Tag: M.W=150-200

Ramachandran, P. Veeraraghavan published the artcileIrreversible aldolization of ketones with bisdicyclohexylboron enediolates, Quality Control of 104-01-8, the main research area is hydroxy acid preparation diastereoselective; ketone bisdicyclohexylboron enolate irreversible aldolization.

Reversible addition of ketone enolborinates to ketones RCOR1 (R = Et, 4-bromophenyl, cyclohexyl, etc.; R1 = H, chloromethyl, Ph, 3-ethoxy-3-oxoprop-1-en-1-yl, etc.) and the aldolization of ketones with bisboron enediolates derived from carboxylic acids R2CH2C(O)OH (R2 = Me, Cl, ph, etc.) proceed without difficulty. A variety of α,β,β-trisubstituted-β-hydroxy acids syn/anti-RC(OH)(R1)CH(R2)C(O)OH have been thus synthesized in good to excellent yields and diastereoselectivities.

Tetrahedron Letters published new progress about Aldol condensation (irreversible). 104-01-8 belongs to class isoquinoline, name is 4-Methoxyphenylacetic acid, and the molecular formula is C9H10O3, Quality Control of 104-01-8.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Popova, Antonina V. published the artcileSynthesis of anabasine-containing aminomethyl derivatives of 6-hydroxyaurones, Category: isoquinoline, the main research area is hydroxyaurone anabasine paraformaldehyde regioselective diastereoselective aminomethylation; pyridinyl piperidinylmethyl hydroxyaurone preparation.

Aminomethylation of aurones was studied by using anabasine. The reaction in the case of 6-hydroxyaurones was shown to selectively provide 7-aminomethyl-6-hydroxyaurones while 5-aminomethyl-6-hydroxy-7-methylaurones could be obtained by transamination of 5-dimethylaminomethyl derivatives of 6-hydroxy-7-methylaurones in the presence of anabasine.

Chemistry of Heterocyclic Compounds (New York, NY, United States) published new progress about Aminomethylation (regioselective). 86-51-1 belongs to class isoquinoline, name is 2,3-Dimethoxybenzaldehyde, and the molecular formula is C9H10O3, Category: isoquinoline.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Uemura, Takahito published the artcileEasy access to both enantiomers of 5-hydroxyequol and 3-(4-hydroxyphenyl)chroman-8-ol, Safety of 2,3-Dimethoxybenzaldehyde, the main research area is hydroxyequol hydroxyphenyl chromanol preparation enantioselective; trimethoxyphenyl dimethoxyphenyl propanal diaryliodonium salt arylation MacMillan catalyst cyclization.

5-Hydroxyequol, a biol. active isoflavone metabolite from genistein, has been synthesized enantioselectively from 3-(2,4,6-trimethoxyphenyl)propanal by using MacMillans’ asym. α-arylation protocol of carbonyl compound (S)- and (R)-5-hydroxyequols have been obtained in 90% and 88% ee, resp., by employing enantiomeric imidazolidinone catalysts derived from D- and L-phenylglycines. The absolute configuration of natural 5-hydroxyequol has been definitely assigned to (S)-stereochem. (S)- And (R)-3-(4-hydroxyphenyl)chroman-8-ol, an unnatural equol isomer, have also been synthesized for the first time in 76% and 84% ee, resp.

Results in Chemistry published new progress about Arylation catalysts, stereoselective. 86-51-1 belongs to class isoquinoline, name is 2,3-Dimethoxybenzaldehyde, and the molecular formula is C9H10O3, Safety of 2,3-Dimethoxybenzaldehyde.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Triandafillidi, Ierasia published the artcileSynthesis of γ-Lactones Utilizing Ketoacids and Trimethylsulfoxonium Iodide, Formula: C11H12O3, the main research area is gamma hydroxymethyl lactone preparation; Johnson Corey Chaykovsky reaction gamma ketoacid methylsulfoxonium iodide; delta lactone gamma ketoamide cyclocondensation methylsulfoxonium iodide.

γ-Ketoacids, a δ-ketoacid, and a γ-ketoamide underwent Johnson-Corey-Chaykovsky epoxidation with trimethylsulfoxonium iodide and NaH in DMSO to yield γ-(hydroxymethyl)-γ-lactones, a δ-(hydroxymethyl)-δ-lactone, and a γ-(hydroxymethyl)-γ-lactam in 22-76% yields. The method was used in an attempted synthesis of (+)-asperolide C; (-)-epi-asperolide C was obtained in two steps from (+)-podocarpic acid.

Organic Letters published new progress about Corey-Chaykovsky reaction (Johnson-). 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

Parandeh-Khoozani, Niloufar published the artcileSynthesis of nitroaldols through the Henry reaction using a copper(II)-Schiff base complex anchored on magnetite nanoparticles as a heterogeneous nanocatalyst, SDS of cas: 86-51-1, the main research area is preparation immobilization copper Schiff salicylaldehyde trimethoxysilyl propylamine anchored nanoparticle; thermal decomposition immobilization copper Schiff salicylaldehyde trimethoxysilyl propylamine nanoparticle; nanocatalyst immobilization copper Schiff salicylaldehyde trimethoxysilyl propylamine anchored nanoparticle; nitroaldol preparation Henry reaction.

A Cu(II)-Schiff base complex supported on functionalized Fe3O4 magnetic nanoparticles (MNPs@Salen-Cu(II)) was obtained as a new heterogeneous nanocatalyst. The nanocomposite materials were characterized by vibrating sample magnetometer (VSM), XRD, SEM, energy dispersive X-ray (EDX), FTIR spectroscopy (FTIR), and TGA. The catalyst was used in the Henry reaction to accomplish one-pot synthesis of nitroaldol derivatives in green conditions. This nanocatalyst can be easily separated from media of reaction using an external magnet and reused several times without loss of its catalytic activity. Furthermore, the non-toxicity of the catalysts and the high yield of the products are other advantages of this method.

Journal of Coordination Chemistry published new progress about Energy-dispersive x-ray spectroscopy. 86-51-1 belongs to class isoquinoline, name is 2,3-Dimethoxybenzaldehyde, and the molecular formula is C9H10O3, SDS of cas: 86-51-1.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Yu, Yong-xin published the artcileOdor fingerprinting of Listeria monocytogenes recognized by SPME-GC-MS and E-nose, Related Products of isoquinoline, the main research area is Listeria odor fingerprinting SPME GCMS electronic nose; COVM; E-nose; Listeria monocytogenes; MVOCs; SPME–GC–MS; detection; détection; empreinte odorante; odor fingerprinting.

Microorganisms can produce species-specific microbial volatile organic compounds (MVOCs), or odor compounds, which can be characterized by odor fingerprinting. The objective of this study was to characterize the odor fingerprint of Listeria monocytogenes. Solid-phase microextraction – gas chromatog. – mass spectrometry (SPME-GC-MS) and electronic nose (E-nose) were used to recognize the MVOCs of L.monocytogenes in pure culture medium. The main MVOCs of L.monocytogenes were identified by SPME-GC-MS anal. as alcs., aldehydes, ketones, alkanes, and heterocyclics, among which the relative peak area of one compound, 3-hydroxy-2-butanone, increased along with the growth of L.monocytogenes. The odor fingerprint of L.monocytogenes at different growth stages could be clearly discriminated by E-nose. In addition, E-nose signals had a very good linear relationship with the concentration of this bacterium (R2 = 0.9937). Our study may help to establish the anal. of the odor fingerprint of microorganisms as a potential routine method in microbiol.

Canadian Journal of Microbiology published new progress about Gas chromatography-mass spectrometry. 21834-92-4 belongs to class isoquinoline, name is 5-Methyl-2-phenylhex-2-enal, and the molecular formula is C13H16O, Related Products of isoquinoline.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Domeno, C. published the artcileSampling and analysis of volatile organic pollutants emitted by an industrial stack, Application In Synthesis of 1205-17-0, the main research area is volatile organic pollutant determination industrial stack gas.

The sampling of volatile organic compounds emitted by a process industry was optimized and applied in realistic conditions. Two different fractions were obtained from the emission, one liquid from the condensation of the water vapor which contains the most polar compounds and another fraction of gas, which was trapped on an active carbon filter. Both fractions were analyzed by solid phase microextraction (SPME) with a polyacrylate fiber and then GC-MS. Once the composition of the industrial emission was known, two different systems were studied for reducing the air pollution. The 1st one involves a washing system with water and the 2nd one combines the washing system with a chem. oxidation using NaClO-NaOH. A pilot plant was installed connected to the industrial chimney for the study. Reduction factors of air pollution of 70 and 90%, resp., were found. The anal. results as well as the technol. ones are shown and discussed.

Analytica Chimica Acta published new progress about Gas chromatography-mass spectrometry. 1205-17-0 belongs to class isoquinoline, name is 2-Methyl-3-(3,4-methylenedioxyphenyl)propionaldehyde, and the molecular formula is C11H12O3, Application In Synthesis of 1205-17-0.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Ji, Xiaoming published the artcilePalladium-catalyzed intermolecular C-H silylation initiated by aminopalladation, Recommanded Product: 4-Methoxyphenylacetic acid, the main research area is palladium catalyzed carbon hydrogen bond silylation cyclization phenylacrylamide methyldisilane; dihydropyrroloindolone disilyl preparation; crystal structure disilyl phenyldihydropyrroloindolone; mol structure disilyl phenyldihydropyrroloindolone.

A Pd(II)-catalyzed intermol. C-H silylation reaction initiated by aminopalladation was developed. The C-H bonds were activated by an alkyl Pd(II) species generated through aminopalladation and then disilylated with hexamethyldisilane to form disilylated indolines as the final products. The reaction provides a new method for the introduction of silyl groups into complex organic mols.

Chemical Communications (Cambridge, United Kingdom) published new progress about Addition reaction, aminopalladation. 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

Moreira, Joana published the artcileNew diarylpentanoids and chalcones as potential antimicrobial adjuvants, Computed Properties of 86-51-1, the main research area is diarylpentanoid chalcone docking efflux pump biofilm inhibition antimicrobial adjuvant; Antimicrobial resistance; Biofilm; Chalcones; Diarylpentanoids; Efflux pumps; Quorum-sensing.

