Tag: M.W=150-200

Xia, Yingqi published the artcileCatalytic Syn-Selective Nitroaldol Approach to Amphenicol Antibiotics: Evolution of a Unified Asymmetric Synthesis of (-)-Chloramphenicol, (-)-Azidamphenicol, (+)-Thiamphenicol, and (+)-Florfenicol, Name: 2,3-Dimethoxybenzaldehyde, the main research area is nitro diol preparation diastereoselective enantioselective Henry copper catalyst; aryl aldehyde nitroethanol.

A unified strategy for an efficient and high diastereo- and enantioselective synthesis of (-)-chloramphenicol, (-)-azidamphenicol, (+)-thiamphenicol, and (+)-florfenicol based on a key catalytic syn-selective Henry reaction was reported. The stereochem. of the ligand-enabled copper(II)-catalyzed aryl aldehyde Henry reaction of nitroethanol was first explored to forge a challenging syn-2-amino-1,3-diol structure unit with vicinal stereocenters with excellent stereocontrol. Multistep continuous flow manipulations were carried out to achieve the efficient asym. synthesis of this family of amphenicol antibiotics.

Journal of Organic Chemistry 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, Name: 2,3-Dimethoxybenzaldehyde.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Clare, Daniel published the artcileChemospecific Cyclizations of α-Carbonyl Sulfoxonium Ylides on Aryls and Heteroaryls, HPLC of Formula: 104-01-8, the main research area is chemospecific cyclization carbonyl sulfoxonium ylide aryl heteroaryl; safety advantage carbonyl sulfoxonium ylide; chemospecifity; cyclization; hexafluoroisopropanol; iridium; sulfoxonium.

The functionalization of aryl and heteroaryls using α-carbonyl sulfoxonium ylides without the help of a directing group has remained so far a neglected area, despite the advantageous safety profile of sulfoxonium ylides (safety: an α-diazo ketone was potentially explosive, whereas an α-carbonyl sulfoxonium ylide was not). Described herein are the cyclizations of α-carbonyl sulfoxonium ylides onto benzenes, benzofurans and N-p-toluenesulfonyl indoles in the presence of a base in HFIP [e.g., I â†?II (91%) in presence of K2CO3 in HFIP], whereas pyrroles and N-Me indoles undergo cyclization in the presence of an iridium catalyst. Significantly, these two sets of conditions are chemospecific for each groups of substrates.

Angewandte Chemie, International Edition published new progress about Carbonyl compounds (organic), diazo Role: RCT (Reactant), RACT (Reactant or Reagent) (exothermic decomposition of α-diazo ketone vs. α-carbonyl sulfoxonium ylide). 104-01-8 belongs to class isoquinoline, name is 4-Methoxyphenylacetic acid, and the molecular formula is C9H10O3, HPLC of Formula: 104-01-8.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Liu, Haocheng published the artcileA comparative study of aromatic characterization of Yingde Black Tea infusions in different steeping temperatures, SDS of cas: 21834-92-4, the main research area is Yingde black tea steeping temperature aromatic characterization.

Black tea, known for its unique aroma, is one of the most popular non-alc. beverages. Because of complex aroma composition, studying black tea aroma has attracted widespread attention. The aim of this study was to evaluate the effect of different steeping temperatures (60°C, 70°C, 80°C, and 95°C) on the aroma composition of Yingde black tea for the first time. A total of 157 volatile compounds were identified by gas chromatog.-mass spectrometry (GC-MS). These compounds can be divided into 11 categories, including alcs., esters, ketones, aldehydes, terpenes and sulfides. The types of different volatile compounds and contents in tea infusion samples show a pos. correlation with steeping temperature A total of 16 main aromatic compounds were identified though the comparison anal. of gas chromatog.-olfactometry (GC-O FD â‰?32) data and odor activity value (OAV value â‰?1), including β-damascone, β-ionone, linalool, Et hexanoate, di-Me sulfide, di-Me trisulfide, nonanal, Me salicylate, 3-hexenyl isovalerate, cedrol, and longifolene. A correlation of characteristic aroma data with descriptive sensory anal. (DSA) data clearly established that different steeping temperatures result in different overall aroma qualities of the black tea, indicating that steeping temperature is a key parameter affecting the aroma composition

LWT–Food Science and Technology published new progress about Aldehydes Role: ANT (Analyte), FFD (Food or Feed Use), ANST (Analytical Study), 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, SDS of cas: 21834-92-4.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Xia, Hai-Dong published the artcilePhotoinduced Copper-Catalyzed Asymmetric Decarboxylative Alkynylation with Terminal Alkynes, Category: isoquinoline, the main research area is alkylcarboxylic ester alkyne copper enantioselective radical decarboxylative alkynylation light; chiral internal alkyne preparation; alkynylation; asymmetric radical reactions; copper; decarboxylation; photocatalysis.

We describe a photoinduced copper-catalyzed asym. radical decarboxylative alkynylation of bench-stable N-hydroxyphthalimide(NHP)-type esters of racemic alkyl carboxylic acids with terminal alkynes, which provides a flexible platform for the construction of chiral C(sp3)-C(sp) bonds. Critical to the success of this process are not only the use of the copper catalyst as a dual photo- and cross-coupling catalyst but also tuning of the NHP-type esters to inhibit the facile homodimerization of the alkyl radical and terminal alkyne, resp. Owing to the use of stable and easily available NHP-type esters, the reaction features a broader substrate scope compared with reactions using the alkyl halide counterparts, covering (hetero)benzyl-, allyl-, and aminocarbonyl-substituted carboxylic acid derivatives, and (hetero)aryl and alkyl as well as silyl alkynes, thus providing a vital complementary approach to the previously reported method.

Angewandte Chemie, International Edition published new progress about Alkynes, α- 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

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

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

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

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

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

Hu, Yuheng published the artcileSynthesis and biological evaluation of 3-arylcoumarin derivatives as potential anti-diabetic agents, SDS of cas: 104-01-8, the main research area is arylcoumarin derivative preparation diabetes structure antioxidant AGE glucosidase; 3-Arylcoumarin; AGEs inhibitor; antidiabetic; α-glucosidase inhibitor.

A variety of substituted 3-arylcoumarin derivatives were synthesized through microwave radiation heating. The method has characteristics of environmental friendliness, economy, simple separation, and purification process, less byproducts and high reaction yield. Those 3-arylcoumarin derivatives were screened for antioxidant, α-glucosidase inhibitory and advanced glycation end-products (AGEs) formation inhibitory. Most compounds exhibited significant antioxidant and AGEs formation inhibitory activities. Anti-diabetic activity studies showed that compounds and were equipotent to the standard drug glibenclamide in vivo. According to the exptl. results, the target compound can be used as a lead compound for the development of new anti-diabetic drugs. The whole experiment showed that anti-diabetic activity is prevalent in 3-arylcoumarins, which added a new natural skeleton to the development of anti-diabetic active drugs.

Journal of Enzyme Inhibition and Medicinal Chemistry published new progress about Antidiabetic agents. 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