S)-venlafaxine hydrochloride and (S)-nakinadine B. Mechanistic studies are consistent with a C(1)-ammonium enolate pathway being followed rather than an alternative dynamic kinetic resolution process. Control studies indicate that (i) a linear effect between catalyst and product er is observed; (ii) an acyl ammonium ion can be used as a precatalyst; (iii) reversible isothiourea addition to an in situ generated iminium ion leads to an off-cycle intermediate that can be used as a productive precatalyst.

Angewandte Chemie, International Edition published new progress about Aminomethylation (stereoselective). 104-01-8 belongs to class isoquinoline, name is 4-Methoxyphenylacetic acid, and the molecular formula is C9H10O3, Product Details of C9H10O3.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Chen, Zhiwei published the artcileManufacturing Process Development for Belzutifan, Part 3: Completing a Streamlined Through-Process with a Safe and Scalable Oxidation, HPLC of Formula: 151-10-0, the main research area is belzutifan preparation stability solubility.

The development of a modified Kornblum oxidation mediated by 2-picoline N-oxide for the synthesis of belzutifan that circumvented safety and stench problems associated with the original clin. supply route conditions was reported. A robust quench for the crude bromination stream with 1,3-dimethoxybenzene and 2,6-lutidine enabled a single-solvent through-process that avoided the isolation of a mutagenic intermediate and resulted in a significantly lower process mass intensity. A ternary-solvent, constant-volume distillation was then used to crystallize the ketone product directly from the reaction mixture

Organic Process Research & Development published new progress about Dioxolanes Role: PRP (Properties), RCT (Reactant), SPN (Synthetic Preparation), RACT (Reactant or Reagent), PREP (Preparation). 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

Duan, Xiaodi published the artcileDecomposition of Iodinated Pharmaceuticals by UV-254 nm-assisted Advanced Oxidation Processes, Recommanded Product: Diatrizoic Acid, the main research area is decomposition iodinated pharmaceutical UV irradiation advanced oxidation wastewater; Diatrizoate; Hydrogen peroxide; Persulfate; Thyroxine; UV�54nm photolysis.

Iodinated pharmaceuticals, thyroxine (a thyroid hormone) and diatrizoate (an iodinated x-ray contrast medium), are among the most prescribed active pharmaceutical ingredients. Both of them have been reported to potentially disrupt thyroid homeostasis even at very low concentrations Here, UV-254 nm-based photolysis and photochem. processes, i.e., UV only, UV/H2O2, and UV/S2O82-, were evaluated for the destruction of these 2 pharmaceuticals. Approx. 40% of 0.5μM thyroxine or diatrizoate was degraded through direct photolysis at UV fluence of 160 mJ/cm2, probably resulting from the photosensitive cleavage of C-I bonds. While the addition of H2O2 only accelerated the degradation efficiency to a low degree, the destruction rates of both chems. were significantly enhanced in the UV/S2O82- system, suggesting the potential vulnerability of the iodinated chems. toward UV/S2O82- treatment. Such efficient destruction also occurred in the presence of radical scavengers when biol. treated wastewater samples were used as reaction matrixes. The effects of initial oxidant concentrations, solution pH, as well as the presence of natural organic matter (humic acid or fulvic acid) and alkalinity were also studied. These results provide insights for the removal of iodinated pharmaceuticals in water and/or wastewater using UV-based photochem. processes.

Journal of Hazardous Materials published new progress about Carbonates Role: OCU (Occurrence, Unclassified), PEP (Physical, Engineering or Chemical Process), OCCU (Occurrence), PROC (Process). 117-96-4 belongs to class isoquinoline, name is Diatrizoic Acid, and the molecular formula is C11H9I3N2O4, Recommanded Product: Diatrizoic Acid.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Wols, B. A. published the artcilePredicting pharmaceutical degradation by UV (MP)/H2O2 processes: A kinetic model, Recommanded Product: Diatrizoic Acid, the main research area is pharmaceutical photolysis water wastewater UV hydrogen peroxide kinetic model.

A kinetic model for the degradation of organic micropollutants (OMPs) by MP UV lamps was developed. The model includes (photo)chem. reactions of H2O2 and nitrate; reactions with the most important water matrix components; changes in pH; and transient radical concentrations Three pathways of organic micropollutant degradation are involved: direct photolysis, hydroxyl radical reactions and carbonate radical reactions. The model was validated using collimated beam experiments for a group of 35 pharmaceuticals in synthetic and natural water matrixes. For MP UV with 10 mg/L H2O2, good agreement between the modeled and measured degradation rates was found. For MP UV without H2O2, most of the pharmaceuticals were well predicted, except for the sulfonamides. A sensitivity anal. on different water matrix constituents was performed for MP UV with H2O2, NO3- and both H2O2 and NO3-. The most important chem. reactions for the degradation of OMPs are identified for different water matrixes.

Chemical Engineering Journal (Amsterdam, Netherlands) published new progress about Carbonates Role: OCU (Occurrence, Unclassified), PEP (Physical, Engineering or Chemical Process), OCCU (Occurrence), PROC (Process). 117-96-4 belongs to class isoquinoline, name is Diatrizoic Acid, and the molecular formula is C11H9I3N2O4, Recommanded Product: Diatrizoic Acid.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Cabrera-Pardo, Jaime R. published the artcileSelective Palladium(II)-Catalyzed Carbonylation of Methylene β-C-H Bonds in Aliphatic Amines, Recommanded Product: 2-Methyl-3-(3,4-methylenedioxyphenyl)propionaldehyde, the main research area is secondary aliphatic amine palladium carbon hydrogen bond carbonylation catalyst; beta lactam disubstituted stereoselective preparation; C−H activation; aliphatic amines; carbonylation; lactams; palladium catalysis.

Palladium(II)-catalyzed C-H carbonylation reactions of methylene C-H bonds in secondary aliphatic amines lead to the formation of trans-disubstituted β-lactams in excellent yields and selectivities. The generality of the C-H carbonylation process is aided by the action of xantphos-based ligands and is important in securing good yields for the β-lactam products.

Angewandte Chemie, International Edition published new progress about C-H bond activation. 1205-17-0 belongs to class isoquinoline, name is 2-Methyl-3-(3,4-methylenedioxyphenyl)propionaldehyde, and the molecular formula is C11H12O3, Recommanded Product: 2-Methyl-3-(3,4-methylenedioxyphenyl)propionaldehyde.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Bavan, Selvan published the artcileDiscovery of novel ligands for mouse olfactory receptor MOR42-3 using an in silico screening approach and in vitro validation, Name: 5-Methyl-2-phenylhex-2-enal, the main research area is Xenopus oocyte olfactory receptor heterologous odorant.

The ligands for many olfactory receptors remain largely unknown despite successful heterologous expression of these receptors. Understanding the mol. receptive range of olfactory receptors and deciphering the olfactory recognition code are hampered by the huge number of odorants and large number of olfactory receptors, as well as the complexity of their combinatorial coding. Here, we present an in silico screening approach to find addnl. ligands for a mouse olfactory receptor that allows improved definition of its mol. receptive range. A virtual library of 574 odorants was screened against a mouse olfactory receptor MOR42-3. We selected the top 20 candidate ligands using two different scoring functions. These 40 odorant candidate ligands were then tested in vitro using the Xenopus oocyte heterologous expression system and two-electrode voltage clamp electrophysiol. We exptl. confirmed 22 of these ligands. The candidate ligands were screened for both agonist and antagonist activity. In summary, we validated 19 agonists and 3 antagonists. Two of the newly identified antagonists were of low potency. Several previously known ligands (mono- and dic-arboxylic acids) are also confirmed in this study. However, some of the newly identified ligands were structurally dissimilar compounds with various functional groups belonging to aldehydes, phenyls, alkenes, esters and ethers. The high pos. predictive value of our in silico approach is promising. We believe that this approach can be used for initial deorphanization of olfactory receptors as well as for future comprehensive studies of mol. receptive range of olfactory receptors.

PLoS One published new progress about Dicarboxylic acids Role: PAC (Pharmacological Activity), PRP (Properties), THU (Therapeutic Use), BIOL (Biological Study), USES (Uses). 21834-92-4 belongs to class isoquinoline, name is 5-Methyl-2-phenylhex-2-enal, and the molecular formula is C13H16O, Name: 5-Methyl-2-phenylhex-2-enal.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem