Tag: M.W=150-200

Aswathanarayanappa, Chandrashekar published the artcileSynthesis and biological evaluation of 2,5-diphenyl-1,3,4-oxadiazole and 3,6-diphenyl[1,2,4]triazolo[3,4-b][1,3,4]thiadiazole derivatives, HPLC of Formula: 99585-12-3, the main research area is oxadiazole diphenyl triazolothiadiazole preparation antibacterial antifungal antioxidant.

A new series of 2,5-diphenyl-1,3,4-oxadiazole I (R2 = 2-CH3, 4-Cl,2-CH3; R3 = 2-Br,4-F, 2,3,4-F3, 4-Br,3-CH3, 4-F,3-NO2, 4-Cl,2-CH3) and 3,6-diphenyl[1,2,4]triazolo[3,4-b][1,3,4]thiadiazole derivatives II were synthesized and evaluated for their antimicrobial and antioxidant activity to study the effect of substitution on the Ph ring of benzoic acid on these activities. The I were obtained from acid hydrazide on treatment with different benzoic acid in the presence of phosphorus oxychloride. Cyclo-condensation of the SH and NH2 groups of aminothiol 5 with appropriate benzoic acid derivatives in presence of phosphoryl chloride gave II derivatives The toxicity risk assessment; cLogP, solubility, drug likeness and drug score for these compounds was predicted, compounds I (R2 = 2-CH3; R3 = 2-Br,4-F, 2,3,4-F3, 4-Br,3-CH3) and I (R2 = 4-Cl,2-CH3; R3 = 2-Br,4-F, 2,3,4-F3, 4-Br,3-CH3, 4-F,3-NO2) were assessed as non-toxic, while I (R2 = 2-CH3: R3 = 4-F,3-NO2) indicated irritating effects and I (R2 = 2-CH3; R3 = 4-Cl,2-CH3) medium risk mutagenicity. The II have shown high risk of reproductive effects. The compounds I (R2 = 2-CH3, 4-Cl,2-CH3; R3 = 2,3,4-F3, 4-F,3-NO2); II (R2 = 2-CH3, 4-Cl,2-CH3; R3 = 2,3,4-F, 4-Br,3-CH3, 4-F,3-NO2) and I (R2 = 2-CH3, 4-Cl,2-CH3; R3 = 2-Br,4-F, 2,3,4-F3, 4-F,3-NO2, 4-Cl,2-CH3), II (R2 = 2-CH3, 4-Cl,2-CH3; R3 = 2-Br,4-F, 2,3,4-F3) showed pronounced antibacterial and antifungal activity resp., while II (R2 = 2-CH3; R3 = 2,3,4-F3, 4-Br,3-CH3) exhibited promising antioxidant activity.

Inventi Impact: Med Chem published new progress about Antibacterial agents. 99585-12-3 belongs to class chlorides-buliding-blocks, name is Methyl 4-chloro-2-methylbenzoate, and the molecular formula is C9H9ClO2, HPLC of Formula: 99585-12-3.

Referemce:
Chloride – Wikipedia,
Chlorides – an overview | ScienceDirect Topics

Matador, Esteban published the artcileBifunctional Squaramide Organocatalysts for the Asymmetric Addition of Formaldehyde tert-Butylhydrazone to Simple Aldehydes, Synthetic Route of 286474-59-7, the main research area is bifunctional squaramide organocatalyst asym addition formaldehyde butylhydrazone aldehyde; hydrazones; hydrogen bonds; organocatalysis; solvent effects; squaramides.

The nucleophilic addition of formaldehyde tert-butylhydrazone to simple aldehydes (a formal hetero-carbonyl-ene reaction) can be performed with good reactivity and excellent enantioselectivity by virtue of the dual hydrogen-bonding activation exerted by amide-squaramide organocatalysts. The resulting hydroxydiazenes (azo alcs.) were isolated in high yields as enantiomerically enriched azoxy compounds after a regioselective azo-to-azoxy transformation. Subsequent derivatization provides an entry to relevant amino alcs., oxazolidinones, and derivatives thereof.

Chemistry – A European Journal published new progress about Addition reaction catalysts. 286474-59-7 belongs to class chlorides-buliding-blocks, name is 6-Chloro-2-fluoro-3-methylbenzaldehyde, and the molecular formula is C8H6ClFO, Synthetic Route of 286474-59-7.

Referemce:
Chloride – Wikipedia,
Chlorides – an overview | ScienceDirect Topics

Tian, Miao published the artcileCovalent Organic Frameworks: A Sustainable Photocatalyst toward Visible-Light-Accelerated C3 Arylation and Alkylation of Quinoxalin-2(1H)-ones, HPLC of Formula: 55687-19-9, the main research area is quinoxalinone green arylation alkylation covalent organic framework photocatalyst; alkylation; arylation; covalent organic frameworks; quinoxalin-2(1H)-ones; visible-light-driven.

A practical and scalable protocol for visible-light-accelerated arylation and alkylation of quinoxalin-2(1H)-ones I (R = H; R1 = H, 8-Cl, 6,7-di-Me, 5-Cl, etc.; R2 = H, Me, Bn) with hydrazines RNHNH2 or RNHNH2•X (X = HCl, HOOCCOOH) is reported. In this protocol, a hydrazone-based two-dimensional covalent organic framework (2D-COF-1) was employed as the heterogeneous photocatalyst (PC). Due to its excellent photocatalytic properties, good chem. stability and heterogeneous nature, the present method exhibits high efficiency, good functional group tolerance, easy scalability and remarkable catalyst reusability. More importantly, it provides an alternative way that allows rapid access to various C3 arylated or alkylated quinoxalin-2(1H)-ones I (R = Ph, Et, cyclopentyl, etc.) in a greener and sustainable manner.

Chemistry – A European Journal published new progress about Alkylation, regioselective. 55687-19-9 belongs to class chlorides-buliding-blocks, name is 5-Chloroquinoxalin-2-ol, and the molecular formula is C8H5ClN2O, HPLC of Formula: 55687-19-9.

Referemce:
Chloride – Wikipedia,
Chlorides – an overview | ScienceDirect Topics

Kato, Yusuke published the artcileStructural basis for potent inhibition of D-amino acid oxidase by thiophene carboxylic acids, Category: chlorides-buliding-blocks, the main research area is thiophene carboxylate inhibitor amino acid oxidase DAO crystal structure; Drug discovery; Flavoenzyme; Molecular dynamics; Schizophrenia; X-ray crystallography.

A series of thiophene-2-carboxylic acids and thiophene-3-carboxylic acids were identified as a new class of DAO inhibitors. Structure-activity relationship (SAR) studies revealed that small substituents are well-tolerated on the thiophene ring of both the 2-carboxylic acid and 3-carboxylic acid scaffolds. Crystal structures of human DAO in complex with potent thiophene carboxylic acids revealed that Tyr224 was tightly stacked with the thiophene ring of the inhibitors, resulting in the disappearance of the secondary pocket observed with other DAO inhibitors. Mol. dynamics simulations of the complex revealed that Tyr224 preferred the stacked conformation irresp. of whether Tyr224 was stacked or not in the initial state of the simulations. MM/GBSA indicated a substantial hydrophobic interaction between Tyr244 and the thiophene-based inhibitor. In addition, the active site was tightly closed with an extensive network of hydrogen bonds including those from Tyr224 in the stacked conformation. The introduction of a large branched side chain to the thiophene ring markedly decreased potency. These results are in marked contrast to other DAO inhibitors that can gain potency with a branched side chain extending to the secondary pocket due to Tyr224 repositioning. These insights should be of particular importance in future efforts to optimize DAO inhibitors with novel scaffolds.

European Journal of Medicinal Chemistry published new progress about Conformational transition. 74598-03-1 belongs to class chlorides-buliding-blocks, name is 5-Chloro-4-methylthiophene carboxylic acid, and the molecular formula is C6H5ClO2S, Category: chlorides-buliding-blocks.

Referemce:
Chloride – Wikipedia,
Chlorides – an overview | ScienceDirect Topics

Chen, Peng-Fei published the artcileBronsted Acid Catalyzed Dearomatization by Intramolecular Hydroalkoxylation/Claisen Rearrangement: Diastereo- and Enantioselective Synthesis of Spirolactams, Related Products of chlorides-buliding-blocks, the main research area is spirolactam enantioselective diastereoselective preparation atom economy kinetic resolution; ynamide dearomatization intramol hydroalkoxylation Claisen rearrangement Bronsted acid catalyst; Brønsted acids; alkynes; cyclizations; heterocycles; kinetic resolution.

A novel Bronsted acid catalyzed intramol. hydroalkoxylation/Claisen rearrangement, allowing practical and atom-economic synthesis of a range of valuable spirolactams such as I [R1 = Ph, 4-MeC6H4, 4-F3CC6H4, etc.; R2 = Ph, 2-BrC6H4, 4-MeOC6H4, etc.; R3 = H, 8-F, 7-MeO, etc.; R4 = Ts, SO2Ph, Bs, etc.] from readily available ynamides in generally good to excellent yields with excellent diastereoselectivities and broad substrate scope was described. Importantly, an unexpected dearomatization of nonactivated arenes and heteroaromatic compounds was involved in this tandem sequence. Moreover, an asym. version of this tandem cyclization was also achieved by efficient kinetic resolution by chiral phosphoric acid catalysis. In addition, [3,3]-rearrangement was shown to be kinetically preferred over related [1,3]-rearrangement by theor. calculations

Angewandte Chemie, International Edition published new progress about [3,3]-Sigmatropic rearrangement. 99585-12-3 belongs to class chlorides-buliding-blocks, name is Methyl 4-chloro-2-methylbenzoate, and the molecular formula is C9H9ClO2, Related Products of chlorides-buliding-blocks.

Referemce:
Chloride – Wikipedia,
Chlorides – an overview | ScienceDirect Topics

Kurata, Haruto published the artcileDiscovery of a 1-Methyl-3,4-dihydronaphthalene-Based Sphingosine-1-Phosphate (S1P) Receptor Agonist Ceralifimod (ONO-4641). A S1P1 and S1P5 Selective Agonist for the Treatment of Autoimmune Diseases, COA of Formula: C9H9ClO2, the main research area is sphingosinephosphate receptor agonist ceralifimod immunomodulator autoimmune disease.

The discovery of 1-({6-[(2-methoxy-4-propylbenzyl)oxy]-1-methyl-3,4-dihydronaphthalen-2-yl}methyl)azetidine3-carboxylic acid (I) (13n, ceralifimod, ONO-4641), a sphingosine-1-phosphate (S1P) receptor agonist selective for S1P1 and S1P5, is described. While it has been revealed that the modulation of the S1P1 receptor is an effective way to treat autoimmune diseases such as relapsing-remitting multiple sclerosis (RRMS), it was also reported that activation of the S1P3 receptor is implicated in some undesirable effects. The authors carried out a structure-activity relationship (SAR) study of hit compound 6 with an amino acid moiety in the hydrophilic head region. Following identification of a lead compound with a dihydronaphthalene central core by inducing conformational constraint, optimization of the lipophilic tail region led to the discovery of I as a clin. candidate that exhibited >30 000-fold selectivity for S1P1 over S1P3 and was potent in a peripheral lymphocyte lowering (PLL) test in mice (ED50 = 0.029 mg/kg, 24 h after oral dosing).

Journal of Medicinal Chemistry published new progress about Anti-multiple sclerosis agents. 99585-12-3 belongs to class chlorides-buliding-blocks, name is Methyl 4-chloro-2-methylbenzoate, and the molecular formula is C9H9ClO2, COA of Formula: C9H9ClO2.

Referemce:
Chloride – Wikipedia,
Chlorides – an overview | ScienceDirect Topics

Pieroni, Marco published the artcileSynthesis, Biological Evaluation, and Structure-Activity Relationships for 5-[(E)-2-Arylethenyl]-3-isoxazolecarboxylic Acid Alkyl Ester Derivatives as Valuable Antitubercular Chemotypes, Category: chlorides-buliding-blocks, the main research area is arylethenylisoxazolecarboxylic acid stereoselective preparation tuberculosis antituberculosis structure activity; bromomethylisoxazole triphenylphosphine aldehyde Wittig olefination.

Tuberculosis (TB), mostly caused by Mycobacterium tuberculosis (Mtb), is one of the leading causes of death from infectious disease worldwide. Its coinfection with HIV and the emergence of multidrug-resistant TB (MDR-TB) and extensively drug-resistant TB (XDR-TB) strains have further worsened the TB pandemic. Despite its global impact, TB is considered a neglected disease and no new anti-TB therapeutics have been introduced over the last four decades. The nonreplicating persistent form of TB (NRP-TB) is responsible for the length of the treatment and is the putative cause of treatment failure. Therefore, new anti-TB agents, which are active against both the replicating form of Mtb (R-TB) and NRP-TB, are urgently needed. The synthesis and structure-activity relationships (SAR) of a series of 5-[(E)-2-arylethenyl]-3-isoxazolecarboxylic acid alkyl esters e.g. I, as potent anti-TB agents are reported. Several compounds had submicromolar min. inhibitory concentrations (MIC) against R-TB and were active against NRP-TB in the low micromolar range, thus representing attractive lead compounds for the possible development of new anti-TB agents.

Journal of Medicinal Chemistry published new progress about Aldehydes Role: RCT (Reactant), RACT (Reactant or Reagent). 286474-59-7 belongs to class chlorides-buliding-blocks, name is 6-Chloro-2-fluoro-3-methylbenzaldehyde, and the molecular formula is C8H6ClFO, Category: chlorides-buliding-blocks.

Referemce:
Chloride – Wikipedia,
Chlorides – an overview | ScienceDirect Topics

Wales, Steven M. published the artcileBenzoazepine-Fused Isoindolines via Intramolecular (3 + 2)-Cycloadditions of Azomethine Ylides with Dinitroarenes, HPLC of Formula: 1214344-25-8, the main research area is benzazepine fused isoindoline diastereoselective preparation; nitrobenzylaminobenzaldehyde glycine cycloaddition.

Aminobenzaldehydes bearing a pendant 3,5-dinitrophenyl group react thermally with N-substituted α-amino acids to form unprecedented benzazepine-fused isoindolines, e.g., I. The reaction proceeds via a dearomatization/rearomatization sequence involving an intramol. [3 + 2]-cycloaddition between the in situ formed azomethine ylide and the dinitroarene. Various glycine derivatives are tolerated as well as branched substrates based on cyclic, α-mono-, and α,α-disubstituted amino acids, giving single diastereomers in many cases. The method is scalable and gives products with a nitro group ready for further manipulation.

Organic Letters published new progress about [3+2] Cycloaddition reaction (intramol.). 1214344-25-8 belongs to class chlorides-buliding-blocks, name is 1-(Chloromethyl)-3-fluoro-5-nitrobenzene, and the molecular formula is C7H5ClFNO2, HPLC of Formula: 1214344-25-8.

Referemce:
Chloride – Wikipedia,
Chlorides – an overview | ScienceDirect Topics

Ruan, Jiwu published the artcileDirect Synthesis of 1-Indanones via Pd-Catalyzed Olefination and Ethylene Glycol-Promoted Aldol-Type Annulation Cascade, COA of Formula: C8H6ClFO, the main research area is indanone preparation reaction mechanism; arylhalide butylvinylether olefination palladium catalyst; aldol annulation ethylene glycol promoter.

A wide range of multisubstituted 1-indanones, e.g., I of potential pharmaceutical use were synthesized in a one-pot fashion in moderate to excellent yields via palladium catalysis in ethylene glycol. The Heck reaction first installs an enol functionality on the aromatic ring; this is followed by an ethylene glycol promoted aldol-type annulation with a neighboring carbonyl group, resulting in the formation of various 1-indanones.

Organic Letters published new progress about Alkyl vinyl ethers Role: RCT (Reactant), RACT (Reactant or Reagent). 286474-59-7 belongs to class chlorides-buliding-blocks, name is 6-Chloro-2-fluoro-3-methylbenzaldehyde, and the molecular formula is C8H6ClFO, COA of Formula: C8H6ClFO.

Referemce:
Chloride – Wikipedia,
Chlorides – an overview | ScienceDirect Topics

Kar, S. published the artcileQSAR with quantum topological molecular similarity indices: toxicity of aromatic aldehydes to Tetrahymena pyriformis, Application In Synthesis of 286474-59-7, the main research area is aromatic aldehyde toxicity Tetrahymena pyriformis QSAR quantum topol mol; QTMS descriptors aromatic aldehyde toxicity Tetrahymena pyriformis; QSPR aromatic aldehyde toxicity Tetrahymena pyriformis; genetic partial least square model predictive capacity toxicity Tetrahymena; lipid water partition coefficient predictor variable toxicity Tetrahymena pyriformis.

Extensive production and use of aromatic aldehydes and their derivatives without proper certification is alarming with regard to environmental safety. This concern motivated the construction of predictive quant. structure-activity relation (QSAR) models for the toxicity of aldehydes to the ecol. important species Tetrahymena pyriformis. Quantum topol. mol. similarity (QTMS) descriptors, along with the lipid-H2O partition coefficient (log Ko/w), were used as predictor variables. The QTMS descriptors were calculated at different levels of theory including AM1, HF/3-21G(d), HF/6-31G(d), B3LYP/6-31 + G(d,p), B3LYP/6-311 + G(2d,p) and MP2/6-311+G(2d,p). The data set of 77 aromatic aldehydes was divided into a training set (n = 58) and a test (n = 19) set, and 58 models were developed using partial least squares (PLS) and genetic partial least squares (G/PLS). The authors evaluated the overall predictive capacity of the models based on leave-one-out predictions for the training set compounds and model derived predictions for the test set compounds For both PLS and G/PLS, the models built at the HF/6-31G(d) level show better predictivity (based on overall prediction) than the models developed at any of the other 5 levels. Further validation was also performed using (process and model) randomization tests. Improved predictive QSAR models for aldehydic toxicity to Tetrahymena pyriformis can be generated using QTMS descriptors along with log Ko/w.

SAR and QSAR in Environmental Research published new progress about AM1 (molecular orbital method) (calculations of QTMS descriptors). 286474-59-7 belongs to class chlorides-buliding-blocks, name is 6-Chloro-2-fluoro-3-methylbenzaldehyde, and the molecular formula is C8H6ClFO, Application In Synthesis of 286474-59-7.

Referemce:
Chloride – Wikipedia,
Chlorides – an overview | ScienceDirect Topics