Antimicrobial resistance arises due to several adaptation mechanisms, being the overexpression of efflux pumps (EPs) one of the most worrisome. In bacteria, EPs can also play important roles in virulence, quorum-sensing (QS) and biofilm formation. To identify new potential antimicrobial adjuvants, a library of diarylpentanoids I [X = CH2CH2, CH2CH2CH2, CH2OCH2, CH2SCH2; R = 2-BrC6H4, 3-MeOC6H4, 4-F3CC6H4, 2,3-(MeO)2C6H3, etc.] and chalcones II [X = CH2, CH2CH2, SCH2; R = 2-MeOC6H4, 2,4,5-(MeO)3C6H2] was synthesized and tested. These compounds presented encouraging results in potentiating the activity of antimicrobials, with diarylpentanoid I [X = CH2OCH2; R = 2,3-(MeO)2C6H3] being the most promising. The compounds I [X = CH2OCH2; R = 4-BrC6H4, 2,3-(MeO)2C6H3, 3,4-(MeO)2C6H4], I (X = CH2CH2CH2; R = 2-MeOC6H4), II (X = CH2CH2; R = 2-MeOC6H4) and II [X = SCH2; R = 2,4,5-(MeO)3C6H2] displayed EP inhibitory effect, mainly in Staphylococcus aureus 272123. Compounds I [X = CH2OCH2; 2,3-(MeO)2C6H3], I (X = CH2CH2CH2; R = 2-MeOC6H4), II (X = CH2CH2; R = 2-MeOC6H4) and II [X = SCH2; R = 2,4,5-(MeO)3C6H2] exhibited inhibitory effect on biofilm formation in S. aureus 272,123 while I [X = CH2OCH2; R = 2,3-(MeO)2C6H3] and II (X = CH2CH2; R = 2-MeOC6H4) inhibited QS in the pair Sphingomonas paucimobilis Ezf 10-17 and Chromobacterium violaceum CV026. The overall results demonstrated that diarylpentanoid I [X = CH2OCH2; R = 2,3-(MeO)2C6H3] and chalcone II (X = CH2CH2; R = 2-MeOC6H4) were active against all the resistance mechanisms tested, suggesting their potential as antimicrobial adjuvants.

Bioorganic & Medicinal Chemistry Letters published new progress about Aldol condensation, stereoselective. 86-51-1 belongs to class isoquinoline, name is 2,3-Dimethoxybenzaldehyde, and the molecular formula is C9H10O3, Computed Properties of 86-51-1.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Qian, Jianqiang published the artcileDesign and synthesis of benzylidenecyclohexenones as TrxR inhibitors displaying high anticancer activity and inducing ROS, apoptosis, and autophagy, Application of 2,3-Dimethoxybenzaldehyde, the main research area is benzylidenecyclohexenone preparation antitumor apoptosis autophagy thioredoxin reductase inhibitor; trimethoxybenzylidene dihydropyridinone preparation antitumor apoptosis autophagy thioredoxin reductase inhibitor; Antitumor activities; Benzylidenecyclohexenones; Piperlongumine; Reactive oxygen species (ROS); Thioredoxin reductase (TrxR).

Oxidative therapy, a strategy that specifically increases reactive oxygen species (ROS) levels in tumor cells by disrupting the redox homeostasis has gained increasing interest. The antitumor effects of the natural product piperlongumine (PL) appear to result from its ability to increase intracellular ROS levels via inhibition of antioxidative thioredoxin reductase (TrxR). Twenty-seven benzylidenecyclohexenone-based PL analogs (I [R = 3,4,5-trimethoxyphenyl, 1-acetyl-1H-indol-3-yl, 2H-1,3-benzodioxol-5-yl, etc.; R1 = H, I] and II [R2 = H, (benzyloxy)carbonyl, methanesulfonyl, phenylsulfonyl, p-toluenesulfonyl]) were designed, synthesized and evaluated for their pharmacol. properties. Most of the compounds exhibited potent antiproliferative activities against five human cancer cell lines, especially against breast tumor cells. One of the most promising analogs I (R = 4-(trifluoromethoxy)phenyl; R1 = H (III)) showed 12-fold higher inhibitory activity against the thioredoxin reductase (TrxR) than PL and suppressed the expression of TrxR1 protein in breast cancer cells and inhibited TrxR enzymic activity. In addition, III increased ROS levels and resulted in marked apoptosis by regulating apoptosis-related proteins expressed in the breast cancer cells. Compound III also triggered the formation of autophagosomes and autolysosomes by promoting the expression of LC3-II and Beclin-1 and diminishing the expression of LC3-I and p62 proteins. Finally, III displayed low acute toxicity and good inhibitory potency to tumors in mice. Overall, III is a promising anti-breast cancer candidate warranting further investigation.

European Journal of Medicinal Chemistry published new progress about Aldol condensation, stereoselective. 86-51-1 belongs to class isoquinoline, name is 2,3-Dimethoxybenzaldehyde, and the molecular formula is C9H10O3, Application of 2,3-Dimethoxybenzaldehyde.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem