Category: esters-buliding-blocks

Nishimura, Yoshio; Kikuchi, Hidetomo; Kubo, Takanori; Gokurakuji, Yuki; Nakamura, Yuri; Arai, Rie; Yuan, Bo; Sunaga, Katsuyoshi; Cho, Hidetsura published an article in Tetrahedron Letters. The title of the article was 《Synthesis of 6-unsubstituted 2-oxo, 2-thioxo, and 2-amino-3,4-dihydropyrimidines and their antiproliferative effect on HL-60 cells》.Electric Literature of C7H13NO2 The author mentioned the following in the article:

A general and efficient synthetic method for 6-unsubstituted 3,4-dihydropyrimidin-2(1H)-thiones and -ones I (R = H, C6H5, 4-ClC6H4, etc., X = S, O) has been developed. In three-component reactions, the reactivity of reagents serving as the C5-C6 fragment of the dihydropyrimidine ring was compared. The reaction of thiourea or urea, aldehydes RCHO, and Et 3-(dimethylamino)acrylate in the presence of a catalytic amount of AlCl3 by smooth heating proceeds to give I in high yields. Synthetic novelty of the protocol are as follows: (1) Lewis acid-mediated reaction, (2) good to high yields, and (3) broad scope as for aldehydes and ureas. Hitherto unavailable 6-unsubstituted 2-aminodihydropyridimidines II (R = n-Pr, Ph) have been obtained from the 2-thioxo derivative I (X = S) by a stepwise method involving substitution reaction with the amine at the 2-position. The 6-unsubstituted compounds I and 6-Me derivatives III (R = cyclohexyl, n-Pr) were assessed for their antiproliferative effect on the human promyelocytic leukemia cell line, HL-60. The 4-propyl-6-Me derivative III (R = n-Pr) showed relatively strong activity with the IC50 value of 952 nM. The experimental part of the paper was very detailed, including the reaction process of Ethyl 3-(dimethylamino)acrylate(cas: 924-99-2Electric Literature of C7H13NO2)

Ethyl 3-(dimethylamino)acrylate(cas: 924-99-2) belongs to anime. Aniline, ethanolamines, and several other amines are major industrial commodities used in making rubber, dyes, pharmaceuticals, and synthetic resins and fibres and for a host of other applications. Most of the numerous methods for the preparation of amines may be broadly divided into two groups: (1) chemical reduction (replacement of oxygen with hydrogen atoms in the molecule) of members of several other classes of organic nitrogen compounds and (2) reactions of ammonia or amines with organic compounds.Electric Literature of C7H13NO2

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

In 2022,Organic Chemistry Frontiers included an article by Zhou, You; Wang, Li-Sheng; Lei, Shuang-Gui; Gao, Yun-Xiang; Ma, Jin-Tian; Yu, Zhi-Cheng; Wu, Yan-Dong; Wu, An-Xin. Related Products of 924-99-2. The article was titled 《I2-Promoted site-selective C-C bond cleavage of aryl methyl ketones as C1 synthons for constructing 5-acyl-1H-pyrazolo[3,4-b]pyridines》. The information in the text is summarized as follows:

A novel iodine promoted [1 + 3 + 2] cleavage cyclization reaction for the synthesis of 1H-pyrazolo[3,4-b]pyridines from aryl Me ketones, 5-aminopyrazoles and enaminones was established. This transition metal-free catalysis method has simple reaction conditions and good substrate compatibility, and was demonstrated in the transformation of alkyl and natural mol.-derived enaminones. Mechanistic studies showed that two cyclization pathways affording different key intermediates were involved, but affording the same target product after site-selective cleavage of the unstrained C-C bond of the acyl group.Ethyl 3-(dimethylamino)acrylate(cas: 924-99-2Related Products of 924-99-2) was used in this study.

Ethyl 3-(dimethylamino)acrylate(cas: 924-99-2) belongs to anime. Reduction of nitro compounds, RNO2, by hydrogen or other reducing agents produces primary amines cleanly (i.e., without a mixture of products), but the method is mostly used for aromatic amines because of the limited availability of aliphatic nitro compounds. Reduction of nitriles and oximes (R2C=NOH) also yields primary amines.Related Products of 924-99-2

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Ester – Wikipedia,
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Application of 2818-08-8On September 14, 1990 ,《Caffeoylmalic and two pyrrole acids from Parietaria officinalis》 was published in Phytochemistry. The article was written by Budzianowski, Jaromir. The article contains the following contents:

A methanolic extract from leaves and flowers of P. officinalis afforded 3 acids, namely caffeoylmalic, 1H-pyrrole-2,3-dicarboxylic, and 1-[(caffeoyloxy)(carboxy)methoxy]-1H-pyrrole-2,3,5-tricarboxylic acids. In the experimental materials used by the author, we found Dimethyl 1H-pyrrole-2,3-dicarboxylate(cas: 2818-08-8Application of 2818-08-8)

Dimethyl 1H-pyrrole-2,3-dicarboxylate(cas: 2818-08-8) belongs to pyrroles. Pyrroles are components of more complex macrocycles, including the porphyrinogens and products derived therefrom, including porphyrins of heme, the chlorins, bacteriochlorins, and chlorophylls. Porphobilinogen, a trisubstituted pyrrole, is the biosynthetic precursor to many natural products such as heme.Application of 2818-08-8

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

《Synthesis of New Zerumbone Hydrazones and Their In-vitro Anticancer Activity》 was written by Vu, Vu V.; Vu, Tran K.. Application of 403-33-8This research focused onzerumbone hydrazone invitro anticancer activity. The article conveys some information:

A series of new zerumbone hydrazones 5a-f and 9a-f have been synthesized in via an in situ procedure in high yields. The structure of synthesized compounds has been confirmed using 1H 13C NMR and HR-MS. The bioassay result showed that several compounds exhibited cytotoxic effects against three human cancer cell lines, including HepG-2, SK-LU-1, and MCF-7. Compound 9a showed the best cytotoxic effect against HepG-2, SK-LU-1, and MCF-7 with IC50 values of 8.20, 6.66, and 9.35 μM, resp. This study aims at developing new zerumbone hydrazones as anticancer agents based on zerumbone, a natural compound wildly growing in Vietnam. A series of new zerumbone hydrazones was designed, synthesized, and evaluated for cytotoxicity against three human cancer cell lines, including HepG-2, MCF-7, and SKLu-1, using the MTT method. Especially, compound 9a displayed the best cytotoxic effect against HepG-2, SK-LU-1, and MCF-7 with IC50 values of 8.20, 6.66, and 9.35 μM, resp. The research results suggest that some compounds could be considered as leads for the future design of zerumbone hydrazones in which bio-isosteric replacements in theortho position of the Ph ring could be performed to improve the cytotoxic activity. In addition to this study using Methyl 4-fluorobenzoate, there are many other studies that have used Methyl 4-fluorobenzoate(cas: 403-33-8Application of 403-33-8) was used in this study.

Methyl 4-fluorobenzoate(cas: 403-33-8) can be used in the synthesis of trisubstituted imidazole derivatives containing a 4-fluorophenyl group, a pyrimidine ring, and a CN- or CONH2-substituted benzyl moiety.Application of 403-33-8

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

HPLC of Formula: 872-36-6In 2019 ,《Silica from diatom frustules as anode material for Li-ion batteries》 was published in RSC Advances. The article was written by Norberg, Andreas Nicolai; Wagner, Nils Peter; Kaland, Henning; Vullum-Bruer, Fride; Svensson, Ann Mari. The article contains the following contents:

In spite of its insulating nature, SiO2 may be utilized as active anode material for Li-ion batteries. Synthetic SiO2 will typically require sophisticated synthesis and/or activation procedures in order to obtain a satisfactory performance. Here, we report on diatom frustules as active anode material without the need for extensive activation procedures. These are composed primarily of silica, exhibiting sophisticated porous structures. Various means of optimizing the performance were investigated. These included carbon coating, the addition of fluoroethylene carbonate (FEC) and vinylene carbonate (VC) to the carbonate-based electrolyte, as well as activation by an initial potentiostatic hold step. The highest capacity (723 mA h g-1) was obtained with composite electrodes with pristine diatom frustules and conventional carbon black as additive, with the capacity still increasing after 50 cycles. The capacity was around 624 mA h g-1 after subtraction of the contributions from the carbon black. Carbon coated diatom frustules showed a slightly lower but stable capacity after 50 cycles (600 mA h g-1 after subtraction of contributions from the carbon coating and the carbon black). By the use of electrochem. characterization methods, as well as post-mortem studies, differences in reaction mechanisms could be identified and attributed to the operating and processing parameters. In the experiment, the researchers used many compounds, for example, Vinylene carbonate(cas: 872-36-6HPLC of Formula: 872-36-6)

Vinylene carbonate(cas: 872-36-6) belongs to esters. Alkyl carbonates find applications as solvents for lithium ion battery electrolytes and the use of high quality battery grade electrolytes having extremely low water (<10 ppm) and acid (<10 ppm) contents are critical for achieving high electrochemical performance.HPLC of Formula: 872-36-6

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

Application In Synthesis of Methyl 4-fluorobenzoateIn 2021 ,《Practical and rapid construction of 2-pyridyl ketone library in continuous flow》 appeared in Journal of Flow Chemistry. The author of the article were Sun, Maolin; Li, Jianchang; Liang, Chaoming; Shan, Chao; Shen, Xinyuan; Cheng, Ruihua; Ma, Yueyue; Ye, Jinxing. The article conveys some information:

Herein, a practical method for the rapid synthesis of 2-pyridyl ketone ArC(O)R [Ar = 2-pyridyl; R = Me, Ph, Bn, etc.] library in continuous flow was reported, in which the 2-lithiopyridine formed by Br/Li exchange reacts with com. available esters to obtain 2-pyridyl ketones ArC(O)R in a good yield at short reaction time. This protocol functions broadly on a variety of esters and had been applied to the synthesis of TGF-β type 1 receptor inhibitor LY580276 intermediate ArC(O)R [Ar = 6-methyl-2-pyridyl; R = (4-fluorophenyl)methyl] in an environmentally friendly method. It was rapid, reliable, and cost-efficient to afford diverse kinds of 2-pyridyl ketones ArC(O)R in the compound library. In the experimental materials used by the author, we found Methyl 4-fluorobenzoate(cas: 403-33-8Application In Synthesis of Methyl 4-fluorobenzoate)

Methyl 4-fluorobenzoate(cas: 403-33-8) can be used in the synthesis of trisubstituted imidazole derivatives containing a 4-fluorophenyl group, a pyrimidine ring, and a CN- or CONH2-substituted benzyl moiety.Application In Synthesis of Methyl 4-fluorobenzoate

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

Application of 609-14-3In 2021 ,《Umbelliferyloxymethyl phosphonate compounds-weakly binding zinc ionophores with neuroprotective properties》 appeared in Dalton Transactions. The author of the article were Guesne, Sebastien; Connole, Laura; Kim, Stephanie; Motevalli, Majid; Robson, Lesley; Michael-Titus, Adina T.; Sullivan, Alice. The article conveys some information:

Umbelliferone is a member of the coumarin family of compounds which are known for diverse pharmacol. activity including in targets relevant to Alzheimers disease, AD. The toxicity associated with some forms of the amyloid protein, Aβ, and the role of Zn2+ (and other biometals) dyshomeostasis in this, are of great interest in AD and make metal ionophore capability desirable in so called multi target drug ligands MTDLs. A new series of umbelliferyloxymethyl phosphonic acid diethylester compounds (umbelliferyloxymethyl phosphonates) bearing a phosphonate at the 7-position (compounds 1, 3-6), hydrolysis products 2, 2a and 2b from 1 and analogs 7 and 8 of 1 with 7-O to 7-S and 1-O to 1-NH substitutions, are reported. Single crystal x-ray structures of compounds 1, 2 and 2a were determined In terms of neuroprotective properties, the compounds 1, 2, 3, 4, 5 and 6 at 1μM concentration, inhibited the toxicity of Aβ1-42 (Aβ42) in both toxic Amyloid Derived Diffusible Ligand (ADDL) and fibrillar (fibril) forms towards rat hippocampal cells. Compound 7 displayed cytotoxicity and 8 failed to inhibit Aβ42 toxicity. Concerning compound-metal ionophore activity (assessed using chem. experiments), despite weak binding to Zn2+ determined from 31P NMR titration of 1 and 2 by ZnCl2, compounds 1, 3, 4, 5 and 6 demonstrated ionophore assisted partition of Zn2+ from water to octanol at micromolar concentrations with efficacy on a par with or better than the chelator MTDL clioquinol (5-chloro-7-iodo-8-hydroxyquinoline). Partition was assessed using furnace Atomic Absorption Spectroscopy (AAS). In further experiments interaction of compound 1 with Zn2+ or it’s pathways was inferred by (i) delayed fluorescence response with added Zn2+ in cells treated with FluoZin-3 and (ii) by suppression of Zn2+ promoted aggregation of Aβ42. The results came from multiple reactions, including the reaction of Ethyl 2-methyl-3-oxobutanoate(cas: 609-14-3Application of 609-14-3)

Ethyl 2-methyl-3-oxobutanoate(cas: 609-14-3) 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.Application of 609-14-3

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

In 2022,Krakowian, Daniel; Gadarowska, Dominika; Daniel-Wojcik, Anna; Mrzyk, Inga published an article in Toxicology In Vitro. The title of the article was 《Cytotoxicity assay to assess eye irritation – A comparison with other methods and possible strategies for use》.Synthetic Route of C7H12O3 The author mentioned the following in the article:

Many in vitro methods can be used to classify eye irritation or damage caused by exposure to a substance. In this study, a recently described method called the Cytotoxicity Assay to Assess Eye Irritation (CEI) was compared with other selected in vitro methods adopted in the OECD guidelines. Furthermore, the influence of combining more than one in vitro method was investigated. Basic performance indexes were considered and a risk assessment based on the number of correct and incorrect results (overestimated or underestimated) was performed. The CEI results were similar to those of other in vitro tests, however, the CEI can also directly classify substances irritating to the eyes. When the CEI preceded an eye irritation test based reconstructed human corneal-like epithelium, there were fewer underestimates compared with other method combinations. This combination can better protect human health and provides results comparable to those obtained in animal tests. The experimental part of the paper was very detailed, including the reaction process of Ethyl 2-methyl-3-oxobutanoate(cas: 609-14-3Synthetic Route of C7H12O3)

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.Synthetic Route of C7H12O3

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

In 2022,Zhang, Qi; Shi, Mingying; Mi, Xueling; Luo, Sanzhong published an article in Organic Chemistry Frontiers. The title of the article was 《Catalytic asymmetric oxidative sulfenylation of β-ketocarbonyls using a chiral primary amine》.HPLC of Formula: 609-14-3 The author mentioned the following in the article:

Enantioselective oxidative construction of a C(sp3)-S bond has been achieved using a chiral primary amine catalyst in the presence of tert-Bu hydroperoxide and a catalytic amount of tetrabutylammonium iodide. The distinctive feature of the current reaction is coupling with nucleophilic sulfur reactants under oxidative conditions. This protocol provides facile access to chiral thioethers bearing S-containing quaternary stereocenters with good chemo- and enantiocontrol. The experimental process involved the reaction of Ethyl 2-methyl-3-oxobutanoate(cas: 609-14-3HPLC of Formula: 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.HPLC of Formula: 609-14-3

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

In 2022,Ni, Congjian; Yu, Hailong; Liu, Ling; Yan, Ben; Zhang, Bingyi; Ma, Xiaoli; Zhang, Xiuhui; Yang, Zhi published an article in New Journal of Chemistry. The title of the article was 《An efficient catalytic method for the borohydride reaction of esters using diethylzinc as precatalyst》.Synthetic Route of C8H7FO2 The author mentioned the following in the article:

A cheap and easily available ZnEt2 is an effective precatalyst, which can be used for the hydroboration reaction of various organic carbonates and esters with HBpin. The preliminary hydroboration reaction mechanism has been investigated via the corresponding DFT calculation In the experimental materials used by the author, we found Methyl 4-fluorobenzoate(cas: 403-33-8Synthetic Route of C8H7FO2)

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.Synthetic Route of C8H7FO2

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