Category: isoquinoline

Marseglia, Angela published the artcileVolatile fingerprint of unroasted and roasted cocoa beans (Theobroma cacao L.) from different geographical origins, Application In Synthesis of 21834-92-4, the main research area is cocoa bean authenticity volatile geol HSSPME GC MS; Authenticity; Fermented cocoa beans; Fingerprint; Geographical origin; Roasted cocoa beans; Volatilome.

The aroma characterization of 58 unroasted cocoa beans from 22 different geog. origins was performed by head space solid phase micro-extraction (HS-SPME) combined with gas chromatog.-mass spectrometry (GC-MS). Sampling is representative of the average world production (America, Africa, and Southeast Asia). Anal. of cocoa beans before and after roasting were performed to follow the aroma modification with the aim to achieve a cocoa volatile fingerprint and a discrimination model based on beans origin. A total of 57 volatiles was identified in unroasted cocoa beans, while 71 volatiles were identified in roasted cocoa beans. The compounds belong to several chem. groups including esters, alcs., organic acids, aldehydes, ketones and pyrazines. Datasets were submitted to multivariate statistical anal. (Principal Component Anal., PCA). Results allowed to discriminate unroasted cocoa beans based on their geog. origin: samples coming from African countries were separated from samples of American regions, whereas samples from Southeast Asia lie between the other two continents suggesting that Asian samples have intermediate characteristics between African and South American cocoa beans. PCA, applied on the corresponding roasted samples, showed that although the same roasting treatment has been applied to all the samples, the differences among the unroasted samples were also maintained in the aromatic profile after roasting. The discrimination model based on volatile fingerprint combined with chemometric tools, showed interesting potential for origin authentication of both unroasted and roasted cocoa beans.

Food Research International published new progress about Alcohols Role: ANT (Analyte), ANST (Analytical Study). 21834-92-4 belongs to class isoquinoline, name is 5-Methyl-2-phenylhex-2-enal, and the molecular formula is C13H16O, Application In Synthesis of 21834-92-4.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Triandafillidi, Ierasia published the artcilePhotocatalytic Synthesis of γ-Lactones from Alkenes: High-Resolution Mass Spectrometry as a Tool To Study Photoredox Reactions, Product Details of C11H12O3, the main research area is gamma lactone regioselective preparation; terminal disubstituted alkene regioselective photoredox cycloaddition iodoacetate ruthenium catalyst; mechanism photoredox cycloaddition iodoacetate alkene detection intermediate mass spectrometry.

γ-Lactones such as 5-octyl-γ-butyrolactone were prepared regioselectively in 40-98% yields by photoredox cycloaddition of iodoacetic acid, bromoacetic acid, or 2-bromopropanoic acid with alkenes in the presence of Ru(bpy)3Cl2 and sodium ascorbate in MeOH/MeCN at ambient temperature Intermediates in the cycloaddition of iodoacetic acid and 1-allyloxy-4-fluorobenzene were detected by high-resolution mass spectrometry (HRMS) and provided evidence for a proposed mechanism.

Organic Letters published new progress about Alkenes Role: RCT (Reactant), RACT (Reactant or Reagent). 1205-17-0 belongs to class isoquinoline, name is 2-Methyl-3-(3,4-methylenedioxyphenyl)propionaldehyde, and the molecular formula is C11H12O3, Product Details of C11H12O3.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Wang, Lihong published the artcileVisible light-mediated NHCs and photoredox co-catalyzed radical 1,2-dicarbonylation of alkenes for 1,4-diketones, Quality Control of 86-51-1, the main research area is diketone preparation photocatalysis; alkene acyl fluoride alpha keto acid dicarbonylation NHC cocatalyst.

Dicarbonylation of alkenes provides direct access to value-added 1,4-dicarbonyl compounds However, selectivity control for unsym. 1,2-dicarbonylation is of great challenge. Herein authors describe NHCs and photocatalysis co-catalyzed three-component radical 1,2-dicarbonylation of alkenes by distinguishing two carbonyl groups, providing structurally diversified 1,4-diketones. Distinct properties of acyl radical and NHCs-stabilized ketyl radical contributed to selectivity control. Acyl radicals are rapidly added to alkenes delivering alkyl radicals, which underwent subsequent radical-radical cross-coupling with NHCs-stabilized ketyl-type radicals, affording 1,2-dicarbonylation products. This transformation features mild reaction conditions, broad substrate scope, and excellent selectivity, providing a general and practical approach for the dicarbonylation of olefins.

Science China: Chemistry published new progress about Alkenes 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, Quality Control of 86-51-1.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Paganelli, Stefano published the artcileAqueous biphasic hydrogenations catalyzed by new biogenerated Pd-polysaccharide species, SDS of cas: 1205-17-0, the main research area is aqueous hydrogenation catalyzed biogenerated palladium polysaccharide species.

