Day: November 10, 2022

Faisal, Muhammad published the artcileA highly promising approach for the one-pot synthesis of biscoumarins using HY zeolite as recyclable and green catalyst, Application In Synthesis of 86-51-1, the main research area is biscoumarin preparation; hydroxycoumarin HY zeolite green catalyst.

Biscoumarins, the bridge substituted dimers of 4-hydroxycoumarin, are distinguished derivatives of coumarin. In view of numerous pharmaceutical applications of biscoumarins, the construction of appropriate one-pot synthetic methods for their preparation has been a subject of great attention in recent years. In continuation of ongoing study for the construction of promising approaches for the preparation of biscoumarins, herein we report a zeolite-mediated methodol., in which zeolites, for example, NaY, HY, HZSM-5 and H-beta were employed as catalysts to investigate their catalytic potencies in the synthesis of biscoumarins. In this approach, aromatic aldehydes were treated with 4-hydroxycoumarin in the presence of zeolite catalyst in refluxing ethanol for 2-3 h to furnish biscoumarins in 80-96% yield. The yield of biscoumarins increased in the following order NaY < HZSM-5 < H-beta < HY.Aldehydes both with electron-donating and electron-withdrawing units underwent smooth conversion to their resp. biscoumarins without the development of any side products. The cost-effective, eco-friendly and ready available zeolite catalyst could be recovered and reused several times. This methodol. offers operational simplicity and avoids the use of toxic solvents and corrosive reagents. The present approach offers remarkable advantages such as high catalytic activity, straight-forward procedure, simple workup and low catalyst loading. Journal of Porous Materials published new progress about Aryl 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, Application In Synthesis of 86-51-1.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Keerthisinghe, Tharushi Prabha published the artcileFeeding state greatly modulates the effect of xenobiotics on gut microbiome metabolism: A case study of tetracycline, SDS of cas: 104-01-8, the main research area is tetracycline microbiome metabolism xenobiotic feeding state greatly modulate; Fasted state; Fed state; Global metabolomics; Gut microbiome; Tetracycline.

The human gut microbiome is crucial in modulating host health mostly through bacterial metabolites. Chem. exposure is typical external stress which alters its composition and functionality. To date, very few studies have investigated the effect of feeding state on chem.-induced gut microbial metabolic dysregulations. Here, we set up an in vitro human gut microbiome and incorporated a metabolomics approach to investigate the effect of tetracycline (TET) at multiple doses (i.e., 10, 1, and 0.01 mg/L) on gut microbiome under the fed and fasted states. Overall, the metabolome was highly responsive at the fed state with 62 metabolites dysregulated while only 14 were altered at the fasted state under 10 mg/L (clin. TET dose). As expected, nutrient consumption was significantly inhibited under clin. TET dose at the fed state accumulating nutrients such as glutamate and leucine. Interestingly, at the fed state, TET could increase the synthesis of indole and Ph derivatives including indole-3-aldehyde and hydrocinnamate, while inhibiting indoxyl, tryptamine, and vitamin B production, all of which have host health implications. Furthermore, metabolites like indoxyl and xanthurenic acid were still responsive at 0.01 mg/L (dietary TET dose). Collectively, results demonstrated that the feeding state greatly modulates the chem.-induced gut microbial metabolic alterations.

Journal of Hazardous Materials published new progress about Alkaliphilus. 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

Saito, Yuki published the artcileContinuous-Flow Synthesis of (R)-Tamsulosin Utilizing Sequential Heterogeneous Catalysis, Name: 4-Methoxyphenylacetic acid, the main research area is polysilane modified palladium heterogeneous catalyst preparation; tamsulosin asym continuous flow synthesis; nitrile reductive amination sequential heterogeneous catalysis; Continuous-Flow Synthesis; Heterogeneous Catalysis; Hydrogenation; Multistep Flow Synthesis; Reductive Amination.

The continuous-flow synthesis of (R)-tamsulosin, I, a blockbuster therapeutic drug employed for dysuria associated with urinary stones and benign prostatic hyperplasia, by utilizing sequential heterogeneous catalysis was described. Two heterogeneous catalysts were developed for the synthesis and key step involves reductive amination of nitriles using dimethylpolysilane-modified Pd on activated carbon/calcium phosphate. Overall, (R)-tamsulosin was obtained in 60% yield and 64% ee (99% ee after recrystallization) in a flow stream through four catalytic transformations without the need for the isolation or purification of any intermediates or byproduct.

Angewandte Chemie, International Edition published new progress about Nitriles 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

Dong, Jianyang published the artcileLight-Mediated Difluoromethylthiolation of Aldehydes with a Hydrogen Atom Transfer Photocatalyst, Formula: C11H12O3, the main research area is difluoromethyl thioester preparation light photocatalyst difluoromethylthiolation aldehyde.

A mild general method for difluoromethylthiolation of aldehydes with PhSO2SCF2H and a decatungstate photocatalyst under redox-neutral conditions has been developed. This reaction is highly efficient, scalable, and oxidant-free. The broad substrate scope and excellent functional group tolerance of the reaction make it suitable for generating libraries of difluoromethyl thioesters. We demonstrated the utility and sustainability of the method by synthesizing several structurally complex difluoromethyl thioesters.

Organic Letters published new progress about Aryl aldehydes Role: RCT (Reactant), SPN (Synthetic Preparation), RACT (Reactant or Reagent), PREP (Preparation). 1205-17-0 belongs to class isoquinoline, name is 2-Methyl-3-(3,4-methylenedioxyphenyl)propionaldehyde, and the molecular formula is C11H12O3, Formula: C11H12O3.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Sugihara, Matthew N. published the artcileTiO2-photocatalyzed transformation of the recalcitrant x-ray contrast agent diatrizoate, Recommanded Product: Diatrizoic Acid, the main research area is x ray contrast agent diatrizoate wastewater photocatalytic treatment; diatrizoate wastewater photocatalytic degradation advanced oxidation reductive dehalogenation.

Iodinated x-ray contrast media (ICM) are biol. recalcitrant chems. that are often detected in wastewater-impacted environments at higher concentrations than other pharmaceutical micropollutants of concern. Diatrizoate is an anionic ICM that is especially resistant to conventional wastewater and drinking water treatment processes. This study examined the aqueous photocatalytic treatment of diatrizoate using nanophase titanium dioxide (TiO2). Experiments demonstrated that diatrizoate can be degraded in aqueous TiO2 suspensions illuminated with UV-A light. In oxic solutions, diatrizoate degraded principally via oxidation by adsorbed OH radicals, releasing iodine substituents stoichiometrically, but causing little mineralization of organic C and N. Introduction of OH scavengers significantly slowed the rate of photocatalytic degradation At circumneutral pH, diatrizoate was oxidized much more slowly than iopromide, a nonionic ICM, in part because of unfavorable electrostatic interactions with the neg. charged TiO2 surface; increased rates of oxidation observed at lower pH conditions can be attributed to more favorable diatrizoate-TiO2 sorptive interactions. Experiments also demonstrated that diatrizoate was degraded at appreciable rates in anoxic solutions, and reductive dehalogenation products are identified by liquid chromatog.-mass spectrometry. The higher selectivity of reductive processes suggests a promising strategy for targeted treatment of recalcitrant ICM in organic-rich matrixes like wastewater effluent.

Applied Catalysis, B: Environmental published new progress about Mass spectra (of diatrizoate and transformation products). 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

Zhou, Cong published the artcilePhotoredox-Catalyzed α-Aminomethyl Carboxylation of Styrenes with Sodium Glycinates: Synthesis of γ-Amino Acids and γ-Lactams, Safety of 4-Methoxy-N-methylaniline, the main research area is arylaminoarylbutanoic acid arylbutyrolactam regioselective preparation; ruthenium photoredox catalyst regioselective aminomethylcarboxylation arylaminoglycine aryl alkene; iridium photoredox catalyst regioselective aminomethylcarboxylation lactamization arylaminoglycine aryl alkene.

A visible-light photoredox-catalyzed reductive α-aminomethyl carboxylation of styrenes and 1,1-diarylalkenes with sodium N-arylglycinates and CO2 has been developed to synthesize a series of α,α-disubstituted γ-amino acids such as MePhNCH2CH2CPh2CO2H and γ-lactams such as 1,3,3-triphenyl-2-pyrrolidinone with high efficiency and regioselectivity. Notably, CO2 released from the decarboxylation step can be reused for the subsequent carboxylation. Distinct from the previous reactions with the same type of substrates leading to simple decarboxylation and olefin hydroalkylation, this process involves addnl. CO2 sequestration, thus leading to olefin α-aminomethyl carboxylation. These findings not only provide new access to α,α-disubstituted γ-amino acids and γ-lactams but also serve as a proof of concept for CO2 reutilization in decarboxylation reactions.

Organic Letters published new progress about Aminomethylation (regioselective, photochem., carboxylation). 5961-59-1 belongs to class isoquinoline, name is 4-Methoxy-N-methylaniline, and the molecular formula is C8H11NO, Safety of 4-Methoxy-N-methylaniline.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Zhang, Kaining published the artcileDehydroxymethylation of Alcohols Enabled by Cerium Photocatalysis, SDS of cas: 104-01-8, the main research area is alc photocatalytic dehydroxymethylation functional group transformation; photocatalytic dehydroxymethylation natural product alkanol functional group transformation.

Dehydroxymethylation, the direct conversion of alc. feedstocks as alkyl synthons containing one less carbon atom, is an unconventional and underexplored strategy to exploit the ubiquity and robustness of alc. materials. Under mild and redox-neutral reaction conditions, utilizing inexpensive cerium catalyst, the photocatalytic dehydroxymethylation platform has been furnished. Enabled by ligand-to-metal charge transfer catalysis, an alc. functionality has been reliably transferred into nucleophilic radicals with the loss of one mol. of formaldehyde. Intriguingly, we found that the dehydroxymethylation process can be significantly promoted by the cerium catalyst, and the stabilization effect of the fragmented radicals also plays a significant role. This operationally simple protocol has enabled the direct utilization of primary alcs. as unconventional alkyl nucleophiles for radical-mediated 1,4-conjugate additions with Michael acceptors. A broad range of alcs., from simple ethanol to complex nucleosides and steroids, have been successfully applied to this fragment coupling transformation. Furthermore, the modularity of this catalytic system has been demonstrated in diversified radical-mediated transformations including hydrogenation, amination, alkenylation, and oxidation

Journal of the American Chemical Society published new progress about Fluorescence. 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

Lemmens, Vincent published the artcileRu-Bipyridine Entrapped in the Supercages of EMC-1 Faujasite as Catalyst for the Trifluoromethylation of Arenes, Quality Control of 151-10-0, the main research area is hetero arene trifluoromethylation ruthenium bipyridine supercage faujasite catalyst photochem; Ru(bipy)32+; faujasite; heterogeneous catalysis; photocatalysis; trifluoromethylation.

Trifluoromethyl (CF3) groups are versatile structural motifs especially in the field of agrochems. and pharmaceuticals. However, current trifluoromethylation reactions are generally associated with stoichiometric amounts of transition metals/metal oxidants, homogeneous catalysts, high temperatures, and expensive trifluoromethylating agents. In this work, the homogeneous photocatalyst Ru(bipy)32+ is entrapped in the pores of a faujasite support (EMC-1) via a “”ship-in-a-bottle”” strategy. The formation of the coordination compound was confirmed by Fourier transform IR (FTIR), UV-Vis spectroscopy, and X-ray absorption spectroscopy (XAS). Due to its high stability toward acidified environments, this single-site heterogeneous catalyst is suitable for the trifluoromethylation of synthetically interesting (hetero)arenes under visible-light irradiation at room temperature Furthermore, the heterogeneous catalyst could efficiently be reused for at least three times with minimal catalyst leaching/deactivation.

ACS Applied Materials & Interfaces published new progress about Heterocyclic compounds Role: 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, Quality Control of 151-10-0.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Bora, Pranjal P. published the artcileShielding Effect of Micelle for Highly Effective and Selective Monofluorination of Indoles in Water, SDS of cas: 151-10-0, the main research area is indole fluoro bisbenzenesulfonimide water surfactant medium regioselective monofluorination; fluoroindole preparation green chem; arene fluorobenzenesulfonimide water surfactant medium regioselective monofluorination; fluoroarene preparation green chem; E-factor; fluorination; green chemistry; micelles; sustainability.

Highly selective direct monofluorination of indoles and arenes was developed through an approach that allows site-specific solubility of substrate and fluorine source in the micelle. This approach was highly selective for a broad range of substrates with excellent functional group tolerance. Differences in binding constant and solubility of indoles and arenes in the micelle allowed the fine-tuning of selectivity. Control experiments suggested a radical pathway and provided insight into the role of micelles of the environmentally benign amphiphile PS-750-M. Dynamic light scattering experiments strongly indicated the site-specific solubility of the substrate and fluorine source. The methodol. was successfully adapted to gram scale and the E-factor established from a recycle study indicated that the process was environmentally responsible and sustainable.

ChemSusChem published new progress about Fluorination, regioselective. 151-10-0 belongs to class isoquinoline, name is 1,3-Dimethoxybenzene, and the molecular formula is C8H10O2, SDS of cas: 151-10-0.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Kanemoto, Kazuya published the artcileAcid-Mediated Sulfonylthiolation of Arenes via Selective Activation of SS-Morpholino Dithiosulfonate, Recommanded Product: 1,3-Dimethoxybenzene, the main research area is thiosulfonate preparation regioselective; arene morpholinotoluene dithioperoxosulfonate desulfurilative sulfonylthiolation trifluoro acetic acid.

A trifluoroacetic-acid-mediated desulfurilative sulfonylthiolation of arenes RH (R = 4-methoxyphenyl, thiophen-2-yl, 6-bromo-2-hydroxynaphthalen-1-yl, etc.) using SS-morpholino 4-toluene(dithioperoxo)sulfonate is described. This system is based on selective activation of the morpholino group over the tosyl group of the doubly transformable sulfur surrogate. Mechanistic studies suggested that the reaction proceeds through electrophilic aromatic substitution followed by sulfur extrusion. The wide substrate scope of this reaction and the transformability of the resulting thiosulfonates RSTs enable expeditious access to divergent multifunctionalized sulfides.

Organic Letters published new progress about Bond formation catalysts. 151-10-0 belongs to class isoquinoline, name is 1,3-Dimethoxybenzene, and the molecular formula is C8H10O2, Recommanded Product: 1,3-Dimethoxybenzene.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem