Tag: M.W=200-250

Schneider, Astrid published the artcileA thiolate-zinc complex with a Zn₄O₄ bicyclooctane framework, Application of 2,4,6-Triisopropylbenzenethiol, the publication is Zeitschrift fuer Anorganische und Allgemeine Chemie (2001), 627(8), 1771-1774, database is CAplus.

The reaction of ZnEt₂ with 2,4,6-triisopropylthiophenol (HSR^*) and N-methyl-2-hydroxymethylimidazole (ImCH₂OH) in MeOH yields the complex Zn₄(SR^*)₄(ImCH₂O)₃(OMe) with terminal SR^* and bridging ImCH₂O and MeO ligands. The structure of its Zn₄O₄ framework is that of a bicyclo[2.2.2]octane with Zn and O at the two apices. Crystal data: triclinic, P1?, a = 15.293(3), b = 17.453(4), c = 18.894(4) ?, ¦Á = 74.24(3), ¦Â = 71.44(3), ¦Ã = 73.15(3)¡ã, V = 4485.2(2) ?³, Z = 2, ¦Ñ_c = 1.29 g/cm³, ¦Ì(MoK¦Á) = 1.32 mm^-1, 6487 observed reflections with I > 2¦Ò(I), 901 refined parameters, R₁ = 0.091, wR₂ (all data) = 0.323.

Zeitschrift fuer Anorganische und Allgemeine Chemie published new progress about 22693-41-0. 22693-41-0 belongs to catalysis-chemistry, auxiliary class Other Functionalization Reagent, name is 2,4,6-Triisopropylbenzenethiol, and the molecular formula is C15H24S, Application of 2,4,6-Triisopropylbenzenethiol.

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

Schneider, Astrid published the artcileStructural modeling of alcohol dehydrogenase. Zinc complexes of acetyl- and benzoyl-pyridine, Quality Control of 22693-41-0, the publication is Zeitschrift fuer Anorganische und Allgemeine Chemie (2003), 629(12-13), 2122-2126, database is CAplus.

The N,O chelate ligands acetyl- and benzoyl-pyridine (L) react with ZnCl₂ to form 5- and 6-coordinate complexes of the compositions L₂ZnCl₂ and [L₂ZnCl]⁺. The Zn pentafluorothiophenolate and 2,4,6-triisopropylthiophenolate, however, yield tetrahedral complexes of composition L?Zn(SR)₂. These are structural models of the Zn(NOS₂) bonding situation during aldehyde attachment in the active center of the enzyme alc. dehydrogenase.

Zeitschrift fuer Anorganische und Allgemeine Chemie published new progress about 22693-41-0. 22693-41-0 belongs to catalysis-chemistry, auxiliary class Other Functionalization Reagent, name is 2,4,6-Triisopropylbenzenethiol, and the molecular formula is C15H24S, Quality Control of 22693-41-0.

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

Naksomboon, Kananat published the artcileS,O-Ligand-Promoted Palladium-Catalyzed C-H Functionalization Reactions of Nondirected Arenes, Product Details of C9H12O3S, the publication is ACS Catalysis (2017), 7(9), 6342-6346, database is CAplus and MEDLINE.

Pd(II)-catalyzed C-H functionalization of nondirected arenes has been realized using an inexpensive and easily accessible type of bidentate S,O-ligand. The catalytic system shows high efficiency in the C-H olefination reaction of electron-rich and electron-poor arenes. This methodol. is operationally simple, scalable, and can be used in late-stage functionalization of complex mols. The broad applicability of this catalyst has been showcased in other transformations such as Pd(II)-catalyzed C-H acetoxylation and allylation reactions.

ACS Catalysis published new progress about 77189-99-2. 77189-99-2 belongs to catalysis-chemistry, auxiliary class Thiophenol,Benzene,Ether, name is 2,4,6-Trimethoxybenzenethiol, and the molecular formula is C9H12O3S, Product Details of C9H12O3S.

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

Tangen, Isaac C. published the artcileComprehensive characterization of terahertz generation with the organic crystal BNA, Quality Control of 201157-13-3, the publication is Journal of the Optical Society of America B: Optical Physics (2021), 38(9), 420597, database is CAplus.

We characterize the terahertz (THz) generation of N-benzyl-2-methyl-4-nitroaniline (BNA), with crystals ranging in thickness from 123 to 700¦Ìm. We compare excitation using 800 nm and 1250 to 1500 nm wavelengths. Pumping BNA with 800 nm wavelengths and longer near-IR wavelengths results in a broad spectrum, producing out to 6 THz using a 100 fs pump, provided the BNA crystal is thin enough. ~200¦Ìm or thinner crystals are required to produce a broad spectrum with an 800 nm pump, whereas ~300¦Ìm thick crystals are optimal for broadband THz generation using the longer wavelengths. We report the favorable THz generation and optical characteristics of our BNA crystals that make them attractive for broadband, high-field THz generation, and we also compare differences in THz properties relative to BNA characteristics reported in other works.

Journal of the Optical Society of America B: Optical Physics 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 C25H34N4O2S, Quality Control of 201157-13-3.

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

Kibardina, L. K. published the artcileAzomethines Based on Pyridoxal-Derived Aromatic Aldehydes, Application In Synthesis of 140-28-3, the publication is Russian Journal of General Chemistry (2018), 88(1), 41-47, database is CAplus.

The reaction of pyridoxal with 2,4-dihydroxybenzaldehyde in a hydrochloric acid solution gave 1-(5-formyl-2,4-dihydroxyphenyl)-7-hydroxy-6-methyl-1,3-dihydrofuro[3,4-c]pyridin-5-ium chloride. Treatment of the latter with sodium hydride in ethanol afforded a free aldehyde, 2,4-dihydroxy-5-(7-hydroxy-6-methyl-1,3-dihydrofuro[3,4-c]pyridin-1-yl)benzaldehyde in 85% yield. A series of azomethines I [R = (CH₂)₃NMe, Ph, 4-H₂NC₆H₄, etc.] and imidazolidines II [R¹ = Me, Bn] was obtained by reacting the obtained aldehyde with various amines and diamines.

Russian Journal of General Chemistry 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, Application In Synthesis of 140-28-3.

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

Kibardina, L. K. published the artcilePyridoxal reactions with amines and aliphatic diamines, Recommanded Product: N1,N2-Dibenzylethane-1,2-diamine, the publication is Russian Journal of General Chemistry (2016), 86(3), 607-612, database is CAplus.

Interaction of pyridoxal with amines such as pyridin-2-amine, N-(2-aminoethyl)aniline, methyl[2-(methylamino)ethyl]amine, etc. led to the formation of compounds having imine, imidazolidine and pyrimidine moieties in their structure, e.g., I. Structure of the obtained compounds was proved by X-ray diffraction anal.

Russian Journal of General Chemistry 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, Recommanded Product: N1,N2-Dibenzylethane-1,2-diamine.

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

Alfie, Rachel J. published the artcileA kinetically controlled direct aldol addition of ¦Á-chloro thioesters via soft enolization, Category: catalysis-chemistry, the publication is Tetrahedron Letters (2017), 58(3), 185-189, database is CAplus.

¦Á-Chloro thioesters such as ClCH₂COSR (R = 2,4,6-i-Pr₃C₆H₂)(I) underwent diastereoselective aldol additions to aldehydes R¹CHO [R¹ = 2-naphthyl, Ph, t-Bu, cyclohexyl, i-Pr, PhCH₂CH₂, Me(CH₂)₆] in the presence of MgBr₂¡¤OEt₂ and i-Pr₂NEt in CH₂Cl₂ at -78¡ã to give the syn-aldol adducts II [R¹ = 2-naphthyl, Ph, t-Bu, cyclohexyl, i-Pr, PhCH₂CH₂, Me(CH₂)₆] as the major products in 40-80% yields and in 2:1-11:1 dr. Both enolizable and nonenolizable aldehydes underwent chemo- and stereoselective aldol addition under these conditions. At -78¡ã, the reactions are kinetically controlled, as shown by the lack of aldehyde exchange when p-tolualdehyde and an aldol adduct were submitted to the reaction conditions at -78¡ã. Aldol addition of I to (S)-i-PrCH(OTBDMS)CHO (TBDMS = tert-butyldimethylsilyl) at either -78¡ã or 24¡ã yielded III (R² = COSR) as a single diastereomer. The structure of III (R² = HOCH₂) was determined by X-ray crystallog.

Tetrahedron Letters published new progress about 22693-41-0. 22693-41-0 belongs to catalysis-chemistry, auxiliary class Other Functionalization Reagent, name is 2,4,6-Triisopropylbenzenethiol, and the molecular formula is C15H24S, Category: catalysis-chemistry.

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

Yoshida, Jun-ichi published the artcileDirect Conversion of Hydrosilanes to Fluorosilanes with CuF₂¡¤2H₂O/CCl₄, SDS of cas: 312-40-3, the publication is Organometallics (1995), 14(1), 567-9, database is CAplus.

The reaction of hydrosilanes, e.g., Ph₃SiH, with Cu^IIF₂¡¤2H₂O in refluxing CCl₄ gave the corresponding fluorosilanes, e.g., Ph₃SiF, in good yields. In THF hydrosilanes were recovered unchanged. X-ray powder anal. of the solid products indicated the formation of Cu^ICl. Probably both CCl₄ and Cu^II act as oxidants for hydrosilanes.

Organometallics 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 C12H10O4S, SDS of cas: 312-40-3.

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

Rao, Ramakoteswara published the artcilePolyethylene glycol (PEG-400) as an efficient and recyclable reaction media for the synthesis of substituted 4-(1-aryl-2-nitroethyl)-3-methyl-1H-pyrazol-5-ol in catalyst free conditions, Formula: C10H11NO4, the publication is Journal of Chemical and Pharmaceutical Research (2015), 7(8), 1031-1035, database is CAplus.

Polyethylene glycol (PEG-400) was found to be an effective reaction medium for the one-pot synthesis of 4-(1-aryl-2-nitroethyl)-3-methyl-1H-pyrazol-5-ol derivatives in good yields under mild reaction conditions. The use of PEG-400 makes this method low cost, recyclable, and eco-friendly.

Journal of Chemical and Pharmaceutical Research 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 C10H11NO4, Formula: C10H11NO4.

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

Li, Yankun published the artcileSynthesis of Benzofuran Derivatives via a Gold-Catalyzed Claisen Rearrangement Cascade, Computed Properties of 312-40-3, the publication is Organic Letters (2022), 24(31), 5829-5834, database is CAplus and MEDLINE.

A novel method toward a facile synthesis of diverse benzofuran derivatives I [R = Me, Et, Ph, etc.; R¹ = Me, Et] from easily obtained quinols and alkynyl esters was reported. A gold-catalyzed intermol. alkoxylation/Claisen rearrangement/condensation cascade was involved. The introduction of difluorodiphenylsilane as a water-trapping reagent in the reaction led to a higher yield.

Organic Letters 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, Computed Properties of 312-40-3.

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