A palladium species bound to an exopolysaccharide (Pd-EPS) was obtained from alive bacterial cells of Klebsiella oxytoca BAS-10 grown in static mode in the presence of Pd(NO3)2. Pd-EPS, after isolation and purification, was used as catalyst in the aqueous biphasic hydrogenation either of unfunctionalyzed olefins, as styrene, 1-octene and 1,3-diisopropenylbenzene, or of some α,β-unsaturated aldehydes. The catalytic system was very active under mild reaction conditions and its activity was maintained in some recycle experiments Even more efficient was the “”activated Pd-EPS””, obtained by a pre-treatment of Pd-EPS with 1 MPa of H2 at 30 °C for 21 h; while Pd-EPS originally contains only Pd(II), as demonstrated by XPS measurements, the activated catalyst shows the presence of both Pd(II) and Pd(0) in the ratio 1.9/1. The two catalytic systems show different structures at TEM observations evidencing the transformation of electron ultradense nanoaggregates (Pd-EPS) into jagged microaggregates (“”activated Pd-EPS””).

Applied Catalysis, A: General published new progress about Alkenes Role: RCT (Reactant), RACT (Reactant or Reagent). 1205-17-0 belongs to class isoquinoline, name is 2-Methyl-3-(3,4-methylenedioxyphenyl)propionaldehyde, and the molecular formula is C11H12O3, SDS of cas: 1205-17-0.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Voutyritsa, Errika published the artcileExpanding the scope of photocatalysis: atom transfer radical addition of bromoacetonitrile to aliphatic olefins, HPLC of Formula: 1205-17-0, the main research area is photocatalysis radical addition reaction bromocyanomethylation optimization olefins.

An efficient photocatalyzed bromocyanomethylation of alkenes is reported. Among a range of organocatalysts and metal complexes, Ir(ppy)3 proved to be the best photocatalyst in promoting the addition of BrCH2CN to olefins. This photocatalytic atom transfer protocol can be expanded into a wide substrate scope of aliphatic olefins bearing various functional groups, leading to the corresponding products in good to excellent yields. In addition, linchpin catalysis was developed, since the bromo group can undergo further transformation into useful functional groups, such as the synthesis of amino acids.

ChemCatChem published new progress about Alkenes Role: RCT (Reactant), RACT (Reactant or Reagent). 1205-17-0 belongs to class isoquinoline, name is 2-Methyl-3-(3,4-methylenedioxyphenyl)propionaldehyde, and the molecular formula is C11H12O3, HPLC of Formula: 1205-17-0.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Ramesh, Vinay Bapu published the artcileRh(III)-Catalyzed Distal C-H Alkenylation of Weakly Coordinating Acetamides Via Desilylation Pathway, Safety of 4-Methoxyphenylacetic acid, the main research area is alkenylphenylacetamide regioselective diastereoselective preparation; rhodium catalyst directed regioselective stereoselective alkenylation arylacetamide arylethynylsilane; substituent deuterium kinetic isotope effect regioselective alkenylation arylacetamide arylethynylsilane; mechanism rhodium catalyzed regioselective stereoselective alkenylation arylacetamide arylethynylsilane.

In the presence of [Cp*RhCl2]2 , pivalic acid, and AgSbF6, arylacetamides such as PhCH2CONHi-Pr underwent regioselective and diastereoselective alkenylation with arylethynylsilanes RCCSiMe3 (R = Ph, 4-MeC6H4, 2-MeC6H4, 4-t-BuC6H4, 4-FC6H4, 3-FC6H4, 2-BrC6H4, 4-ClC6H4, 1-naphthyl, 2-thienyl, 4-MeOC6H4) to yield ortho-alkenylphenylacetamides such as I (R = Ph, 4-MeC6H4, 2-MeC6H4, 4-t-BuC6H4, 4-FC6H4, 3-FC6H4, 2-BrC6H4, 4-ClC6H4, 1-naphthyl, 2-thienyl, 4-MeOC6H4). The effect of substitution on the arylacetamide moiety and the deuterium kinetic isotope effect were determined, deuterium labeling experiments were performed, and a silylalkenylarylacetamide intermediate was isolated to provide evidence for the mechanism of the reaction; the in situ-generated rhodium species is likely to be Lewis acidic and to play a role in the desilylation step.

Advanced Synthesis & Catalysis published new progress about Alkenylation catalysts, stereoselective (regioselective). 104-01-8 belongs to class isoquinoline, name is 4-Methoxyphenylacetic acid, and the molecular formula is C9H10O3, Safety of 4-Methoxyphenylacetic acid.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Cheng, Wei-Chieh published the artcileFurther insights on structural modifications of muramyl dipeptides to study the human NOPD2 stimulating activity, Category: isoquinoline, the main research area is muramyl dipeptide structural modification human NOPD2 stimulating activity; dipeptide muramyl synthesis Staudinger reaction Click chem; Click chem azide alkyne cycloaddition copper catalyst; Biological activity; Innate immunity; Muramyl dipeptide (MDP); NOD2; Peptidoglycan; Structure activity relationship.

A series of muramyl dipeptide (MDP) analogs with structural modifications at the C4 position of MurNAc and on the D-iso-glutamine (isoGln) residue of the peptide part were synthesized. The C4-diversification of MurNAc was conveniently achieved by using CuAAC click strategy to conjugate an azido muramyl dipeptide precursor with structurally diverse alkynes. D-Glutamic acid (Glu), replaced with isoGln, was applied for the structural diversity through esterification or amidation of the carboxylic acid. In total, 26 MDP analogs were synthesized and bio-evaluated for the study of human NOD2 stimulation activity in the innate immune response. Interestingly, MDP derivatives with an ester moiety are found to be more potent than reference compound MDP itself or MDP analogs containing an amide moiety. Among the varied lengths of the alkyl chain in ester derivatives, the MDP analog bearing the D-glutamate dodecyl (C12) ester moiety showed the best NOD2 stimulation potency.

Chemistry – An Asian Journal published new progress about Alkynes 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, Category: isoquinoline.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

To, Tuong A. published the artcileIron-catalyzed one-pot sequential transformations:synthesis of quinazolinones via oxidative Csp3-H bond activation using a new metal-organic framework as catalyst, SDS of cas: 104-01-8, the main research area is iron catalyst preparation; quinazolinone green preparation; phenylacetic acid aminobenzamide tandem activation cyclization iron catalyst; diamine phenylacetic acid tandem activation cyclization iron catalyst.

A new mixed-linker iron-based MOF VNU-21 [Fe3(BTC)(EDB)2·12.27H2O] was synthesized via mixed-linker synthetic strategy using 1,3,5-benzenetricarboxylic acid, 4,4′-ethynylenedibenzoic acid and FeCl2. The VNU-21 was consequently used as a recyclable heterogeneous catalyst in the one-pot synthesis of quinazolinones I [R = H, 2-Me, 4-Br, etc.; R1 = H, 7-Me, 6-F, etc.] via two steps under oxygen atm. The synthetic scheme involved iron-catalyzed oxidative Csp3-H bond activation to achieve decarboxylation of phenylacetic acids and succeeding metal-free oxidative cyclization with 2-aminobenzamides. The VNU-21 was more effective than a series of heterogeneous and homogeneous catalysts. It was possible to reutilized the iron-based framework without a considerable deterioration in catalytic performance.

Journal of Catalysis published new progress about Amides 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, SDS of cas: 104-01-8.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Duan, Peng published the artcileConstruction of Fluorinated Amino Acid Derivatives via Cobalt-Catalyzed Oxidative Difunctionalization of Cyclic Ethers, Quality Control of 5961-59-1, the main research area is trifluoromethyl amino acid ester preparation diastereoselective; amine cyclic ether ethyl trifluoropyruvate oxidative difunctionalization cobalt catalyst.

A new synthetic method for the efficient construction of novel fluorinated γ-amino acid esters I (n = 1, 2; R = H, Me; R1 = methyl(phenyl)aminyl, 1,2,3,4-tetrahydroquinolin-1-yl, 1H,2H,3H-pyrrolo[2,3-b]pyridin-1-yl, etc.) via difunctionalization of the α- and β-sites of cyclic ethers such as THF, tetrahydropyran, 2-methyloxolane and 2,3-dihydrofuran, by employing a CoBr2/m-CPBA catalyst system was demonstrated. Several cyclic ethers were transformed in combination with a vast range of amines such as 4-methylaniline, thiomorpholine, tetrahydroquinoline, etc. and Et trifluoropyruvate into the desired products I under mild conditions, making this method a practical platform to enrich the library of fluorinated amino acid derivatives from cost-effective and readily available feedstocks.

Organic Letters published new progress about Amines 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, Quality Control of 5961-59-1.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Khan, Irfan published the artcileA versatile pre and post Ugi modification for the synthesis of natural product inspired fused peptide-carboline scaffolds as potential anti-leishmanial agents, Name: 4-Methoxyphenylacetic acid, the main research area is natural product synthesis peptide carboline peptidomimetic anti leishmanial agent; leishmanicidal structure activity amastigote promastigote cytotoxicity mol docking pharmacokinetic; amine amino acid isocyanide aldehyde Ugi reaction antiamastigote activity; drug design toxicity carcinogenicity.

A series of novel β-carboline-peptide/tetrahydro-β-carbolines-peptide has been synthesized via natural product inspired mol. hybridization approach. All the hybrids were examined for their anti-leishmanial potential. Most of the screened derivatives exhibited significant in vitro anti-leishmanial activity against promastigote and intracellular amastigotes (IC50 ranging from 2.43 to 7.61μM) than the control, miltefosine (IC50 = 8.2μM), with less cytotoxicity in comparison to the standard drugs (sodium stibogluconate, and miltefosine). Compound (I) was also able to inhibit Leishmania donovani TR (LdTR). A mol. modeling study based on docking and subsequent binding free energy evaluation was carry out in the active site of LdTR to understand their possible binding site. Our results show that prepared β-carboline-peptide/tetrahydro-β-carbolines-peptide represent a new structural lead for anti-leishmanial chemotherapy.

ChemistrySelect published new progress about Amines 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