Tag: 100-200

《Construction of axial chirality via palladium/chiral norbornene cooperative catalysis》 was published in Nature Catalysis in 2020. These research results belong to Liu, Ze-Shui; Hua, Yu; Gao, Qianwen; Ma, Yuanyuan; Tang, Hua; Shang, Yong; Cheng, Hong-Gang; Zhou, Qianghui. Name: Benzyl acrylate The article mentions the following:

Herein, a general and modular platform technol. for the construction of axial chirality via palladium/chiral norbornene cooperative catalysis I (R = Me, Et) was reported. It is a three-component cascade process that involves widely available aryl iodides R1I (R1 = 2-methylphenyl, 5,6,7,8-tetrahydronaphthalen-1-yl, pyren-1-yl, 2-methoxypyridin-3-yl, etc.), 2,6-substituted aryl bromides 2-R2-3-R3-4-R4-5-R5-6-R6-C6Br [R2 = Cl, (tert-butoxy)carbonyl, (pyrrolidin-1-yl)carbonyl, etc.; R3 = H; R4 = H, Cl, Me; R5 = H, Me; R6 = Me, cyclohexanecarbonyl, benzoyl, etc.; R2R3 = -CH=CH-CH=CH-] and olefins such as t-Bu acrylate, styrene, (triisopropylsilyl)acetylene, methylboronic acid, etc. as the reactants. A wide variety of substrates bearing an assortment of functional groups (88 examples) is compatible with this method. Other features include a distinct stereoinduction model, excellent enantioselectivities, step economy and scalability. This method is also amenable for the synthesis of chiral fluorenols II [R7 = Me, Cl; R8 = H; R7R8 = -CH=CH-CH=CH-; R9 = Me, Et, t-Bu, cyclopropyl, cyclohexyl, Ph; R10 = H, F, NO2, Br, methoxycarbonyl, N-methylcarbamoyl; R11 = H, Cl, methoxycarbonyl; R12 = Me, Et, F, OMe, OBn, [(tert-butyldimethylsilyl)oxy]methyl; R11R12 = -CH=CH-CH=CH-] and (R)-13-methyl-13H-benzo[6,7]indeno[2,1-a]pyren-13-ol, etc. through axial-to-central chirality transfer in high stereochem. fidelity. It was anticipated that this work will have broad synthetic utilities in chiral ligands and catalyst-design for asym. catalysis. In the experiment, the researchers used Benzyl acrylate(cas: 2495-35-4Name: Benzyl acrylate)

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.Name: Benzyl acrylate

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

《Continuous-Flow Amide and Ester Reductions Using Neat Borane Dimethylsulfide Complex》 was published in ChemSusChem in 2020. These research results belong to Oetvoes, Sandor B.; Kappe, C. Oliver. Recommanded Product: Methyl 4-fluorobenzoate The article mentions the following:

A simple process was developed in which neat borane dimethylsulfide complex (BH3·DMS) was used to reduce various esters RC(O)OR1 (R = C6H5, cyclohexyl, 2-naphthyl, etc.; R1 = CH3, C2H5, C6H5, CH2C6H5) and amides R2C(O)NR3R4 (R2 = H, Me, Ph; R3 = C6H5, 1-naphthyl, CH2C6H5, etc.; R4 = H, Me, Ph) under continuous-flow conditions. Taking advantage of the solvent-free nature of the com. available borane reagent, high substrate concentrations were realized, allowing outstanding productivity and a significant reduction in E-factors. In addition, with carefully optimized short residence times, the corresponding alcs. RCH2OH and amines R2CH2NR3R4 were obtained in high selectivity and high yields. The synthetic utility of the inexpensive and easily implemented flow protocol was further corroborated by multigram-scale syntheses of pharmaceutically relevant products. Owing to its beneficial features, including low solvent and reducing agent consumption, high selectivity, simplicity, and inherent scalability, the present process demonstrates fewer environmental concerns than most typical batch reductions using metal hydrides as reducing agents.Methyl 4-fluorobenzoate(cas: 403-33-8Recommanded Product: Methyl 4-fluorobenzoate) was used in this study.

Methyl 4-fluorobenzoate(cas: 403-33-8) is an organic fluorinated building block used for the synthesis of various pharmaceutical compounds. It can be used for the preparation of Blonanserin.Recommanded Product: Methyl 4-fluorobenzoate

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

The author of 《Rhodium catalyzed template-assisted distal para-C-H olefination》 were Dutta, Uttam; Maiti, Sudip; Pimparkar, Sandeep; Maiti, Siddhartha; Gahan, Lawrence R.; Krenske, Elizabeth H.; Lupton, David W.; Maiti, Debabrata. And the article was published in Chemical Science in 2019. Name: Benzyl acrylate The author mentioned the following in the article:

Rhodium catalysis were extensively used for ortho-C-H functionalization reactions, and successfully extended to meta-C-H functionalization. Its application to para-C-H activation remained an unmet challenge. Herein The first example of such a reaction, with the Rh-catalyzed para-C-H olefination of arenes was disclosed to obtained para-olefinated arenes e.g., I. The use of a Si-linked cyanobiphenyl unit as a traceless directing group leads to highly para-selective arene-olefin couplings. In the experiment, the researchers used Benzyl acrylate(cas: 2495-35-4Name: Benzyl acrylate)

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.Name: Benzyl acrylate

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

The author of 《3D QSAR-based design and liquid phase combinatorial synthesis of 1,2-disubstituted benzimidazole-5-carboxylic acid and 3-substituted-5H-benzimidazo[1,2-d][1,4]benzodiazepin-6(7H)-one derivatives as anti-mycobacterial agents》 were Sitwala, Nikum D.; Vyas, Vivek K.; Gedia, Piyush; Patel, Kinjal; Bouzeyen, Rania; Kidwai, Saqib; Singh, Ramandeep; Ghate, Manjunath D.. And the article was published in MedChemComm in 2019. Reference of Ethyl oxalyl monochloride The author mentioned the following in the article:

A 3D QSAR study was performed for the design of novel substituted benzimidazole derivatives as anti-mycobacterial agents. The anti-tubercular activity of the designed compounds was predicted using the generated 3D QSAR models. The designed compounds which showed better activity were synthesized as I [R = pyridin-3-yl, 3,4-(MeO)2C6H3, 4-BrC6H4, etc.] and II [R1 = H, PhCO, 4-MeOC6H4SO2, etc.] using the liquid phase combinatorial approach using a soluble polymer assisted support (PEG5000). The compounds were characterized by 1H-NMR, 13C-NMR, FTIR and mass spectrometry. HPLC anal. was carried out to evaluate the purity of the compounds It was observed that the synthesized compounds inhibited the growth of intracellular M. tuberculosis H37Rv in a bactericidal manner. The most active compound, II [R1 = H] displayed an MIC value of 0.0975 μM against the Mtb H37Rv strain in liquid cultures. The lead compound was also able to inhibit the growth of intracellular mycobacteria in THP-1 macrophages. In the experiment, the researchers used Ethyl oxalyl monochloride(cas: 4755-77-5Reference of Ethyl oxalyl monochloride)

Ethyl oxalyl monochloride(cas: 4755-77-5) belongs to acyl chlorides. Lacking the ability to form hydrogen bonds, acyl chlorides have lower boiling and melting points than similar carboxylic acids. For example, acetic acid boils at 118 °C, whereas acetyl chloride boils at 51 °C. Like most carbonyl compounds, infrared spectroscopy reveals a band near 1750 cm−1.Reference of Ethyl oxalyl monochloride

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

The author of 《Structure-Activity Relationships of Au/Al2O3 Catalyst for the Selective Oxidative Esterification of 1,3-Propanediol and Methanol》 were Zhao, Guoming; Gao, Enyuan; Wan, Qiaoqiao; Liu, Qing; Liang, Junjie; Qiao, Yingyun; Zhao, Guangzhen; Tian, Yuanyu. And the article was published in ChemistrySelect in 2019. Application of 6149-41-3 The author mentioned the following in the article:

1.5 Weight % Au/Al2O3 catalysts were prepared using the deposition-precipitation or colloid-deposition method and calcined at different temperatures for the selective oxidative esterification reaction of 1,3-propanediol and methanol to form Me 3-hydroxypropionate (3-HPM). The catalysts were characterized by nitrogen adsorption, transmission electron microscopy (TEM), X-ray diffraction (XRD), UV-Vis diffuse reflectance spectroscopy, X-ray photoelectron spectra (XPS), CO2 temperature-programmed desorption (CO2-TPD) and NH3 temperature-programmed desorption (NH3-TPD). The effect of the calcination temperature of the catalyst prepared by the deposition-precipitation method on the catalytic performance for the selective oxidative esterification of 1,3-propanediol was studied. The results showed that the conversion of 1,3-propanediol and the selectivity of 3-HPM increased at first and then decreased with the increase of the calcination temperature of catalyst. The highest conversion of 1,3-propanediol and selectivity of 3-HPM at the optimal calcination temperature of 350°C were 92.0% and 88.5%, resp. Considering the effects of preparation method and calcination temperature, it could be concluded that the metallic Au nanoparticles with appropriate particle size in coordination with the suitable amount of weak and middle acid and base sites, were favorable to the oxidative esterification of 1,3-propanediol and methanol to 3-HPM. Moreover, we found that the 1.5 weight % Au/Al2O3 catalyst could be effectively recovered without obvious decline of the catalytic properties. In the experiment, the researchers used many compounds, for example, Methyl 3-hydroxypropanoate(cas: 6149-41-3Application of 6149-41-3)

Methyl 3-hydroxypropanoate(cas: 6149-41-3) belongs to esters with low molecular weight are commonly used as fragrances and found in essential oils and pheromones. Their flexibility and low polarity is manifested in their physical properties; they tend to be less rigid (lower melting point) and more volatile (lower boiling point) than the corresponding amides. Application of 6149-41-3

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

In 2019,Organic Letters included an article by Gao, Mingchun; Gan, Yuansheng; Xu, Bin. Related Products of 2495-35-4. The article was titled 《From Alkenes to Isoxazolines via Copper-Mediated Alkene Cleavage and Dipolar Cycloaddition》. The information in the text is summarized as follows:

An unprecedented copper-mediated anion transformation is reported, along with selective C=C double bond cleavage and dipolar cycloaddition reaction from simple alkenes and inexpensive copper nitrate. Various transformations demonstrate the generality of this method. Further mechanistic investigation indicates a novel ionic pathway for alkene cleavage and highlights the coeffect of iodide and boric acid as additives on the inhibition of well-documented competitive nitration byproducts. In the experiment, the researchers used Benzyl acrylate(cas: 2495-35-4Related Products 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.Related Products of 2495-35-4

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

In 2019,Organic Letters included an article by Haun, Graham; Paneque, Alyson N.; Almond, David W.; Austin, Brooke E.; Moura-Letts, Gustavo. Name: N-tert-Butoxycarbonylhydroxylamine. The article was titled 《Synthesis of Chromenoisoxazolidines from Substituted Salicylic Nitrones via Visible-Light Photocatalysis》. The information in the text is summarized as follows:

This effort reports the first redox-neutral visible-light photocatalytic intramol. dipolar cycloaddition for the diastereoselective synthesis of chromenoisoxazolidines. Alkenylphenyl nitrones with a diverse substitution pattern on the aromatic ring and the alkenyl substituent undergo visible-light-promoted cycloadditions in the presence of catalytic amounts of Ru(bpy)3Cl2 in high yields and selectivities. The proposed redox-neutral pathway is the predominant photoredox mechanism for this transformation. In the experimental materials used by the author, we found N-tert-Butoxycarbonylhydroxylamine(cas: 36016-38-3Name: N-tert-Butoxycarbonylhydroxylamine)

N-tert-Butoxycarbonylhydroxylamine(cas: 36016-38-3) belongs to anime. Hydrogen peroxide (H2O2) and peroxy acids generally add an oxygen atom to the nitrogen of amines. With primary amines, this step is normally followed by further oxidation, leading to nitroso compounds, RNO, or nitro compounds, RNO2. Secondary amines are converted to hydroxylamines, R2NOH, and tertiary amines to amine oxides, R3NO.Name: N-tert-Butoxycarbonylhydroxylamine

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

In 2019,Organic Letters included an article by Tsuji, Hiroaki; Hashimoto, Keisuke; Kawatsura, Motoi. Name: Diethyl 2-methylmalonate. The article was titled 《Nickel-Catalyzed Benzylic Substitution of Benzyl Esters with Malonates as a Soft Carbon Nucleophile》. The information in the text is summarized as follows:

The nickel-catalyzed benzylic substitution of benzyl alc. derivatives with a soft carbon nucleophile is extremely rare compared to that with a hard carbon nucleophile. The nickel-catalyzed benzylic substitution of benzyl esters with malonates as a soft carbon nucleophile is achieved. Primary and secondary benzyl 2,3,4,5,6-pentafluorobenzoates as well as a wide variety of malonate derivatives were well tolerated in the nickel-catalyzed reaction, providing the corresponding alkylation products in 46-86% yields (34 examples). Addnl., a possible reaction mechanism that would underwent via the η1- and η3-benzylnickel intermediates is proposed. After reading the article, we found that the author used Diethyl 2-methylmalonate(cas: 609-08-5Name: 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.Name: Diethyl 2-methylmalonate

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

In 2017,Zheng, Yi-Wen; Ye, Pan; Chen, Bin; Meng, Qing-Yuan; Feng, Ke; Wang, Wenguang; Wu, Li-Zhu; Tung, Chen-Ho published 《Benzene C-H Etherification via Photocatalytic Hydrogen-Evolution Cross-Coupling Reaction》.Organic Letters published the findings.Recommanded Product: Methyl 3-hydroxypropanoate The information in the text is summarized as follows:

Aryl ethers can be constructed from the direct coupling between the benzene C-H bond and the alc. O-H bond with the evolution of hydrogen via the synergistic merger of photocatalysis and cobalt catalysis. Utilizing the dual catalyst system consisting of 3-cyano-1-methylquinolinum photocatalyst and cobaloxime, intermol. etherification of arenes with various alcs. and intramol. alkoxylation of 3-phenylpropanols with formation of chromanes are accomplished. These reactions proceed at remarkably mild conditions, and the sole byproduct is equivalent hydrogen gas. This methodol. was applied to the de novo synthesis of butoxycaine (I) starting fro benzene. In the part of experimental materials, we found many familiar compounds, such as Methyl 3-hydroxypropanoate(cas: 6149-41-3Recommanded Product: Methyl 3-hydroxypropanoate)

Methyl 3-hydroxypropanoate(cas: 6149-41-3) belongs to esters with low molecular weight are commonly used as fragrances and found in essential oils and pheromones. Their flexibility and low polarity is manifested in their physical properties; they tend to be less rigid (lower melting point) and more volatile (lower boiling point) than the corresponding amides. Recommanded Product: Methyl 3-hydroxypropanoate

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

The author of 《Catalyst- and additive-free sunlight-induced autoxidation of aldehydes to carboxylic acids》 were Shi, Hongwei; Li, Jun; Wang, Tao; Rudolph, Matthias; Hashmi, A. Stephen K.. And the article was published in Green Chemistry in 2022. Computed Properties of C9H8O4 The author mentioned the following in the article:

A catalyst- and additive-free sunlight-induced strategy for autoxidation of a wide range of aldehydes RCHO (R = Bu, cyclohexyl, Ph, pyridin-3-yl, etc.) to carboxylic acids RC(O)OH is described for the first time. In this oxidation system, air serves as the source of oxygen and sunlight as the light source, and the system includes the advantages of green, highly atom-efficient, and low-cost synthesis. This method was easily applied even at gram scale. The reaction proceeds smoothly even at lower temperature and in natural light. The experimental process involved the reaction of 3-(Methoxycarbonyl)benzoic acid(cas: 1877-71-0Computed Properties of C9H8O4)

3-(Methoxycarbonyl)benzoic acid(cas: 1877-71-0) belongs to esters. They are important in biology, being one of the main classes of lipids and comprising the bulk of animal fats and vegetable oils.Esters typically have a pleasant smell; those of low molecular weight are commonly used as fragrances and are found in essential oils and pheromones.Computed Properties of C9H8O4

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