Catalysis-chemistry

Kalaivanan, R. published the artcileSynthesis, growth and characterization of organic nonlinear optical material: N-benzyl-2-methyl-4-nitroaniline (BNA), Recommanded Product: N-Benzyl-2-methyl-4-nitroaniline, the publication is Optics & Laser Technology (2017), 27-32, database is CAplus.

Synthesis of the organic nonlinear optical compound N-benzyl-2-methyl-4-nitroaniline (BNA) was carried out in a newer chem. environment using the mixture of benzyl chloride and 2-methl-4-nitroaniline by a preferred laboratory synthesis process. The synthesized BNA compound was separated by column chromatog. (CC) with low pressure silica gell using petrollium benzine and purity of the separated resultant product was confirmed by thin layer chromatog. (TLC). Further, the material was recrystallized atleast four times in methanol and the highly purified BNA was used for the growth of single crystals from solutions with selected solvents by slow evaporation method at room temperature Single crystals having natural growth morphol. were harvested and their different growth faces were identified by optical goniometry. The grown crystals were subjected to different characterization techniques such as powder x-ray diffraction (PXRD), fourier transform IR spectroscopy (FTIR), differential scanning calorimetry (DSC) and UV-vis-Near IR spectroscopy. Further, the second harmonic generation (SHG) efficiency of the grown BNA crystal was studied by Kurtz and Perry powder technique using Nd:YAG laser as fundamental source and found to be twice that of inorganic standard KDP.

Optics & Laser Technology published new progress about 201157-13-3. 201157-13-3 belongs to catalysis-chemistry, auxiliary class Nitro Compound,Amine,Benzene, name is N-Benzyl-2-methyl-4-nitroaniline, and the molecular formula is C14H14N2O2, Recommanded Product: N-Benzyl-2-methyl-4-nitroaniline.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Senthilkumar, P. published the artcileSynthesis of 2-amino-3-phenylpropan-1-ol compounds from Baylis-Hillman derivatives, carbon nanotube, kinetic, lifetime and biological studies, Formula: C10H11NO4, the publication is Rasayan Journal of Chemistry (2018), 11(1), 175-180, database is CAplus.

A novel class of 2-amino-3-phenylpropane-1-ol compounds I [R¹ = Me, Cl; R² = Cl, MeO; R³ = Me, Et, i-Pr, F, Cl, MeO; R²R³ = OCH₂O] was synthesized by carbon nanotube method reaction for the first time. The iron acidic acid reduction reaction was also carried out on Baylis-Hillman adducts to synthesize an array of novel 2-amino-3-phenylpropane-1-ol compounds I from nitroolefin derivatives reaction with good yields. Amine compounds I were carried out for kinetic and biol. studies. Compound I [R¹ = Me, R² = R³ = H] showed highest antimicrobial activity against Escherichia coli, Klebsiella sp, Candida albicans, Salmonella typhi and Staphylococcus aureus whereas compound I [R¹ = R² = H, R³ = F] showed the lowest activity.

Rasayan Journal of Chemistry published new progress about 4230-93-7. 4230-93-7 belongs to catalysis-chemistry, auxiliary class Alkenyl,Nitro Compound,Benzene,Ether, name is 1,2-Dimethoxy-4-(2-nitrovinyl)benzene, and the molecular formula is C13H13N, Formula: C10H11NO4.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Biswas, Nandita published the artcileRu-Catalyzed Selective Catalytic Methylation and Methylenation Reaction Employing Methanol as the C1 Source, Quality Control of 104-03-0, the publication is Journal of Organic Chemistry (2021), 86(15), 10544-10554, database is CAplus and MEDLINE.

The activity of the acridine-derived SNS-Ru pincer for the activation of methanol to apply it as a C1 building block in different reactions was explored. Catalytic system showed great success toward the ¦Â-C(sp³)-methylation reaction of 2-phenylethanols to provide good to excellent yields of the methylated products RCH(CH₃)CH₂OH [R = Ph, 4-FC₆H₄, 2-thienyl, etc.]. The mechanistic details, kinetic progress and temperature-dependent product distribution, which revealed the slow and steady generation of in situ formed aldehyde, was the key factor to get the higher yield of the ¦Â-methylated product. To establish the environmental benefit of this reaction, green chem. metrics were calculated Furthermore, dimerization of 2-naphthol via methylene linkage to obtain methylated products I [R¹ = H, 3-MeO, 6-Ph, etc.] and formation of N-methylation of amine were also described in this study, which offers a wide range of substrate scope with a good to excellent yield of methylated products R²NHCH₃ [R² = (CH₂)₇CH₃, Ph, 2-BrC₆H₄, etc.].

Journal of Organic Chemistry published new progress about 104-03-0. 104-03-0 belongs to catalysis-chemistry, auxiliary class Nitro Compound,Carboxylic acid,Benzene, name is 4-Nitrophenylacetic acid, and the molecular formula is C8H7NO4, Quality Control of 104-03-0.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Bunrit, Anon published the artcileH₃PO₂-Catalyzed Intramolecular Stereospecific Substitution of the Hydroxyl Group in Enantioenriched Secondary Alcohols by N-, O-, and S-Centered Nucleophiles to Generate Heterocycles, Product Details of C10H10O3, the publication is ACS Catalysis (2020), 10(2), 1344-1352, database is CAplus.

The direct intramol. stereospecific substitution of the hydroxyl group in enantiomerically enriched secondary benzylic, allylic, propargylic, and alkyl alcs. was successfully accomplished by phosphinic acid catalysis. The hydroxyl group was displaced by O-, S-, and N-centered nucleophiles to provide enantioenriched five-membered THF, pyrrolidine, and tetrahydrothiophene as well as six-membered tetrahydroquinolines and chromanes in up to a 99% yield and 100% enantiospecificity with water as the only byproduct. Mechanistic studies using both experiments and calculations have been performed for substrates generating 5-membered heterocycles. Rate studies show dependences in a catalyst, an internal nucleophile, and an electrophile, however, independence in an external nucleophile, an electrophile, or water. Kinetic isotope effect studies show an inverse KIE of k_H/k_D = 0.79. Furthermore, phosphinic acid does not promote S_N1 reactivity. Computational studies support a bifunctional role of the phosphinic acid in which activation of both nucleofuge and nucleophile occurs in a bridging S_N2-type transition state. In this transition state, the acidic hydrogen of phosphinic acid protonates the leaving hydroxyl group simultaneously as the oxo group partially deprotonates the nucleophile. Thereby, phosphinic acid promotes the substitution of the nonderivatized hydroxyl group in enantioenriched secondary alcs. by uncharged nucleophiles with conservation of the chirality from the alc. to the heterocycle.

ACS Catalysis published new progress about 2051-95-8. 2051-95-8 belongs to catalysis-chemistry, auxiliary class Carboxylic acid,Benzene,Ketone, name is 3-Benzoylpropionicacid, and the molecular formula is C10H10O3, Product Details of C10H10O3.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Kaplaneris, Nikolaos published the artcileEnantioselective Organocatalytic Synthesis of 2-Oxopiperazines from Aldehydes: Identification of the Elusive Epoxy Lactone Intermediate, Computed Properties of 140-28-3, the publication is Organic Letters (2016), 18(22), 5800-5803, database is CAplus and MEDLINE.

An organocatalytic linchpin catalysis approach was envisaged to convert simple aldehydes into enantioenriched 2-oxopiperazines. A four-step reaction sequence (chlorination, oxidation, substitution, and cyclization) was developed and led to different substitution patterns in high yields and selectivities. The reaction mechanism was studied, and the previously elusive epoxy lactone intermediate was identified by HRMS.

Organic Letters published new progress about 140-28-3. 140-28-3 belongs to catalysis-chemistry, auxiliary class Benzenes, name is N1,N2-Dibenzylethane-1,2-diamine, and the molecular formula is C16H20N2, Computed Properties of 140-28-3.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Tucker, Lucas J. published the artcileHolography via liquid crystalline photopolymerization: The effect of various additives, Computed Properties of 2909-77-5, the publication is Polymer Preprints (American Chemical Society, Division of Polymer Chemistry) (2006), 47(2), 523-524, database is CAplus.

Photopolymerization of nematic liquid crystalline diacrylate monomer mixtures with a cyanophenyl heptylbenzoate dielec. dopant, photoinitiators, and a trithiocarbonate, was shown to give rise to elec. stable gratings. The effects of several types of additives on grating formation were studied. The additives include an inhibitor, a co-initiator, and an anti-bleaching accelerator. The additive with the greatest impact on the mixture is a trithiocarbonate.

Polymer Preprints (American Chemical Society, Division of Polymer Chemistry) published new progress about 2909-77-5. 2909-77-5 belongs to catalysis-chemistry, auxiliary class Amine,Benzene, name is 2,6-Diisopropyl-N,N-dimethylaniline, and the molecular formula is C16H14O6, Computed Properties of 2909-77-5.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Schroth, Werner published the artcile1,3-Thiazine syntheses with ¦Â-diketones via enol phosphate, Related Products of catalysis-chemistry, the publication is Synthesis (1983), 827-30, database is CAplus.

RCOCH₂COR (R = Ph; 4-MeOC₆H₄, Me) were successively treated with Na or NaOMe, then (PhO)₂P(O)Cl in C₆H₆ or Et₂O to give 58-75% RCOCH:CROP(O)(OPh)₂ which were cyclized with H₂NC(S)R¹ (R¹ = Ph, Me, CMe₃, SEt, NH₂, NMe₂, morpholino, PhCH:NNH, MeEtC:NNH, 4-MeC₆H₄SO₂NHNH, 4-MeOC₆H₄) in AcOH containing POCl₃, with dropwise addition of 70% HClO₄ to give 39-97% thiazinium perchlorates I.

Synthesis published new progress about 6972-05-0. 6972-05-0 belongs to catalysis-chemistry, auxiliary class Thiourea,Amine,Aliphatic hydrocarbon chain,Amide, name is 1,1-Dimethylthiourea, and the molecular formula is C3H8N2S, Related Products of catalysis-chemistry.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Schroth, W. published the artcileSynthesis of 1,3-thiazinium salts from ¦Â-chlorovinyl ketones and thio amide functionalized compounds, SDS of cas: 6972-05-0, the publication is Tetrahedron (1982), 38(7), 937-48, database is CAplus.

Thiocarbamoyl compounds reacted with ¦Â-chlorovinyl ketones to give 1,3-thiazinium salts via S-ketovinylthioimidium derivatives E.g., condensation reaction of Me₃CCSNH₂ with 4-MeC₆H₄COCH:CHCl in HClO₄ gave the intermediate 4-MeC₆H₄COCH:CHSC(:N⁺H₂)CMe₃ ClO₄^– which underwent acid-catalyzed cyclocondensation reaction to give 72% thiazinium salt I. The thiazinium salts react with nucleophilic reagents preferentially at position 6. E.g., substitution reaction of I with morpholine at -20¡ã gave 94% thiazine II. The scope of the cyclocondensation reaction is discussed.

Tetrahedron published new progress about 6972-05-0. 6972-05-0 belongs to catalysis-chemistry, auxiliary class Thiourea,Amine,Aliphatic hydrocarbon chain,Amide, name is 1,1-Dimethylthiourea, and the molecular formula is C3H8N2S, SDS of cas: 6972-05-0.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

McCoy, Michael A. published the artcileBiophysical Survey of Small-Molecule ¦Â-Catenin Inhibitors: A Cautionary Tale, Name: Fmoc-Pro-OH, the publication is Journal of Medicinal Chemistry (2022), 65(10), 7246-7261, database is CAplus and MEDLINE.

The canonical Wingless-related integration site signaling pathway plays a critical role in human physiol., and its dysregulation can lead to an array of diseases. ¦Â-Catenin is a multifunctional protein within this pathway and an attractive yet challenging therapeutic target, most notably in oncol. This has stimulated the search for potent small-mol. inhibitors binding directly to the ¦Â-catenin surface to inhibit its protein-protein interactions and downstream signaling. Here, we provide an account of the claimed (and some putative) small-mol. ligands of ¦Â-catenin from the literature. Through in silico anal., we show that most of these mols. contain promiscuous chem. substructures notorious for interfering with screening assays. Finally, and in line with this anal., we demonstrate using orthogonal biophys. techniques that none of the examined small mols. bind at the surface of ¦Â-catenin. While shedding doubts on their reported mode of action, this study also reaffirms ¦Â-catenin as a prominent target in drug discovery.

Journal of Medicinal Chemistry published new progress about 71989-31-6. 71989-31-6 belongs to catalysis-chemistry, auxiliary class Amino acide derivatives,pyrrolidine, name is Fmoc-Pro-OH, and the molecular formula is C20H19NO4, Name: Fmoc-Pro-OH.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Ho, Benedict Y. K. published the artcileFragmentation and rearrangement processes in the high resolution mass spectra of diphenylsilyl compounds, Related Products of catalysis-chemistry, the publication is Organic Mass Spectrometry (1975), 10(5), 361-9, database is CAplus.

High resolution mass spectra of Ph2SiR2 (R = H, F, Cl) and Ph2Si(OR1)2 (R1 = Et, Me, H) were recorded. Metastable defocusing experiments showed that, if R or OR1 can be readily lost stepwise, the relative abundance of the biphenyl radical ion (I) is small, whereas, if neutral Si species such as :SiR2, ¡¤SiR, or :Si(OR1)2 are readily eliminated, the relative abundance I is large. I originates from both odd- and even-electron ions.

Organic Mass Spectrometry published new progress about 312-40-3. 312-40-3 belongs to catalysis-chemistry, auxiliary class Organic Silicones, name is Difluorodiphenylsilane, and the molecular formula is C12H10F2Si, Related Products of catalysis-chemistry.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia