Tag: 100-200

Reference of Diethyl 2-methylmalonateIn 2021 ,《Catalytic reductive desymmetrization of malonic esters》 appeared in Nature Chemistry. The author of the article were Xu, Pengwei; Huang, Zhongxing. The article conveys some information:

Here, a dinuclear zinc complex with a tetradentate ligand could selectively hydrosilylate one of the carbonyls of malonic esters to give α-quaternary β-hydroxyesters I [R1 = Me, CH2F, allyl, etc.; R2 = Ph, 3-thienyl, 1-naphthyl, etc.] was reported, providing a promising alternative to the desym. hydrolysis using carboxylesterases. The asym. reduction features excellent enantiocontrol that could differentiate sterically similar substituents and high chemoselectivity toward the diester motif of substrates. Together with the versatile preparation of malonic ester substrates and post-reduction derivatization, the desym. reduction had enabled the synthesis of a diverse array of quaternary stereocenters with distinct structural features. After reading the article, we found that the author used Diethyl 2-methylmalonate(cas: 609-08-5Reference of Diethyl 2-methylmalonate)

Diethyl 2-methylmalonate(cas: 609-08-5) belongs to aliphatic hydrocarbons. Aliphatic hydrocarbons belong to the most abundant fraction in crude oil. Aliphatics molecules are linear or branched open-chain structures such as n-alkanes, isoalkanes, cycloalkanes (naphthenes), terpenes and steranes.Reference of Diethyl 2-methylmalonate

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

Quality Control of Ethyl 3-oxopentanoateIn 2020 ,《Design, synthesis, and insecticidal/acaricidal evaluation of novel pyrimidinamine derivatives containing phenyloxazole moiety》 appeared in Chemical Papers. The author of the article were Zhang, Ning; Huang, Ming-Zhi; Liu, Ai-Ping; Liu, Min-Hua; Li, Li-Zhong; Zhou, Chun-Ge; Ren, Ye-Guo; Ou, Xiao-Ming; Long, Chu-Yun; Sun, Jiong; Dang, Ming-Ming; Lan, Zhi-Li. The article conveys some information:

A series of novel pyrimidinamine derivatives containing phenyloxazole moiety I (R1 = H, 2-Cl, 4-CF3, etc.; R2 = Me, Et) was designed and synthesized, and their structures were characterized by 1H NMR, MS, and elemental analyses. The bioassay results displayed that some compounds exhibited remarkable insecticidal activities against Aphis fabae and Tetranychus cinnabarinus. Especially, I (R1 = 4-Me; R2 = Et) showed potent activity against A. fabae, superior to that of the com. insecticide, imidacloprid. In addition, I (R1 = 4-CF3; R2 = Et) showed potent activities against T. cinnabarinus, inferior to that of the com. insecticide spirotetramat. The structure-activity relationship study for the target compounds was also discussed. In the experiment, the researchers used Ethyl 3-oxopentanoate(cas: 4949-44-4Quality Control of Ethyl 3-oxopentanoate)

Ethyl 3-oxopentanoate(cas: 4949-44-4) belongs to ketone compounds. They are most widely used as solvents, especially in industries manufacturing explosives, lacquers, paints, and textiles. Ketones are also used in tanning, as preservatives, and in hydraulic fluids.Quality Control of Ethyl 3-oxopentanoate

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

In 2022,Hu, Jingcheng; Zeng, Li; Hu, Jiayu; Ma, Rui; Liu, Xue; Jiao, Ying; He, Haoyu; Chen, Siyu; Xu, Zhexi; Wang, Hongfei; Lei, Aiwen published an article in Organic Letters. The title of the article was 《Electrochemical Difunctionalization of Terminal Alkynes: Access to 1,4-Dicarbonyl Compounds》.Recommanded Product: 609-14-3 The author mentioned the following in the article:

Herein, a feasible electrosynthesis method to access 1,4-dicarbonyl compounds such as I [R = Ph, 4-MeC6H4, 2-thienyl, etc.; R1 = Me, OMe, OEt, Oi-Pr; R2 = Me; R3 = Me; R2R3 = (CH2)3, (CH2)4, (CH2)5] had been developed from simple alkynes and 1,3-dicarbonyl compounds When the undivided cell was combined with the constant current mode, aryl alkynes containing numerous medicinal motifs with 1,3-dicarbonyl esters or ketones reacted smoothly. External oxidant and catalyst-free conditions conformed to the requirements of green synthesis. After reading the article, we found that the author used Ethyl 2-methyl-3-oxobutanoate(cas: 609-14-3Recommanded Product: 609-14-3)

Ethyl 2-methyl-3-oxobutanoate(cas: 609-14-3) belongs to ketone compounds. Ketones are highly reactive, although less so than aldehydes, to which they are closely related. Much of their chemical activity results from the nature of the carbonyl group. Ketones readily undergo a wide variety of chemical reactions.Recommanded Product: 609-14-3

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

Das, Amrita; Chatani, Naoto published an article in 2021. The article was titled 《Rh(I)- and Rh(II)-catalyzed C-H alkylation of benzylamines with alkenes and its application in flow chemistry》, and you may find the article in Chemical Science.Electric Literature of C10H10O2 The information in the text is summarized as follows:

The Rh-catalyzed C-H alkylation of benzylamines I (R = H, Me, F, CF3, etc.; R1 = H, Me, Cl, CF3; R2 = H, OMe, Cl; RR1 = -CH=CH-CH=CH-) and N-(thiophen-2-ylmethyl)picolinamide with alkenes CH2=CHR3 (R3 = ethoxycarbonyl, [(9Z)-octadec-9-en-1-yloxy]carbonyl, 2,3,4,5,6-pentafluorophenyl, etc.) using a picolinamide derivative II and Et 3-(2-(picolinamidomethyl)thiophen-3-yl)propanoate as a directing group is reported. Both Rh(I) and Rh(II) complexes can be used as active catalysts for this transformation. In addition, a flow set up was designed to successfully mimic this process under flow conditions. Several examples are presented under flow conditions and it was confirmed that a flow process is advantageous over a batch process. Deuterium labeling experiments were performed to elucidate the mechanism of the reaction, and the results indicated a possible carbene mechanism for this C-H alkylation process. In the experimental materials used by the author, we found Benzyl acrylate(cas: 2495-35-4Electric Literature of C10H10O2)

Benzyl acrylate(cas: 2495-35-4) is a reagent that can be used in the preparation of 2-(Phosphonomethyl)pentanedioic Acid, a selective glutamate carboxypeptidase 2 (GCP-II) inhibitor. It can also be used in the preparation of high refractive index polyacrylates.Electric Literature of C10H10O2

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

Poitou, Xavier; Redon, Pascaline; Pons, Alexandre; Bruez, Emilie; Deliere, Laurent; Marchal, Axel; Cholet, Celine; Geny-Denis, Laurence; Darriet, Philippe published an article in 2021. The article was titled 《Methyl salicylate, a grape and wine chemical marker and sensory contributor in wines elaborated from grapes affected or not by cryptogamic diseases》, and you may find the article in Food Chemistry.Electric Literature of C8H8O3 The information in the text is summarized as follows:

Me salicylate (MeSA) is a plant metabolite that induces plant defense resistance and an odorous volatile compound presenting green nuances. This volatile compound was shown to be present in wine samples, sometimes at concentrations above its olfactory detection threshold. MeSA is localized in grapes, particularly in the skins and stems, and is extracted during red wine vinification. It was detected at the highest concentrations in wines of several grape varieties, made from grapes affected by cryptogamic diseases, namely downy mildew caused by Plasmopara viticola, and black rot caused by Guignardia bidwellii. It has also been detected in wines from vines affected by Esca, a Grapevine Trunk Disease. MeSA can also be considered to be a chem. marker in grapes and wine indicative of the level of development of several vine cryptogamic diseases. The results came from multiple reactions, including the reaction of Methyl Salicylate(cas: 119-36-8Electric Literature of C8H8O3)

Methyl Salicylate(cas: 119-36-8) is a natural herbivore-induced plant volatile. It is a naturally occurring product in trees, legumes, exotic plants, vegetables, berries, and the primary constituent of the oil of wintergreen.Methyl Salicylate is produced from salicylic acid.Electric Literature of C8H8O3

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

Umeda, Takehiro; Minakata, Satoshi published their research in RSC Advances in 2021. The article was titled 《A practical method for the aziridination of α,β-unsaturated carbonyl compounds with a simple carbamate utilizing sodium hypochlorite pentahydrate》.Product Details of 4248-19-5 The article contains the following contents:

The efficient formation of tert-Bu N-chloro-N-sodio-carbamate by the reaction of simple tert-Bu carbamate with sodium hypochlorite pentahydrate (NaOCl.5H2O) would be a practical and green method for the aziridination of α,β-unsaturated carbonyl compds RCH=CH2 [R = methoxycarbonyl, (3,5-dimethyl-1H-pyrazol-1-yl)carbonyl, (anthracen-9-ylmethoxy)carbonyl, etc.]. The process described herein is transition-metal free, all of the materials are com. available, the byproducts (NaCl and H2O) are environmentally benign and the reaction is stereoselective. The resulting aziridines I are potential precursors of amino acids. The experimental part of the paper was very detailed, including the reaction process of tert-Butyl carbamate(cas: 4248-19-5Product Details of 4248-19-5)

tert-Butyl carbamate(cas: 4248-19-5) belongs to anime. Amines can be classified according to the nature and number of substituents on nitrogen. Aliphatic amines contain only H and alkyl substituents. Aromatic amines have the nitrogen atom connected to an aromatic ring.Important amines include amino acids, biogenic amines, trimethylamine, and aniline. Inorganic derivatives of ammonia are also called amines, such as monochloramine (NClH2).Product Details of 4248-19-5

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

《Safety assessment of the process Carton Pack, based on Starlinger deCON technology, used to recycle post-consumer PET into food contact materials》 was written by Silano, Vittorio; Barat Baviera, Jose Manuel; Bolognesi, Claudia; Chesson, Andrew; Cocconcelli, Pier Sandro; Crebelli, Riccardo; Gott, David Michael; Grob, Konrad; Lambre, Claude; Mengelers, Marcel; Mortensen, Alicja; Riviere, Gilles; Steffensen, Inger-Lise; Tlustos, Christina; Van Loveren, Henk; Vernis, Laurence; Zorn, Holger; Dudler, Vincent; Milana, Maria Rosaria; Papaspyrides, Constantine; Tavares Pocas, Maria de Fatima; Lioupis, Alexandros; Lampi, Evgenia; EFSA Panel on Food Contact Materials, Enzymes and Processing Aids. HPLC of Formula: 119-36-8 And the article was included in EFSA Journal in 2020. The article conveys some information:

The EFSA Panel on Food Contact Materials, Enzymes and Processing Aids (CEP) assessed the safety of the recycling process Carton Pack (EU register number RECYC188), which uses the Starlinger deCON technol. The input material is hot washed and dried poly(ethylene terephthalate) (PET) flakes originating from collected post-consumer PET containers, e.g. bottles, including no more than 5% PET from non-food consumer applications. The flakes are preheated before being submitted to solid-state polycondensation (SSP) in a continuous reactor at high temperature under vacuum and gas flow. Having examined the challenge test provided, the Panel concluded that the preheating (step 2) and the decontamination in the continuous SSP reactor (step 3) are critical in determining the decontamination efficiency of the process. The operating parameters to control the performance of these critical steps are temperature, pressure, residence time and gas flow rate. It was demonstrated that this recycling process is able to ensure a level of migration of potential unknown contaminants into food below the conservatively modelled migration of 0.1μg/kg food. Therefore, the Panel concluded that the recycled PET obtained from this process is not considered to be of safety concern, when used at up to 100% for the manufacture of materials and articles for contact with all types of foodstuffs for long-term storage at room temperature, with or without hot-fill. Trays made of this recycled PET are not intended to be used in microwave and conventional ovens and such uses are not covered by this evaluation. In addition to this study using Methyl Salicylate, there are many other studies that have used Methyl Salicylate(cas: 119-36-8HPLC of Formula: 119-36-8) was used in this study.

Methyl Salicylate(cas: 119-36-8) is a natural herbivore-induced plant volatile. It is a naturally occurring product in trees, legumes, exotic plants, vegetables, berries, and the primary constituent of the oil of wintergreen.Methyl Salicylate is produced from salicylic acid.HPLC of Formula: 119-36-8

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

《Synthesis of N-H-Free 1,4-Dihydroisoquinoline-3(2H)-ones via Pd-Catalyzed C-H Olefination Using Polyfluorosulfinyl as the Auxiliary Group》 was written by Chen, Yu-Hao; Shao, Nan-Qi; Li, Chen; Wang, Dong-Hui. SDS of cas: 2495-35-4 And the article was included in Organic Letters in 2020. The article conveys some information:

A Pd(II)-catalyzed olefination of aryl C-H bonds with a self-cleaving 2-chlorotretafluoroethylsulfinyl (-SOCF2CF2Cl) auxiliary was developed. In the reaction mixture, the olefination products underwent in situ Michael addition and the subsequent expulsion of the auxiliary to provide the N-H-free 1,4-dihydroisoquinoline-3(2H)-one products. Mechanistic studies reveal that the auxiliary group is crucial for C-H activation, and Na2CO3 and an alc. solvent play key roles in facilitating the cleavage of the polyfluoroalkylsulfinyl auxiliary. The results came from multiple reactions, including the reaction of Benzyl acrylate(cas: 2495-35-4SDS of cas: 2495-35-4)

Benzyl acrylate(cas: 2495-35-4) is a reagent that can be used in the preparation of 2-(Phosphonomethyl)pentanedioic Acid, a selective glutamate carboxypeptidase 2 (GCP-II) inhibitor. It can also be used in the preparation of high refractive index polyacrylates.SDS of cas: 2495-35-4

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

《Photoredox Generation of Sulfonyl Radicals and Coupling with Electron Deficient Olefins》 was published in Organic Letters in 2020. These research results belong to Chen, Yiding; McNamara, Nicole; May, Oliver; Pillaiyar, Thanigaimalai; Blakemore, David C.; Ley, Steven V.. Application of 2495-35-4 The article mentions the following:

Various sulfone tetrazoles were activated via iridium photoredox catalysis in the presence of DMAP to gave dialkyl sulfones such as I [R1 = 4-FC6H4CH2CH2, 4-ClC6H4CH2, tetralin-2-yl, etc.; R2 = CN, C(O)OEt, C(O)O-Bn, etc., R3 = H, CH2C(O)OMe; R2R3 = CH2CH2OC(O); R4 = H, Me]. The presumed sulfone radical intermediates were trapped by a range of electron-deficient olefins in generally good to excellent yields. The results came from multiple reactions, including the reaction of Benzyl acrylate(cas: 2495-35-4Application of 2495-35-4)

Benzyl acrylate(cas: 2495-35-4) has been used in preparation of high refractive index polyacrylates. Benzyl acrylate is used in the preparation of heptanoic acid benzyl ester. It is used to prepare polybenzylacrylate using azobisisobutyronitrile as initiator.Application of 2495-35-4

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

《Highly Enantioselective Construction of Fully Substituted Stereocenters Enabled by In Situ Phosphonium-Containing Organocatalysis》 was published in ACS Catalysis in 2020. These research results belong to Zhang, Hongkui; Jiang, Chunhui; Tan, Jian-Ping; Hu, Hui-Lin; Chen, Yayun; Ren, Xiaoyu; Zhang, Hong-Su; Wang, Tianli. Recommanded Product: Ethyl 3-oxopentanoate The article mentions the following:

We present, herein, an important and practical class of bifunctional in situ phosphonium-containing organocatalysis and its initial application in highly efficient and enantioselective construction of N-containing fully substituted stereocenters through an asym. decarboxylative transformation between cyclic ketimines and β-keto acids. With this catalytic protocol, a variety of optically active cyclic tertiary amine derivatives were readily synthesized in high yields with excellent enantioselectivities (99.0 to >99.9% ee) under very low catalyst loading (0.5 mol %). The success of gram-level preparation and synthetic transformations proves the potential of this catalytic strategy for practical applications. Mechanistic investigation, including control experiments, in situ NMR anal., and ESI-HRMS characterization of intermediates, provides insights into the mechanism. After reading the article, we found that the author used Ethyl 3-oxopentanoate(cas: 4949-44-4Recommanded Product: Ethyl 3-oxopentanoate)

Ethyl 3-oxopentanoate(cas: 4949-44-4) belongs to ketone compounds. Ketones are highly reactive, although less so than aldehydes, to which they are closely related. Much of their chemical activity results from the nature of the carbonyl group. Ketones readily undergo a wide variety of chemical reactions.Recommanded Product: Ethyl 3-oxopentanoate

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