Tag: 200-300

On June 12, 2017, Zhu, Lei; Qi, Xiaotian; Li, Yingzi; Duan, Meng; Zou, Lufeng; Bai, Ruopeng; Lan, Yu published an article.Product Details of 1417036-28-2 The title of the article was Ir(III)/Ir(V) or Ir(I)/Ir(III) Catalytic Cycle? Steric-Effect-Controlled Mechanism for the para-C-H Borylation of Arenes. And the article contained the following:

A potential energy surface for iridium-catalyzed C-H-borylation of aromatic compounds was calculated; while bulky phosphine ligands favor Ir(I)-Ir(III) C-H activation, small amine ligands promote formation of triboryl Ir(V) intermediates. D. functional theory method N12 was used to study the mechanism of the [Ir(cod)OH]2/Xyl-MeO-BIPHEP-catalyzed para-selective C-H borylation reaction. The results revealed that the use of a bulky diphosphine ligand such as Xyl-MeO-BIPHEP was unfavorable for the previously proposed iridium(III)/iridium(V) catalytic cycle because it resulted in considerable steric repulsion in the hepta-coordinated iridium(V) intermediate. Inspired by this steric effect, we have proposed a novel iridium(I)/iridium(III)-based catalytic cycle for this transformation and shown that it can be used to account for the exptl. results. The iridium(I)/iridium(III) catalytic cycle induced by this steric effect consists of several steps, including: (i) the oxidative addition of the C-H bond of the substrate to an active iridium(I) boryl complex; (ii) the reductive elimination of a C-B bond; (iii) the oxidative addition of B2pin2 to an iridium(I) hydride complex; and (iv) the reductive elimination of a B-H bond. Notably, the computed regioselectivity of this reaction was consistent with the exptl. observations. The high para-selectivity of this reaction was also explained using structural anal. and a 2D contour model, which revealed that the strong steric repulsion between the diphosphine ligand and the meta-substituents resulted in a higher energy barrier for meta-C-H activation. The experimental process involved the reaction of 2-(3-Methoxy-4-methylphenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane(cas: 1417036-28-2).Product Details of 1417036-28-2

The Article related to potential energy surface direct ch borylation arene iridium catalyst, diphosphine diamine iridium complex catalyst arene borylation intermediate geometry, steric effect ligand mechanism direct borylation arene iridium catalyst and other aspects.Product Details of 1417036-28-2

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Ether – Wikipedia,
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On April 4, 2000, Neef, C. J.; Ferraris, J. P. published an article.Related Products of 146370-51-6 The title of the article was MEH-PPV: Improved Synthetic Procedure and Molecular Weight Control. And the article contained the following:

Mechanistic studies on the polymerization of α,α’-dibromo-2-methoxy-5-(2-ethylhexyloxy)xylene have been performed. Polymerizations were initially carried out by adding potassium tert-butoxide to monomer in the presence of a chain transfer agent, anthracene. Anthracene showed little effect on the mol. weight of the resulting polymer, suggesting that the major polymerization route was not radically initiated. Polymerizations were also carried out by adding monomer to potassium tert-butoxide in presence of a nucleophile, 4-methoxyphenol. The mol. weight of the resulting polymer scaled linearly with the amount of 4-methoxyphenol, suggesting an anionic mechanism. In addition, each polymerization was monitored by in-situ torque measurements to further elucidate the polymerization mechanism and optimize polymerization conditions. The experimental process involved the reaction of 1-((2-Ethylhexyl)oxy)-4-methoxybenzene(cas: 146370-51-6).Related Products of 146370-51-6

The Article related to polyphenylenevinylene methoxy ethylhexyloxy conjugated polymer preparation, chain transfer agent anthracene polyphenylenevinylene preparation, nucleophile methoxyphenol polyphenylenevinylene anionic polymerization preparation and other aspects.Related Products of 146370-51-6

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On October 18, 2002, Capozzi, Maria Annunziata M.; Cardellicchio, Cosimo; Naso, Francesco; Rosito, Valerio published an article.Safety of Benzyl(4-bromophenyl)sulfane The title of the article was A Straightforward Enantioselective Route to Dialkyl Sulfoxides Based upon Two Carbon-for-Carbon Substitution Reactions on the Sulfinyl Group. And the article contained the following:

(R)-Benzyl p-bromophenyl sulfoxide (I) was obtained on a multigram scale and in an enantiomerically pure form by enantioselective catalytic oxidation of benzyl p-bromophenyl sulfide with tert-Bu hydroperoxide in the presence of chiral titanium complexes. Some mechanistic and stereochem. features of the process were also studied. I was then subjected to two consecutive substitution reactions with different Grignard reagents, which caused two sequentially stereocontrolled carbon-for-carbon displacements, leading to chiral nonracemic dialkyl sulfoxides. The experimental process involved the reaction of Benzyl(4-bromophenyl)sulfane(cas: 53136-21-3).Safety of Benzyl(4-bromophenyl)sulfane

The Article related to sulfoxide dialkyl chiral enantioselective preparation, sulfide benzyl bromophenyl chiral titanium complex catalyzed enantioselective oxidation, benzylsulfoxide bromophenyl preparation stereoselective grignard substitution and other aspects.Safety of Benzyl(4-bromophenyl)sulfane

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Ether – Wikipedia,
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On April 6, 2004, Neef, C. J.; Ferraris, J. P. published an article.Application of 146370-51-6 The title of the article was MEH-PPV: improved synthetic procedure and molecular weight control. [Erratum to document cited in CA132:308756]. And the article contained the following:

In Table 2 on page 2313, the polydispersity (PD) values for the polymerizations using 1.05 and 2.0% 4-methoxyphenol are listed as 1.52 and 1.14, resp. The correct PD values are 1.14 for 1.0% 4-methoxyphenol and 1.52 for 2.0% 4-methoxyphenol. The corrected table is given. The corrected values show a clear relation between the amount of 4-methoxyphenol and polymerization yield, mol. weights, and PD values. The experimental process involved the reaction of 1-((2-Ethylhexyl)oxy)-4-methoxybenzene(cas: 146370-51-6).Application of 146370-51-6

The Article related to erratum polyphenylenevinylene methoxy ethylhexyloxy conjugated polymer preparation, chain transfer agent anthracene polyphenylenevinylene preparation erratum, nucleophile methoxyphenol polyphenylenevinylene anionic polymerization preparation erratum and other aspects.Application of 146370-51-6

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Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Zhang, He; Cao, Tongxiang; Luo, Hejiang; Chen, Lianfen; Zhu, Shifa published an article in 2019, the title of the article was Enynone-enabled migratory insertion and Schmittel cyclization cascade for the synthesis of furan-fused fluorenes.Category: ethers-buliding-blocks And the article contains the following content:

A new method for the synthesis of furan-/benzo-fused fluorenes through copper(I)-catalyzed coupling of conjugated enynones or α-diazocarbonyl compounds with dialkynylbenzenes were developed. This process included 5-exo-dig cyclization, carbene migratory insertion, Schmittel cyclization and 1,5-H transfer. The obvious advantages of wide substrate scopes, mild reaction conditions and high atom efficiency make this system highly appealing for the construction of six-substituted benzofuran-embedded fluorenes in a one-pot manner. The experimental process involved the reaction of 2-((4-Methoxyphenyl)ethynyl)aniline(cas: 157869-15-3).Category: ethers-buliding-blocks

The Article related to propynylidene alkane dione dialkynylbenzene preparation copper tandem regioselective cyclization, carbonyl fluorenofuran preparation, diazo phenylacetate dialkynylbenzene preparation copper tandem cyclization, benzofluorene carboxylate preparation and other aspects.Category: ethers-buliding-blocks

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Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

On June 30, 2014, Soleiman-Beigi, Mohammad; Kazemi, Mosstafa; Aryan, Reza; Shiri, Lotfi published an article.Quality Control of Benzyl(4-bromophenyl)sulfane The title of the article was TBAOH mediated: An efficient and simple procedure for alkylation of alcohols, phenols and thiols under neat aqueous conditions. And the article contained the following:

Aqueous Bu4NOH (TBAOH) solution was used as a green reaction medium and efficient catalyst for the O-alkylation of alcs. and phenols as well as S-alkylation of thiols under a novel, mild, and convenient procedure. Herein, TBAOH was used as a strong base, medium of reaction, and phase transfer reagent. The experimental process involved the reaction of Benzyl(4-bromophenyl)sulfane(cas: 53136-21-3).Quality Control of Benzyl(4-bromophenyl)sulfane

The Article related to alc alkyl halide alkylation butylammonium hydroxide water, phenol alkyl halide alkylation butylammonium hydroxide water, thiol alkyl halide alkylation butylammonium hydroxide water, ether preparation green chem, thioether preparation green chem and other aspects.Quality Control of Benzyl(4-bromophenyl)sulfane

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

On March 6, 2020, Ling, Fei; Song, Dingguo; Chen, Linlin; Liu, Tao; Yu, Mengyao; Ma, Yan; Xiao, Lian; Xu, Min; Zhong, Weihui published an article.SDS of cas: 157869-15-3 The title of the article was Syntheses of N-Alkyl 2-Arylindoles from Saturated Ketones and 2-Arylethynylanilines via Cu-Catalyzed Sequential Dehydrogenation/aza-Michael Addition/Annulation Cascade. And the article contained the following:

A Cu-catalyzed and 4-OH-TEMPO-mediated sequential dehydrogenation/aza-Michael addition/annulation cascade reaction for the construction of N-alkyl 2-arylindoles I (R = H, 2-F, 3-OMe, 4-Cl, etc.; R1 = H, F, Cl, OMe, C(O)OCH3; R2 = H; R3 = H, Cl; R2R3 = -CH=CHCH=CH-; R4 = Ph, Me, pyridin-3-yl, thiophen-2-yl, etc.) and from facilely available saturated ketones R4C(O)CH2CH3 and 2-arylethynylanilines 2-RC6H4CC-4-R1-5-R2-6-R3C6HNH2 was described. This reaction shows high regioselectivity and tolerates a variety of functional groups. Moreover, 3-alkyl-substituted indoles II (R5 = Bu, tert-Bu, pentyl, propyl) can also be obtained when using 2-alkylethynylanilines 2-R5CCC6H4NH2 as starting materials. The experimental process involved the reaction of 2-((4-Methoxyphenyl)ethynyl)aniline(cas: 157869-15-3).SDS of cas: 157869-15-3

The Article related to alkyl arylindole preparation regioselective, arylethynylaniline preparation ketone dehydrogenation michael cyclization tandem copper catalyst, alkylethynylaniline preparation ketone dehydrogenation michael cyclization tandem copper catalyst and other aspects.SDS of cas: 157869-15-3

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Yu, Liu-Zhu; Wei, Yin; Shi, Min published an article in 2017, the title of the article was Copper-catalyzed trifluoromethylazidation and rearrangement of aniline-linked 1,7-enynes: access to CF3-substituted azaspirocyclic dihydroquinolin-2-ones and furoindolines.Electric Literature of 157869-15-3 And the article contains the following content:

A set of reactions involving copper-catalyzed trifluoromethylazidation and then rearrangement of aniline-linked 1,7-enynes with the relatively poorly reactive Togni reagent and TMSN3 was developed, and provided facile access to structurally diverse and useful CF3-substituted azaspirocyclic dihydroquinolin-2-ones I [R1 = H, 4-Cl, 4-CN, etc.; R2 = Ph, 4-ClC6H4, 2-naphthyl, etc.; R3 = Ms, Bn, Ts, etc.; R4 = Me, Ph] bearing two adjacent quaternary carbon centers. These products were also obtained on a large scale. Moreover, the obtained products were further transformed into a range of synthetically valuable furoindolines bearing three consecutive quaternary carbon centers after reduction by NaBH4. Also, the delivery of multi-functionalized aziridines as a result of alcoholysis and LiAlH4-reduction of corresponding dihydroquinolin-2-ones I [R1 = H, R2 = Ph, R3 = Ts, R4 = Me] demonstrated the synthetic value of this newly developed protocol. The experimental process involved the reaction of 2-((4-Methoxyphenyl)ethynyl)aniline(cas: 157869-15-3).Electric Literature of 157869-15-3

The Article related to arylethynyl phenyl acrylamide copper catalyst regioselective trifluoromethylaziridination rearrangement, trifluromethyl azaspirocyclic dihydroquinolinone diastereoselective preparation sodium borohydride reduction, furoindoline preparation and other aspects.Electric Literature of 157869-15-3

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Ether – Wikipedia,
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Hernandez-Vazquez, Eduardo; Miranda, Luis D. published an article in 2016, the title of the article was Practical synthesis and cytotoxic evaluation of the pyrazino[1,2-b]-isoquinoline ring system.Electric Literature of 887581-09-1 And the article contains the following content:

A practical three-step protocol for the synthesis of pyrazino[1,2-b]isoquinolines I [R1 = H, 4-Me, 5-MeO, 5-F, etc.; R2 = t-Bu, cyclohexyl, 2,6-diMeC6H3, benzyl, etc.] was reported. This approach included a one-pot parallel cyclization/cyclization parallel process followed by a non-common 6-endo Heck cyclization that transformed previously constructed Ugi adducts into diversely decorated tricyclic systems. Compounds bearing a t-Bu or 2,6-dimethylphenyl substituent showed significant cytotoxic activity. The most active analog I (R1 = CH2O2; R2 = 2,6-diMeC6H3) showed significant activity against HCT-15 and K562 (IC50 = 41.8 ± 3.3 and 57.7 ± 2.1 μM, resp.) with no cytotoxicity against human gingival fibroblasts. The experimental process involved the reaction of (2-Bromo-5-methoxyphenyl)methanamine(cas: 887581-09-1).Electric Literature of 887581-09-1

The Article related to benzylamine isocyanide benzoyloxy acetaldehyde chloroacetic acid ugi reaction, bromo chloroacetylamiono oxopropylamino benzoate preparation heck reaction, pyrazinoisoquinoline preparation antitumor activity structure activity relationship and other aspects.Electric Literature of 887581-09-1

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Xie, Jialin; Guo, Zhonglin; Huang, Yuanqiong; Qu, Yi; Song, Hongjian; Song, Haibin; Liu, Yuxiu; Wang, Qingmin published an article in 2019, the title of the article was One-Pot Copper-Catalyzed Cascade Bicyclization Strategy for Synthesis of 2-(1H-Indol-1-yl)-4,5-dihydrothiazoles and 2-(1H-Indol-1-yl)thiazol-5-yl Aryl Ketones with Molecular Oxygen as an Oxygen Source.Reference of 2-((4-Methoxyphenyl)ethynyl)aniline And the article contains the following content:

An atom-economical method for synthesizing N-heterocyclic indoles from readily available o-alkynylphenyl isothiocyanates and propargylamine derivatives is reported. This method involves a copper-catalyzed cascade bicyclization process consisting of an intramol. 5-exo-dig hydrothiolation reaction and an intramol. hydroamination reaction and, depending on whether or not mol. oxygen is present, selectively affords Z-isomers of 2-(1H-indol-1-yl)-4,5-dihydrothiazoles, e.g., I (X-rays single crystal structure shown), or 2-(1H-indol-1-yl)thiazol-5-yl aryl ketones in satisfactory yields. Mechanistic studies indicate that mol. oxygen acts as the oxygen source for the ketone moiety in the products. The experimental process involved the reaction of 2-((4-Methoxyphenyl)ethynyl)aniline(cas: 157869-15-3).Reference of 2-((4-Methoxyphenyl)ethynyl)aniline

The Article related to alkynylphenyl isothiocyanate propargylamine cascade bicyclization copper, indolyl dihydrothiazole preparation mol crystal structure, aryl ketone indolylthiazolyl preparation mol crystal structure, copper cascade bicyclization catalyst and other aspects.Reference of 2-((4-Methoxyphenyl)ethynyl)aniline

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem