Category: amides-buliding-blocks

You, Ge-Yun published the artcileSimple chiral sulfinyl imine-thioether ligands for Pd-catalyzed allylic alkylation, Quality Control of 343338-28-3, the main research area is chiral sulfnyl imine thioether ligand preparation; diester biphenyl allylacetate palladium sulfnyl iminethioether catalyst allylic alkylation; biphenyl allyl ester enantioselective preparation.

A set of chiral sulfinyl imine-thioether ligands were prepared via dehydration condensation of substituted benzaldehyde and chiral sulfinamide. The activity of these ligands in Pd-catalyzed asym. allylic alkylation reaction was studied, and the results indicate that the structure of sulfinamide motifs has an obvious effect on the e.r. value and yield. The chiral p-tolylsulfinamide derived ligands can promote the reaction efficiently, while the ligands with tert-Bu group fail to catalyze the reaction. Then, the substrate scope was also investigated under the optimal reaction conditions.

Chemical Papers published new progress about Allylic alkylation catalysts, stereoselective. 343338-28-3 belongs to class amides-buliding-blocks, name is (S)-2-Methylpropane-2-sulfinamide, and the molecular formula is C4H11NOS, Quality Control of 343338-28-3.

Referemce:
Amide – Wikipedia,
Amide – an overview | ScienceDirect Topics

Han, Jie published the artcileDesign and Synthesis of WJ-Phos, and Application in Cu-Catalyzed Enantioselective Boroacylation of 1,1-Disubstituted Allenes, Synthetic Route of 343338-28-3, the main research area is ferrocene chiral sulfinamide phosphine enantioselective catalyst boroacylation allene; crystal structure mol ferrocene chiral sulfinamide phosphine preparation ligand.

The highly enantioselective copper-catalyzed three-component boroacylation of 1,1-disubstituted allenes is reported by using a class of chiral ligands (WJ-Phos), delivering various functionalized organoboron compounds bearing an all-carbon stereocenter in moderate to good yields with high enantioselectivities. WJ-Phos is a ferrocene-derived chiral sulfinamide phosphine ligand and can be easily synthesized in gram-scale from readily available starting materials in short steps. The salient features of this reaction include moderate to good yields, high enantioselectivities, gram-scale synthesis, diverse synthetic transformations, and the development of a new chiral ligand.

ACS Catalysis published new progress about Acylation (boroacylation, stereoselective). 343338-28-3 belongs to class amides-buliding-blocks, name is (S)-2-Methylpropane-2-sulfinamide, and the molecular formula is C4H11NOS, Synthetic Route of 343338-28-3.

Referemce:
Amide – Wikipedia,
Amide – an overview | ScienceDirect Topics

Gao, Xiaoyi published the artcileA novel solid-liquid ‘phase controllable’ biphasic amine absorbent for CO2 capture, COA of Formula: C2H5NO, the main research area is solid liquid phase controllable biphasic amine absorbent; carbon dioxide capture.

The main issues in the application of biphasic amine absorbent include the inconvenient separation of the liquid-liquid biphase and the clogging that is associated with the solid-liquid mixture A novel solid-liquid ‘phase controllable’ biphasic amine absorbent was therefore developed, in which the phase separation occurred only when the absorbent was near saturation The absorbent, composed of triethylene tetramine (TETA), 2-amino-2-methyl-1-propanol (AMP), and N-methylformamide (NMF), turned into solid-liquid biphase under CO2 loading of 0.85 mol mol-1, which is close to saturation (0.92 mol mol-1). The solid phase comprised white powder that accounted for only 42% of the total volume while absorbing 91% of the total load. Turbidity and particle size tests showed that the phase separation was self-aggregating. The mechanisms of absorption and regulation were obtained using 13C NMR and mol. simulation. During the absorption, CO2 first combined with TETA to generate TETAH+CO-2/TETACO-2 through the zwitterion mechanism, and then combined with AMP to generate AMPCO-2 because of the lower reaction activity between CO2 and AMP. The TETA-carbamate was found to greatly weakened the strength of the hydrogen bonds and the van der Waals forces between AMPH+ and AMPCO-2, increasing the solubility of the intermediate products, and therefore achieved the purpose of controlling the phases separation inherent in the reaction.

Chemical Engineering Journal (Amsterdam, Netherlands) published new progress about Absorbents (solid-liquid biphasic, amine). 123-39-7 belongs to class amides-buliding-blocks, name is N-Methylformamide, and the molecular formula is C2H5NO, COA of Formula: C2H5NO.

Referemce:
Amide – Wikipedia,
Amide – an overview | ScienceDirect Topics

Flores-Holguin, Norma published the artcileConceptual DFT-Based Computational Peptidology, Pharmacokinetics Study and ADMET Report of the Veraguamides A-G Family of Marine Natural Drugs, Application of N-Methylformamide, the main research area is veraguamide natural drug density functional theory pharmacokinetics computational peptidol; ADMET; KID (Koopmans In DFT); Veraguamides A–G; computational peptidology; computational pharmacokinetics; conceptual DFT.

As a continuation of our research on the chem. reactivity, pharmacokinetics and ADMET properties of cyclopeptides of marine origin with potential therapeutic abilities, in this work our already presented integrated mol. modeling protocol has been used for the study of the chem. reactivity and bioactivity properties of the Veraguamides A-G family of marine natural drugs. This protocol results from the estimation of the conceptual d. functional theory (CDFT) chem. reactivity descriptors together with several chemoinformatics tools commonly considered within the process of development of new therapeutic drugs. CP-CDFT is a branch of computational chem. and mol. modeling dedicated to the study of peptides, and it is a protocol that allows the estimation with great accuracy of the CDFT-based reactivity descriptors and the associated phys. and chem. properties, which can aid in determining the ability of the studied peptides to behave as potential useful drugs. Moreover, the superiority of the MN12SX d. functional over other long-range corrected d. functionals for the prediction of chem. and phys. properties in the presence of water as the solvent is clearly demonstrated. The research was supplemented with an investigation of the bioactivity of the mol. systems and their ADMET (absorption, distribution, metabolism, excretion, and toxicity) parameters, as is customary in medicinal chem. Some instances of the CDFT-based chem. reactivity descriptors’ capacity to predict the pKas of peptides as well as their potential as AGE inhibitors are also shown.

Marine Drugs published new progress about Advanced glycation end product inhibitors. 123-39-7 belongs to class amides-buliding-blocks, name is N-Methylformamide, and the molecular formula is C2H5NO, Application of N-Methylformamide.

Referemce:
Amide – Wikipedia,
Amide – an overview | ScienceDirect Topics

Lahosa, Alejandro published the artcileEnantiodivergent Approach to the Synthesis of Cis-2,6-Disubstituted Piperidin-4-ones, Recommanded Product: (S)-2-Methylpropane-2-sulfinamide, the main research area is aldehyde tert butanesulfinyl imine keto acid diastereoselective decarboxylative Mannich; amino ketone stereoselective preparation; disubstituted piperidinone stereoselective preparation; alkaloid 241D preparation; epimyrtine preparation; lasubine II preparation.

Enantiopure β-amino ketone derivatives were synthesized by decarboxylative Mannich reaction of chiral N-tert-butanesulfinyl imines with β-keto acids and were subsequently transformed into cis-2,6-disubstituted piperidin-4-ones through an organocatalyzed condensation with aldehydes. Both enantiomers were accessible from the same precursors by inverting the order in the reaction sequence of the aldehydes involved in the imine formation and the intramol. Mannich condensation. The synthesis of the piperidine alkaloids (+)-241D, (-)-epimyrtine, and (-)-lasubine II demonstrated the utility of this methodol.

Journal of Organic Chemistry published new progress about Aldehydes Role: RCT (Reactant), RACT (Reactant or Reagent). 343338-28-3 belongs to class amides-buliding-blocks, name is (S)-2-Methylpropane-2-sulfinamide, and the molecular formula is C4H11NOS, Recommanded Product: (S)-2-Methylpropane-2-sulfinamide.

Referemce:
Amide – Wikipedia,
Amide – an overview | ScienceDirect Topics

Krishna, Anugam V. published the artcileThe seven-step, one-pot regioselective synthesis of biologically important 3-aryllawsones: scope and applications, Related Products of amides-buliding-blocks, the main research area is aryllawsone Hooker oxidation; hydroxy aryl methylnaphthalenedione regioselective preparation; thiophenol aryllawsonetriflate thia Michael reaction; phenylthio arylnaphthalenedione regioselective preparation; aryllawsonetriflate reductive detriflation reaction; arylnaphthalenedione preparation.

Various 3-aryllawsones were synthesized with high regioselectivity from simple lawsone and aldehydes in a seven-step double-cascade one-pot reaction through the combination of organocatalytic Ramachary reductive coupling and Hooker oxidation reactions. The com. availability of the starting materials, diverse substrate scope, possibility of a one- or two-pot approach, regioselectivity of alkyl transfer (with mechanistic proof provided via X-ray crystal structure anal.), and numerous medicinal applications of 3-aryllawsones were the key attractions of this work.

Organic & Biomolecular Chemistry published new progress about Aldehydes Role: RCT (Reactant), RACT (Reactant or Reagent). 343338-28-3 belongs to class amides-buliding-blocks, name is (S)-2-Methylpropane-2-sulfinamide, and the molecular formula is C4H11NOS, Related Products of amides-buliding-blocks.

Referemce:
Amide – Wikipedia,
Amide – an overview | ScienceDirect Topics

Li, Zhenghua published the artcileCO2 Activation by Lewis Pairs Generated Under Copper Catalysis Enables Difunctionalization of Imines, Application of (S)-2-Methylpropane-2-sulfinamide, the main research area is carbamate boronate complex preparation spirocyclic carbon dioxide activation imine; copper NHC catalyst carbon dioxide activation boronate imine; frustrated Lewis pair activation carbon dioxide imine preparation carbamate; crystal structure spirocyclic carbamate boronate complex; mol structure spirocyclic carbamate boronate complex.

Spirocyclic carbamatoboronates I·Li (3a-3as; Ar = Ph, substituted Ph, C6F5, naphthyl, pyridyl, furyl, dibenzofuranyl, thienyl, pyrrolyl, pyridoimidazolyl, Fc; R = Ph, substituted Ph, C6F5, benzimidazolyl, Ts, Ph2PO, Boc, TMS) were prepared by reaction of imines ArCH:NR with CO2 and B2(pin)2 catalyzed by copper NHC complexes, such as [(SIMes)CuCl] with subsequent cation metathesis with LiOtBu. Integration of distinct substrate activation modes in a catalytic circle is critical for the development of new, powerful synthetic methodologies toward complex and value-added chems. from simple and readily available feedstocks. Here, we describe a highly selective difunctionalization of imines through incorporation of activation of CO2 by intramol. N/B Lewis pairs into a copper catalytic cycle. Exptl. and computational studies on the mechanistic aspect revealed an α-borylalkylamido intermediate, a metal amide-based Lewis pair formed by borylation of a C-N double bond, and enabled an unprecedented CO2 fixation pattern that is in sharp contrast to the traditional CO2 insertion into transition-metal-element bonds. The unique lithium cyclic boracarbamate products could be easily transformed into multifunctional N-carboxylated α-amino boronates. The highly diastereoselective reactions of chiral N-tert-butanesulfinyl aldimines were also achieved. We hope that our findings may inspire further development of selective multicomponent reactions by incorporation of Lewis pair chem. into transition-metal catalysis.

Journal of the American Chemical Society published new progress about Aldimines Role: RCT (Reactant), RACT (Reactant or Reagent). 343338-28-3 belongs to class amides-buliding-blocks, name is (S)-2-Methylpropane-2-sulfinamide, and the molecular formula is C4H11NOS, Application of (S)-2-Methylpropane-2-sulfinamide.

Referemce:
Amide – Wikipedia,
Amide – an overview | ScienceDirect Topics

Antonsen, Simen Gjelseth published the artcileAtmospheric Chemistry of Methyl Isocyanide-An Experimental and Theoretical Study, HPLC of Formula: 123-39-7, the main research area is methyl isocyanide atm chem exptl theor assessment; reaction kinetics methyl isocyanide atm reaction hydroxyl radical.

The reaction of Me isocyanide (CH3NC) with OH- was examined in smog chamber experimentsusing proton transfer reaction/time of flight mass spectrometry and long-path Fourier transform IR detection. The rate coefficient was determined to be kCH3NC+OH = (7.9 ± 0.6) x 10-11 cm3/mol.-s at 298 ± 3° K and 1013 ± 10 hPa; CH3NC was the sole observed reaction product. Exptl. results were supported by CCSD(T*)-F12a/aug-cc-pVTZ//M06-2X/aug-cc-pVTZ quantum chem. calculations which showed the reaction proceeded primarily via electrophilic addition to the isocyanide carbon atom. Based on quantum chem. data, kinetics of the OH- reaction, simulated using a master equation model, showed the rate coefficient was nearly independent of pressure at tropospheric conditions and had a neg. temperature dependence with kOH = 4.2 x 10-11 cm3/mol.-s at 298° K. Addnl. quantum chem. calculations for CH3NC reactions with O3 and NO3 showed these reactions are of little importance for atm. conditions. The atm. fate of CH3NC is also discussed.

Journal of Physical Chemistry A published new progress about Air (Me isocyanide atm. fate experiments using synthetic). 123-39-7 belongs to class amides-buliding-blocks, name is N-Methylformamide, and the molecular formula is C2H5NO, HPLC of Formula: 123-39-7.

Referemce:
Amide – Wikipedia,
Amide – an overview | ScienceDirect Topics

Xu, Pin published the artcileScalable Photoelectrochemical Dehydrogenative Cross-Coupling of Heteroarenes with Aliphatic C-H Bonds, HPLC of Formula: 123-39-7, the main research area is heteroarene photoelectrochem dehydrogenative radical cross coupling light; alkylated heteroarene preparation; C−H functionalization; electrochemistry; heterocycles; photoelectrochemistry; radical reactions.

Heteroarenes are structural motifs found in many bioactive compounds and functional materials. Dehydrogenative cross-coupling of heteroarenes with aliphatic C-H bonds provides straightforward access to functionalized heteroarenes from readily available materials. Established methods employ stoichiometric chem. oxidants under conditions of heating or light irradiation By merging electrochem. and photochem., we have achieved efficient photoelectrochem. dehydrogenative cross-coupling of heteroarenes and C(sp3)-H donors through H2 evolution, without the addition of metal catalysts or chem. oxidants. Mechanistically, the C(sp3)-H donor is converted to a nucleophilic carbon radical through H-atom transfer with chlorine atom, which is produced by light irradiation of anodically generated Cl2 from Cl-. The carbon radical then undergoes radical substitution to the heteroarene to afford alkylated heteroarene products.

Angewandte Chemie, International Edition published new progress about Alcohols Role: RCT (Reactant), RACT (Reactant or Reagent). 123-39-7 belongs to class amides-buliding-blocks, name is N-Methylformamide, and the molecular formula is C2H5NO, HPLC of Formula: 123-39-7.

Referemce:
Amide – Wikipedia,
Amide – an overview | ScienceDirect Topics

Xi, Xiaomei published the artcileIridium-catalyzed diastereoselective amination of alcohols with chiral tert-butanesulfinamide by the use of a borrowing hydrogen methodology, Formula: C4H11NOS, the main research area is aralkyl alc tertiarybutyl sulfinamide iridium catalyst diastereoselective amination; tertbutyl aralkylsulfinamide preparation green chem.

An iridium-catalyzed diastereoselective amination of alcs. with chiral tert-butanesulfinamide was developed under basic conditions, affording the optically active secondary sulfinamides in high yields and diastereoselectivities. The removal of the sulfinyl group from sulfonamides allowed a facile access to a wide range of α-chiral primary amines. This synthetic strategy was further applied in the synthesis of the marketed pharmaceuticals (S)-rivastigmine and NPS R-568.

Organic & Biomolecular Chemistry published new progress about Alcohols Role: RCT (Reactant), RACT (Reactant or Reagent). 343338-28-3 belongs to class amides-buliding-blocks, name is (S)-2-Methylpropane-2-sulfinamide, and the molecular formula is C4H11NOS, Formula: C4H11NOS.

Referemce:
Amide – Wikipedia,
Amide – an overview | ScienceDirect Topics