Month: November 2022

Shen, Chaoren published the artcilePalladium-Catalyzed Carbonylative Four-Component Synthesis of Thiochromenones: The Advantages of a Reagent Capsule, Safety of 4-Chloro-2-fluoroiodobenzene, the main research area is four component reaction fluoroiodobenzene phenylacetylene carbonylative palladium catalyst; thiochromenone preparation; carbonylation; multicomponent reactions; palladium catalysis; thiochromenones.

Multicomponent reactions, especially those involving four or even more reagents, have been a long-standing challenge because of the issues associated with balancing reactivity, selectivity, and compatibility. Herein, we demonstrate how the use of a reagent capsule provides straightforward access to synthetically valuable thiochromenone derivatives by a palladium-catalyzed carbonylative four-component reaction. To the best of our knowledge, this is the first example of applying a capsule to prevent catalyst poisoning and undesired side reactions of the multicomponent reaction.

Angewandte Chemie, International Edition published new progress about Alkynes, aryl Role: RCT (Reactant), RACT (Reactant or Reagent). 6797-79-1 belongs to class chlorides-buliding-blocks, name is 4-Chloro-2-fluoroiodobenzene, and the molecular formula is C6H3ClFI, Safety of 4-Chloro-2-fluoroiodobenzene.

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

Gautam, Prashant published the artcileAminophosphine Palladium Pincer-Catalyzed Carbonylative Sonogashira and Suzuki-Miyaura Cross-Coupling with High Catalytic Turnovers, Application of 4-Chloro-2-fluoroiodobenzene, the main research area is aryl alkynone ketone preparation; palladium pincer complex catalyst carbonylative Sonogashira Suzuki coupling; iodoarene palladium catalyzed carbonylation Sonogashira Suzuki coupling; kinetics palladium pincer complex catalyzed Sonogashira Suzuki coupling.

In the presence of palladium pincer complex I, aryl iodides underwent carbonylative Sonogashira and Suzuki coupling reactions with aryl alkynes and cyclopropylacetylene and arylboronic acids mediated by K2CO3 in propylene carbonate to yield aryl alkynones and diaryl ketones, resp. Using I, the carbonylative Sonogashira and Suzuki coupling reactions were carried out at 10-4 mol% and 10-6 mol%, resp. Palladium nanoparticles generated from I were characterized.

ACS Omega published new progress about Alkynes, aryl Role: RCT (Reactant), RACT (Reactant or Reagent). 6797-79-1 belongs to class chlorides-buliding-blocks, name is 4-Chloro-2-fluoroiodobenzene, and the molecular formula is C6H3ClFI, Application of 4-Chloro-2-fluoroiodobenzene.

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

Aboo, Ahmed H. published the artcileMethanol as hydrogen source: transfer hydrogenation of aromatic aldehydes with a rhodacycle, Category: chlorides-buliding-blocks, the main research area is transfer hydrogenation aromatic aldehyde rhodacycle methanol hydrogen source.

A cyclometalated rhodium complex has been shown to perform highly selective and efficient reduction of aldehydes, deriving the hydrogen from methanol. With methanol as both the solvent and hydrogen donor under mild conditions and an open atm., a wide range of aromatic aldehydes were reduced to the corresponding alcs., without affecting other functional groups.

Chemical Communications (Cambridge, United Kingdom) published new progress about Alcohols Role: SPN (Synthetic Preparation), PREP (Preparation). 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

Szlachcic, Pawel published the artcileFacile and Regioselective Synthesis of Substituted 1H-Pyrazolo[3,4-b]quinolines from 2-Fluorobenzaldehydes and 1H-Pyrazol-5-amines, Synthetic Route of 93118-03-7, the main research area is pyrazoloquinoline preparation; fluorobenzaldehyde pyrazolamine regioselective condensation.

The present article concerns the scope and limitations of the regioselective condensation of 2-fluorobenzaldehydes with 1H-pyrazol-5-amines, leading to the synthesis of substituted 1H-pyrazolo[3,4-b]quinolines (PQ), in the presence of a base catalyst (DABCO and 2,4,6-trimethylpyridine). A method to obtain these nitrogen heterocycles with fluorine or trifluoromethyl substituents in different positions in the carbocyclic ring was developed as a part of a systematic research on the influence of fluorine-containing substituents on the parameters of PQ. Those compounds, characterized by high-fluorescence intensity, have been tested as emitters for the organic light-emitting diodes since 1997. The functionalization of PQ causes changes in various parameters, for example, HOMO and LUMO levels, which are important for the adjustment of fabricated organic light-emitting diodes. One of the easiest methods of PQ preparation, namely, the condensation of substituted anilines with 5-chloro-1H-pyrazole-4-carbaldehydes, is not regioselective. The method described in this study allows synthesizing of 1H-pyrazolo[3,4-b]quinolines with good yields and high selectivity-only the expected isomer is obtained. As various different 2-fluorobenzaldehydes are com. available, and 1H-pyrazol-5-amines with different substituents are easy to prepare, the method could be a good alternative to the already known procedures. All possible mechanisms of the reaction were also thoroughly studied.

Journal of Heterocyclic Chemistry published new progress about Aryl aldehydes Role: RCT (Reactant), RACT (Reactant or Reagent). 93118-03-7 belongs to class chlorides-buliding-blocks, name is 2-Chloro-3-(trifluoromethyl)benzaldehyde, and the molecular formula is C8H4ClF3O, Synthetic Route of 93118-03-7.

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

Surasani, Rajendra published the artcileFeF3 as a novel catalyst for the synthesis of polyhydroquinoline derivatives via unsymmetrical Hantzsch reaction, Synthetic Route of 93118-03-7, the main research area is hydroquinoline poly preparation Hantzsch condensation iron fluoride catalyst; aldehyde diketone dimedone 4 component condensation iron fluoride catalyst; ferric fluoride catalyst polyhydroquinoline preparation 1 pot Hantzsch condensation.

A facile and highly efficient one-pot synthesis of polyhydroquinoline derivatives is reported via four-component condensation reaction of aldehydes, β-keto compounds, active methylene compounds and ammonium acetate in the presence of FeF3 as a catalyst in ethanol at 75-80 °C. The method offers several advantages including high yields, short reaction time, simple work-up procedure and catalyst reusability for several runs. The higher catalytic activity of FeF3 ascribed due to its high acidity, thermal stability and water tolerance. The superiority of use of FeF3 to the current process is compared with other Lewis acids, Fe-salts, fluoride sources and insights of the origin of the efficiency are discussed.

Journal of Fluorine Chemistry published new progress about Aryl aldehydes Role: RCT (Reactant), RACT (Reactant or Reagent). 93118-03-7 belongs to class chlorides-buliding-blocks, name is 2-Chloro-3-(trifluoromethyl)benzaldehyde, and the molecular formula is C8H4ClF3O, Synthetic Route of 93118-03-7.

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

Elkamhawy, Ahmed published the artcileOptimization study towards more potent thiazolidine-2,4-dione IKK-β modulator: Synthesis, biological evaluation and in silico docking simulation, Application of 4-(4-Chlorophenoxy)benzaldehyde, the main research area is arylidene methylpiperazinylbutoxyphenyl thiazolidinedione diastereoselective preparation IKK inhibition SAR docking; IKK-β modulator; Molecular docking; NF-κB signaling pathway; Thiazolidine-2,4-dione.

A novel class of thiazolidine-2,4-diones I [R1 = 3-imidazol-1-ylphenyl, 5-phenylthiophen-2-yl, 4-chlorophenoxyphenyl, etc.] as structurally novel modulators for IKK-β was identified. A hit optimization study via analog synthesis strategy aiming to acquire more potent derivatives, probe the structure activity relationship (SAR) and get reasonable explanations for the elicited IKK-β inhibitory activities though an in-silico docking simulation study was reported. Accordingly, a new series of eighteen thiazolidine-2,4-dione derivatives was rationally synthesized, identified with different spectroscopic techniques and biol. evaluated as noteworthy IKK-β potential modulators. Successfully, new IKK-β potent modulators were obtained, including the most potent analog up-to-date I [R1 = 4-chlorophenoxyphenyl] with IC50 value of 260 nM. A detailed structure activity relationship (SAR) was discussed and a mechanistic study for I [R1 = 4-chlorophenoxyphenyl] was carried out indicating its irreversible inhibition mode with IKK-β (Kinact value = 0.01 (min-1)). Furthermore, the conducted in-silico simulation study provided new insights for the binding modes of this novel class of modulators with IKK-β.

Bioorganic Chemistry published new progress about Aryl aldehydes Role: RCT (Reactant), RACT (Reactant or Reagent). 61343-99-5 belongs to class chlorides-buliding-blocks, name is 4-(4-Chlorophenoxy)benzaldehyde, and the molecular formula is C13H9ClO2, Application of 4-(4-Chlorophenoxy)benzaldehyde.

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

Xu, Weici published the artcileRestricted Conformation of a Hydrogen Bond Mediated Catalyst Enables the Highly Efficient Enantioselective Construction of an All-Carbon Quaternary Stereocenter, COA of Formula: C7H3ClFNO4, the main research area is all carbon quaternary stereocenter enantioselective Friedel Crafts indole.

A highly active catalyst for the enantioselective Friedel-Crafts alkylation of indoles with β,β-disubstituted nitroalkenes is reported, allowing catalyst loadings down to 0.05 mol % for this challenging transformation, providing useful synthetic building blocks with an all-carbon quaternary stereocenter. The catalyst is based on a bis-cyclometalated iridium(III) complex as a structural template, and through the ligand sphere it forms hydrogen bonds with the two substrates. Starting from a previous design, the catalyst was rendered C2-sym. in order to maximize the atom economy of this catalyst scaffold (two catalytic centers per iridium complex), and, most importantly, rational design was applied to restrict the conformational freedom of a key hydrogen bond acceptor, being responsible for activating the indole nucleophile and bringing it in an ideal position for the presumed ternary transition state.

ACS Catalysis published new progress about Alkenes, nitro Role: RCT (Reactant), RACT (Reactant or Reagent). 35112-05-1 belongs to class chlorides-buliding-blocks, name is 4-Chloro-2-fluoro-5-nitrobenzoic acid, and the molecular formula is C7H3ClFNO4, COA of Formula: C7H3ClFNO4.

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

Madaiah, Malavalli published the artcileSynthesis and evaluation of 3-[(2,4-dioxo-1,3,8-triazaspiro[4.6]undec-3-yl)methyl]benzonitrile derivatives as potential anticonvulsants, Application of 4-Fluoro-2-methylbenzene-1-sulfonyl chloride, the main research area is oxotriazaspiroundecylmethylbenzonitrile preparation anticonvulsant.

New 3-[(2,4-dioxo-1,3,8-triazaspiro[4.6]undec-3-yl)methyl]benzonitrile derivatives were synthesized and their pharmacol. activities were determined with the objective to better understand their structure-activity relationship (SAR) for anticonvulsant activity. All the compounds were evaluated for their possible anticonvulsant activity by maximal electroshock seizure (MES) and pentylenetetrazole (PTZ) test. Four compounds showed significant and protective effect on seizure, when compared with the standard drug valproate. The same compounds were found to exhibit advanced anticonvulsant activity as well as lower neurotoxicity than the reference drug. From this study, it is quite apparent that there are at least three parameters for the activity of anticonvulsant drugs, i.e., a lipophilic domain, a hydrophobic center, and a two-electron donor. © 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Archiv der Pharmazie (Weinheim, Germany) published new progress about Acid chlorides Role: RCT (Reactant), RACT (Reactant or Reagent). 7079-48-3 belongs to class chlorides-buliding-blocks, name is 4-Fluoro-2-methylbenzene-1-sulfonyl chloride, and the molecular formula is C7H6ClFO2S, Application of 4-Fluoro-2-methylbenzene-1-sulfonyl chloride.

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

Tsvelikhovsky, Dmitry published the artcileConcise Palladium-Catalyzed Synthesis of Dibenzodiazepines and Structural Analogues, COA of Formula: C7H3BrClF3O, the main research area is dibenzodiazepine dibenzooxazepine preparation palladium copper catalyzed cross coupling; aniline dihaloarene reactant palladium catalyzed coupling diarylamine preparation; diarylamine reactant palladium catalyzed cross coupling dibenzodiazepine preparation; phenol dihaloarene reactant palladium catalyzed coupling diarylether preparation; diarylether reactant palladium catalyzed cross coupling dibenzodiazepine preparation.

A general and highly efficient protocol for the synthesis of dibenzodiazepines and their structural analogs is reported. In the presence of catalytic quantities of palladium, readily accessible precursors are cross-coupled with ammonia and then spontaneously undergo an intramol. condensation to form the corresponding dibenzodiazepines, e.g. I, in one step. This new strategy is applicable to the construction of a wide variety of dibenzooxazepines, e.g. II, and other structurally related heterocycles, e.g. III.

Journal of the American Chemical Society published new progress about Aromatic amines Role: RCT (Reactant), RACT (Reactant or Reagent). 468075-00-5 belongs to class chlorides-buliding-blocks, name is 2-Bromo-1-chloro-4-(trifluoromethoxy)benzene, and the molecular formula is C7H3BrClF3O, COA of Formula: C7H3BrClF3O.

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

Dey, Aniruddha published the artcileNickel-catalyzed deamidative step-down reduction of amides to aromatic hydrocarbons, Quality Control of 36428-96-3, the main research area is reduction diamidation aromatic amide hydrocarbon preparation nickel catalyst; aryl pyrazolyl azaindolyl ketone amide reduction tetramethyldisiloxane nickel catalyst; crystal structure ethyldiphenylphosphine dicarbonyl pyrazolyl naphthalenecarboxylate nickel complex; mol structure ethyldiphenylphosphine dicarbonyl pyrazolyl naphthalenecarboxylate nickel complex.

To date, cleavage of the C-N bond in aromatic amides has been achieved in mols. with a distorted constitutional framework around the nitrogen atom. In this report, a nickel-catalyzed reduction of planar aromatic amides to the corresponding lower aromatic hydrocarbon homolog has been reported. Tetramethyldisiloxane reduction of aromatic amides ArCOPz, ArCOAInd (Pz = 1-pyrazolyl, AInd = 7-aza-1-indolyl), catalyzed by Ni(cod)2/EtPPh2 gave the corresponding hydrocarbons ArH (Ar = 1-naphthyl, 2-naphthyl, 9-anthracenyl, 2-pyrenyl) with high yields. This involves a one-pot reductive cleavage of the C-N bond followed by a tandem C-CO bond break in the presence of a hydride source. Substrate scope circumscribes deamidation examples which proceed via oxidative addition of nickel in the amide bonds of nontwisted amides. Mechanistic studies involving isolation and characterization of involved intermediates via different spectroscopic techniques reveal a deeper introspection into the plausible catalytic cycle for the methodol.

ACS Catalysis published new progress about Aromatic amides Role: RCT (Reactant), RACT (Reactant or Reagent). 36428-96-3 belongs to class chlorides-buliding-blocks, name is Pyrene-2-carboxylic acid, and the molecular formula is C17H10O2, Quality Control of 36428-96-3.

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