Tag: 100-200

Delamare, Aline; Naulet, Guillaume; Kauffmann, Brice; Guichard, Gilles; Compain, Guillaume published an article in 2022, the title of the article was Hexafluoroisobutylation of enolates through a tandem elimination/allylic shift/hydrofluorination reaction.Recommanded Product: 517-23-7 And the article contains the following content:

The first general method to introduce the hexafluoroisobutyl group into ketoesters, malonates, 1,3-diketones, Schiff base esters and malononitrile C(R)(R1)(R2)CH2CH(CF3)2 [R = C(O)Me, C(O)OEt, C(O)C6H5, etc.; R1 = C(O)OEt, C(O)Me, CN, etc.; R2 = Me, i-Pr, Bn, etc.] was reported. The reaction occurs through an elimination/allylic shift/hydrofluorination cascade process which efficiently overcomes the usual fluoride β-elimination observed with α-CF3-vinyl groups. The alkali metal bases, a pentafluorinated alkene is obtained predominantly, whereas the use of tetrabutylammonium fluoride (TBAF) allows hydrofluorination to occur. This tandem process represents a conceptually new pathway to synthesize bis-trifluoromethylated compounds This methodol. was applied to the multigram-scale synthesis of enantiopure (S)-5,5,5,5′,5′,5′-hexafluoroleucine. The experimental process involved the reaction of 3-Acetyldihydrofuran-2(3H)-one(cas: 517-23-7).Recommanded Product: 517-23-7

The Article related to hexafluoisobutyl ester malononitrile preparation, enolate bromomethyl hexafluoropropane tandem hexafluoroisobutylation elimination hydrofluorination reaction, General Organic Chemistry: Synthetic Methods and other aspects.Recommanded Product: 517-23-7

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

Delamare, Aline; Naulet, Guillaume; Kauffmann, Brice; Guichard, Gilles; Compain, Guillaume published an article in 2022, the title of the article was Hexafluoroisobutylation of enolates through a tandem elimination/allylic shift/hydrofluorination reaction.COA of Formula: C7H10O3 And the article contains the following content:

The first general method to introduce the hexafluoroisobutyl group into ketoesters, malonates, 1,3-diketones, Schiff base esters and malononitrile C(R)(R1)(R2)CH2CH(CF3)2 [R = C(O)Me, C(O)OEt, C(O)C6H5, etc.; R1 = C(O)OEt, C(O)Me, CN, etc.; R2 = Me, i-Pr, Bn, etc.] was reported. The reaction occurs through an elimination/allylic shift/hydrofluorination cascade process which efficiently overcomes the usual fluoride β-elimination observed with α-CF3-vinyl groups. The alkali metal bases, a pentafluorinated alkene is obtained predominantly, whereas the use of tetrabutylammonium fluoride (TBAF) allows hydrofluorination to occur. This tandem process represents a conceptually new pathway to synthesize bis-trifluoromethylated compounds This methodol. was applied to the multigram-scale synthesis of enantiopure (S)-5,5,5,5′,5′,5′-hexafluoroleucine. The experimental process involved the reaction of Methyl 2-cyclopentanonecarboxylate(cas: 10472-24-9).COA of Formula: C7H10O3

The Article related to hexafluoisobutyl ester malononitrile preparation, enolate bromomethyl hexafluoropropane tandem hexafluoroisobutylation elimination hydrofluorination reaction, General Organic Chemistry: Synthetic Methods and other aspects.COA of Formula: C7H10O3

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

On September 14, 2020, Uyanik, Muhammet; Sahara, Naoto; Tsukahara, Mayuko; Hattori, Yuhei; Ishihara, Kazuaki published an article.Product Details of 10472-24-9 The title of the article was Chemo- and Enantioselective Oxidative α-Azidation of Carbonyl Compounds. And the article contained the following:

The authors report high-performance I+/H2O2 catalysis for the oxidative or decarboxylative oxidative α-azidation of carbonyl compounds by using sodium azide under biphasic neutral phase-transfer conditions. To induce higher reactivity especially for the α-azidation of 1,3-dicarbonyl compounds, the authors designed a structurally compact isoindoline-derived quaternary ammonium iodide catalyst bearing electron-withdrawing groups. The nonproductive decomposition pathways of I+/H2O2 catalysis could be suppressed using a catalytic amount of a radical-trapping agent. This oxidative coupling tolerates a variety of functional groups and could be readily applied to the late-stage α-azidation of structurally diverse complex mols. Moreover, the authors achieved the enantioselective α-azidation of 1,3-dicarbonyl compounds as the first successful example of enantioselective intermol. oxidative coupling with a chiral hypoiodite catalyst. The experimental process involved the reaction of Methyl 2-cyclopentanonecarboxylate(cas: 10472-24-9).Product Details of 10472-24-9

The Article related to chemo enantioselective oxidative alpha azidation catalyst carbonyl, azides, chemoselectivity, enantioselectivity, hypoiodite catalysis, oxidative coupling, General Organic Chemistry: Synthetic Methods and other aspects.Product Details of 10472-24-9

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

Li, Xin; He, Songtao; Song, Qiuling published an article in 2020, the title of the article was Enantio- and diastereoselective diarylmethylation of 1,3-dicarbonyl compounds.Category: esters-buliding-blocks And the article contains the following content:

A Cu-catalyzed enantio- and diastereoselective diarylmethylation of 1,3-dicarbonyl compounds RC(O)CH(R1)C(O)R2 (R = Et, 4-methoxyphenyl, cyclohexyl, thiophen-2-yl, etc.; R1 = H, Me; R2 = Me, OMe, OEt, O(i-Pr); RR1 = -(CH2)3-, -(CH2)4-, -(CH2)2O-) and Me 1-oxo-2-indancarboxylate is described. It is a successful example of constructing all-carbon quaternary stereocenters from 3°C-H nucleophiles, a challenging topic in synthetic chem. In the present work, two contiguous stereocenters I (R3 = R4 = Me, t-Bu, i-Pr, TMS, Ph; R3 = Me, R4 = t-Bu; Ar = naphthalen-2-yl, 1-benzofuran-2-yl, 2,3-dihydro-1,4-benzodioxin-6-yl, thiophen-2-yl, etc.) are constructed with high levels of stereoselectivity and atom economy. The broad scope of 1,3-dicarbonyl nucleophiles and the tolerance of a wide range of functional groups make this protocol of great importance in the synthesis of chiral diarylmethane compounds I. The experimental process involved the reaction of Methyl 2-cyclopentanonecarboxylate(cas: 10472-24-9).Category: esters-buliding-blocks

The Article related to chiral diarylmethane preparation enantioselective diastereoselective, dicarbonyl compound quinone methide diarylmethylation copper indenooxazole catalyst, General Organic Chemistry: Synthetic Methods and other aspects.Category: esters-buliding-blocks

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

Li, Xin; He, Songtao; Song, Qiuling published an article in 2020, the title of the article was Enantio- and diastereoselective diarylmethylation of 1,3-dicarbonyl compounds.Computed Properties of 517-23-7 And the article contains the following content:

A Cu-catalyzed enantio- and diastereoselective diarylmethylation of 1,3-dicarbonyl compounds RC(O)CH(R1)C(O)R2 (R = Et, 4-methoxyphenyl, cyclohexyl, thiophen-2-yl, etc.; R1 = H, Me; R2 = Me, OMe, OEt, O(i-Pr); RR1 = -(CH2)3-, -(CH2)4-, -(CH2)2O-) and Me 1-oxo-2-indancarboxylate is described. It is a successful example of constructing all-carbon quaternary stereocenters from 3°C-H nucleophiles, a challenging topic in synthetic chem. In the present work, two contiguous stereocenters I (R3 = R4 = Me, t-Bu, i-Pr, TMS, Ph; R3 = Me, R4 = t-Bu; Ar = naphthalen-2-yl, 1-benzofuran-2-yl, 2,3-dihydro-1,4-benzodioxin-6-yl, thiophen-2-yl, etc.) are constructed with high levels of stereoselectivity and atom economy. The broad scope of 1,3-dicarbonyl nucleophiles and the tolerance of a wide range of functional groups make this protocol of great importance in the synthesis of chiral diarylmethane compounds I. The experimental process involved the reaction of 3-Acetyldihydrofuran-2(3H)-one(cas: 517-23-7).Computed Properties of 517-23-7

The Article related to chiral diarylmethane preparation enantioselective diastereoselective, dicarbonyl compound quinone methide diarylmethylation copper indenooxazole catalyst, General Organic Chemistry: Synthetic Methods and other aspects.Computed Properties of 517-23-7

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

On September 22, 2022, Ren, Cheng; Ji, Guanghao; Li, Xiankai; Zhang, Jing published an article.Name: Methyl 2-cyclopentanonecarboxylate The title of the article was Direct Synthesis of Adipic Esters and Adiponitrile via Photoassisted Cobalt-Catalyzed Alkene Hydrodimerization. And the article contained the following:

A cobalt-catalyzed tail-to-tail hydrodimerization of activated alkenes CH2=CHR (R = C(O)2Me, C(O)Ph, C(O)NHPh, etc.) driven by a visible-light photoredox catalysis at ambient temperature, which is applicable to both adipates R(CH2)4R (R = C(O)2Me, C(O)2Ph, C(O)2CH2Ph, etc.) and adiponitrile synthesis from potentially renewable feedstocks has been described. This protocol utilizes half equivalent of hantzsch ester as a recyclable two-electron and two-proton donor with the assistance of catalytic amount of base as a proton shuttle, and has been shown to be highly regioselective and efficient for hydrodimerizing various activated alkenes to 1,4-difunctionalized butane derivatives The experimental process involved the reaction of Methyl 2-cyclopentanonecarboxylate(cas: 10472-24-9).Name: Methyl 2-cyclopentanonecarboxylate

The Article related to adipic ester preparation regioselective, alkene hydrodimerization cobalt photocatalyst, adipate, adiponitrile, cobalt, hydrodimerization, photochemistry, General Organic Chemistry: Synthetic Methods and other aspects.Name: Methyl 2-cyclopentanonecarboxylate

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

Zhao, Qichao; Twu, Pamela; Anderson, Jared L. published an article in 2012, the title of the article was A rapid analytical method for monitoring the enantiomeric purity of chiral molecules synthesized in ionic liquid solvents.Category: esters-buliding-blocks And the article contains the following content:

Ionic liquids (ILs) were widely used as reaction solvents in asym. synthesis due to their interesting phys. and chem. properties. However, monitoring reactant-to-product conversion and the enantiopurity of formed stereoisomers often involves a tedious extraction step before chromatog. anal. A rapid and sensitive sampling method using headspace solid-phase microextraction (SPME) coupled to chiral gas chromatog. was developed for the online anal. of chiral mols. in the IL solvent. Three different SPME sorbent coatings, polydimethylsiloxane, polyacrylate, and a polymeric ionic liquid-based fiber, were examined The anal. performance of the developed method was evaluated in terms of reproducibility, slope of calibration curve, linear range, calibration linearity, and the determination of detection limits. The SPME method was successfully applied in the determination of enantiomeric excess from selected mixtures of chiral mols. A preliminary study was performed using an on-fiber derivatization approach revealing that the stereoisomers extracted by the SPME fiber can be efficiently derivatized using a short on-fiber derivatization step. The developed SPME method eliminates the need of sequestering the reaction, separating the compounds of interest from the IL solvent, and the addition of a derivatizing reagent. Chirality, 2012. © 2012 Wiley Periodicals, Inc. The experimental process involved the reaction of (R)-Methyl 3-hydroxybutanoate(cas: 3976-69-0).Category: esters-buliding-blocks

The Article related to enantiomeric purity monitoring chiral mol synthesis ionic liquid solvent, headspace solid phase microextraction gc enantiomeric purity monitoring, Organic Analytical Chemistry: Determinations and other aspects.Category: esters-buliding-blocks

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

On July 23, 2020, Tanemura, Kiyoshi; Rohand, Taoufik published an article.Application of 10472-24-9 The title of the article was Silica gel-mediated catalyst-free and solvent-free Michael addition of 1,3-dicarbonyl compounds to highly toxic methyl vinyl ketone without volatilization. And the article contained the following:

Silica gel-mediated Michael addition of 1,3-dicarbonyl compounds to Me vinyl ketone (MVK) and Et vinyl ketone (EVK) was carried out to give the corresponding adducts in quite excellent yields. The reactions could be carried out without any catalysts and solvents. In addition, highly toxic MVK and EVK could be employed without significant volatilization. Silica gel could be recycled five times without the decrease of the yields. The experimental process involved the reaction of Methyl 2-cyclopentanonecarboxylate(cas: 10472-24-9).Application of 10472-24-9

The Article related to dicarbonyl compound methyl vinyl ketone silica gel michael addition, ethyl vinyl ketone dicarbonyl compound silica gel michael addition, General Organic Chemistry: Synthetic Methods and other aspects.Application of 10472-24-9

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

On July 23, 2020, Tanemura, Kiyoshi; Rohand, Taoufik published an article.Name: 3-Acetyldihydrofuran-2(3H)-one The title of the article was Silica gel-mediated catalyst-free and solvent-free Michael addition of 1,3-dicarbonyl compounds to highly toxic methyl vinyl ketone without volatilization. And the article contained the following:

Silica gel-mediated Michael addition of 1,3-dicarbonyl compounds to Me vinyl ketone (MVK) and Et vinyl ketone (EVK) was carried out to give the corresponding adducts in quite excellent yields. The reactions could be carried out without any catalysts and solvents. In addition, highly toxic MVK and EVK could be employed without significant volatilization. Silica gel could be recycled five times without the decrease of the yields. The experimental process involved the reaction of 3-Acetyldihydrofuran-2(3H)-one(cas: 517-23-7).Name: 3-Acetyldihydrofuran-2(3H)-one

The Article related to dicarbonyl compound methyl vinyl ketone silica gel michael addition, ethyl vinyl ketone dicarbonyl compound silica gel michael addition, General Organic Chemistry: Synthetic Methods and other aspects.Name: 3-Acetyldihydrofuran-2(3H)-one

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

On September 6, 2019, Fan, Lian-Feng; Wang, Pu-Sheng; Gong, Liu-Zhu published an article.SDS of cas: 10472-24-9 The title of the article was Monodentate Phosphorus Ligand-Enabled General Palladium-Catalyzed Allylic C-H Alkylation of Terminal Alkenes. And the article contained the following:

Monodentate phosphorus ligands have been found to enable the palladium-catalyzed allylic C-H alkylation reaction of terminal alkenes with a wide variety of carbon nucleophiles. Moreover, an asym. allylic C-H alkylation of terminal alkenes with pyrazol-5-ones has been established in the presence of chiral phosphoramidite ligand and chiral phosphoric acid as co-catalyst. Mechanistic studies suggest that a ternary Pd(0) complex, coordinated with a monodentate phosphorus ligand, benzoquinone, and alkene, is most likely to be an active species. The experimental process involved the reaction of Methyl 2-cyclopentanonecarboxylate(cas: 10472-24-9).SDS of cas: 10472-24-9

The Article related to monodentate phosphorus ligand palladium catalyst allylic alkylation terminal alkene, regioselective stereoselective allylic alkylation, General Organic Chemistry: Synthetic Methods and other aspects.SDS of cas: 10472-24-9

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