Month: October 2022

In 2015,Wang, Fang; Yang, Zhuang; Liu, Yibin; Ma, Liang; Wu, Yuzhe; He, Lin; Shao, Mingfeng; Yu, Kun; Wu, Wenshuang; Pu, Yuzhi; Nie, Chunlai; Chen, Lijuan published 《Synthesis and biological evaluation of diarylthiazole derivatives as antimitotic and antivascular agents with potent antitumor activity》.Bioorganic & Medicinal Chemistry published the findings.Name: Ethyl 2-amino-2-thioxoacetate The information in the text is summarized as follows:

By switching position of the N and S atom in the thiazole ring which were similar to the previously reported agent 5-(4-ethoxyphenyl)-4-(3′,4′,5′-trimethoxyphenyl)thiazol-2-amine, a series of 4,5-diarylthiazole derivatives were synthesized using Friedel-Crafts reaction based on chem. modification of Combrestatatin A-4 (CA-4). Their antiproliferative activities were evaluated and identified as new microtubule destabilizing agents. Structure-activity relation study indicated that compound 4-(4-Ethoxyphenyl)-5-(3,4,5-trimethoxyphenyl)thiazol-2-amine with 3,4,5-trimethoxyphenyl group at the C-4 position and 4-ethoxyphenyl group at the C-5 position of 2-amino substituted thiazole was of the most potent inhibitory activity in this series. 4-(4-Ethoxyphenyl)-5-(3,4,5-trimethoxyphenyl)thiazol-2-amine exhibits the IC50 values of 8.4-26.4 nM in five human cancer cell lines, with comparable inhibition effects to CA-4. Moreover, 4-(4-Ethoxyphenyl)-5-(3,4,5-trimethoxyphenyl)thiazol-2-amine showed potency as a tubulin polymerization inhibitor, with colchicine site binding ability and comparable extent of inhibition against the growth of P-glycoprotein over-expressing multidrug resistant cell lines. Mechanism studies revealed that 4-(4-Ethoxyphenyl)-5-(3,4,5-trimethoxyphenyl)thiazol2-amine could block the progression of cell cycle in the G2/M phase and result in cellular apoptosis in cancer cells. As a new tubulin destabilizing agent, 4-(4-Ethoxyphenyl)-5-(3,4,5-trimethoxyphenyl)thiazol-2-amine was also found high antivascular activity as it concentration-dependently reduced the cell migration and disrupted capillary like tube formation of HUVEC cells. Furthermore, 4-(4-Ethoxyphenyl)-5-(3,4,5-trimethoxyphenyl)thiazol2-amine significantly suppressed the tumor growth in HCT116 and SK-OV-3 xenograft models with tumor growth inhibitory rate of 55.12% and 72.7%, resp. The authors’ studies highlighted that 4-(4-Ethoxyphenyl)-5-(3,4,5-trimethoxyphenyl)thiazol-2-amine was a promising microtubule targeting antitumor agent. In the part of experimental materials, we found many familiar compounds, such as Ethyl 2-amino-2-thioxoacetate(cas: 16982-21-1Name: Ethyl 2-amino-2-thioxoacetate)

Ethyl 2-amino-2-thioxoacetate(cas: 16982-21-1) belongs to anime. In organic chemistry, amines are compounds and functional groups that contain a basic nitrogen atom with a lone pair. Amines are formally derivatives of ammonia (NH3), wherein one or more hydrogen atoms have been replaced by a substituent such as an alkyl or aryl group (these may respectively be called alkylamines and arylamines; amines in which both types of substituent are attached to one nitrogen atom may be called alkylarylamines).Name: Ethyl 2-amino-2-thioxoacetate

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

In 2016,Hu, Fangdong; Liu, Huanhuan; Jia, Jiong; Ma, Chen published 《Transition-metal-free synthesis of indole-fused dibenzo[b,f][1,4]oxazepines via Smiles rearrangement》.Organic & Biomolecular Chemistry published the findings.Product Details of 329-59-9 The information in the text is summarized as follows:

A one-pot transition-metal-free approach for the synthesis of indole-fused dibenzo[b,f][1,4]oxazepines, e.g., I from 2-(1H-indol-2-yl)phenol and 1,2-dihalobenzenes or 2-halonitroarenes has been developed. The proposed mechanism for this transformation features a Smiles rearrangement favored over a direct intramol. nucleophilic cyclization, which affords the corresponding products in different regioselectivities. This reaction also features simple reaction conditions and wide functional group tolerance. In the experimental materials used by the author, we found Methyl 4-fluoro-3-nitrobenzoate(cas: 329-59-9Product Details of 329-59-9)

Methyl 4-fluoro-3-nitrobenzoate(cas: 329-59-9) belongs to methyl benzoate. Methyl benzoate reacts at both the ring and the ester, depending on the substrate. Electrophiles attack the ring, illustrated by acid-catalysed nitration with nitric acid to give methyl 3-nitrobenzoate.Product Details of 329-59-9Methyl 4-fluoro-3-nitrobenzoate is used to prepare dimethyl 3-nitro-3′,4-oxydibenzoate by reacting with 3-hydroxy-benzoic acid methyl ester.

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

In 2018,Chilcott, Robert P; Mitchell, Hannah; Matar, Hazem published 《Optimization of Nonambulant Mass Casualty Decontamination Protocols as Part of an Initial or Specialist Operational Response to Chemical Incidents.》.Prehospital emergency care published the findings.Related Products of 119-36-8 The information in the text is summarized as follows:

Objective: The UK’s Initial Operational Response (IOR) is a new process for improving the survival of multiple casualties following a chemical, biological, radiological or nuclear incident. Whilst the introduction of IOR represents a patient-focused response for ambulant casualties, there is currently no provision for disrobe and dry decontamination of nonambulant casualties. Moreover, the current specialist operational response (SOR) protocol for nonambulant casualty decontamination (also referred to as “”clinical decontamination””) has not been subject to rigorous evaluation or development. Therefore, the aim of this study was to confirm the effectiveness of putatively optimized dry (IOR) and wet (SOR) protocols for nonambulant decontamination in human volunteers. Methods: Dry and wet decontamination protocols were objectively evaluated using human volunteers. Decontamination effectiveness was quantified by liquid chromatography-mass spectrometry analysis of the recovery of a chemical warfare agent simulant (methylsalicylate) from skin and hair of volunteers, with whole-body fluorescence imaging to quantify the skin distribution of residual simulant. Results: Both the dry and wet decontamination processes were rapid (3 and 4 min, respectively) and were effective in removing simulant from the hair and skin of volunteers, with no observable adverse effects related to skin surface spreading of contaminant. Conclusions: Further studies are required to assess the combined effectiveness of dry and wet decontamination under more realistic conditions and to develop appropriate operational procedures that ensure the safety of first responders. In the experiment, the researchers used many compounds, for example, Methyl Salicylate(cas: 119-36-8Related Products of 119-36-8)

Methyl Salicylate(cas: 119-36-8) has been used: as a component of clarifying solution for treating Mongolian gerbil cochlea intact for immunofluorescence analysis, as a plant elicitor to test its effect on reducing the whitefly population from tomato plants.Related Products of 119-36-8

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

In 2019,Catalysis Science & Technology included an article by Yuan, Yu-Chao; Bruneau, Christian; Roisnel, Thierry; Gramage-Doria, Rafael. Product Details of 2495-35-4. The article was titled 《Site-selective Ru-catalyzed C-H bond alkenylation with biologically relevant isoindolinones: a case of catalyst performance controlled by subtle stereo-electronic effects of the weak directing group》. The information in the text is summarized as follows:

Alkenylated isoindolinones I [R = CO2Me, Ph, 4-FC6H4, etc.; R1 = H; R2 = H, Me, Cl, MeO, CN, CO2Et; R3 = R4 = H, Me, MeO; R1R2 = OCH2O] were prepared via site-selective Ru-catalyzed C-H bond alkenylation of isoindolinones with alkenes. Notably, besides the presence of two aromatic C-H sites available for functionalization, selective mono-alkenylation in the ortho-position with respect to the nitrogen atom were achieved with a readily available ruthenium catalyst. The scalability, versatility and high functional group tolerance of the catalysis enabled the late-stage functionalization of biol. relevant indoprofen and further derivatizations. Preliminary mechanistic studies indicated, the ease of the C-H bond activation step, the key role of the carbonyl group as a weak directing group throughout the catalytic cycle and the unexpected subtle differences associated between cyclic amides and imides as weak directing groups in ruthenium-catalyzed C-H bond alkenylation reactions. The isolation and role of an unprecedented off-cycle ruthenium complex was discussed as well. In the experiment, the researchers used Benzyl acrylate(cas: 2495-35-4Product Details 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.Product Details of 2495-35-4

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

In 2019,Chemistry – A European Journal included an article by Banjo, Shona; Nakasuji, Eiko; Meguro, Tatsuhiko; Sato, Takaaki; Chida, Noritaka. Category: esters-buliding-blocks. The article was titled 《Copper-Catalyzed Electrophilic Amidation of Organotrifluoroborates with Use of N-Methoxyamides》. The information in the text is summarized as follows:

An efficient method was reported for the synthesis of anilides ArNHC(O)R [Ar = Ph, 4-MeC6H4, 4-ClC6H4, etc.; R = i-Pr, c-hexyl, (CH2)3OBn, etc.] via copper-catalyzed electrophilic amidation of aryltrifluoroborates with N-methoxyamides. The reaction showed high functional group compatibility derived from two distinct features: 1) the high stability of the N-methoxyamides and 2) the nonbasic mild conditions in the presence of LiCl. The developed method could also be applied to the synthesis of enamides, which are widely distributed in natural products. Preliminary mechanistic studies suggested that the initial step was transmetalation of the aryltrifluoroborate by the assistance of LiCl, and the resulting aryl copper intermediate provided the anilide through non-SN2 oxidative addition to the N-methoxyamide and subsequent reductive elimination. In the experimental materials used by the author, we found N-tert-Butoxycarbonylhydroxylamine(cas: 36016-38-3Category: esters-buliding-blocks)

N-tert-Butoxycarbonylhydroxylamine(cas: 36016-38-3) belongs to anime.Typically the presence of an amine functional group is deduced by a combination of techniques, including mass spectrometry as well as NMR and IR spectroscopies. 1H NMR signals for amines disappear upon treatment of the sample with D2O. In their infrared spectrum primary amines exhibit two N-H bands, whereas secondary amines exhibit only one.Category: esters-buliding-blocks

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

In 2019,Journal of Medicinal Chemistry included an article by Liu, Mingming; Liang, Yuru; Zhu, Zhongzhen; Wang, Jin; Cheng, Xingxing; Cheng, Jiayi; Xu, Binpeng; Li, Rong; Liu, Xinhua; Wang, Yang. Application of 4755-77-5. The article was titled 《Discovery of Novel Aryl Carboxamide Derivatives as Hypoxia-Inducible Factor 1α Signaling Inhibitors with Potent Activities of Anticancer Metastasis》. The information in the text is summarized as follows:

In order to discover novel hypoxia-inducible factor 1 (HIF-1) inhibitors for the cancer metastasis treatment, 68 new aryl carboxamide compounds were synthesized and evaluated for their inhibitory effect by dual luciferase-reporter assay. Based on five rounds of investigation on structure-activity relationships step by step, compound I was discovered as the most active inhibitor (IC50 = 0.32 μM) with no obvious cytotoxicity (CC50 > 50 μM). It effectively attenuated hypoxia-induced HIF-1α protein accumulation and reduced transcription of vascular epidermal growth factor in a dose-dependent manner, which was further demonstrated by its inhibitory potency on capillary-like tube formation, angiogenesis of zebrafish as well as cellular migration and invasion. Importantly, compound I exhibited antimetastatic potency in breast cancer lung metastasis in the mice model, indicating its promising therapeutic potential for prevention and treatment of tumor metastasis. These results definitely merit attention for further rational design of more efficient HIF-1 inhibitors in the future. The results came from multiple reactions, including the reaction of Ethyl oxalyl monochloride(cas: 4755-77-5Application of 4755-77-5)

Ethyl oxalyl monochloride(cas: 4755-77-5) belongs to acyl chlorides. In the laboratory, acyl chlorides are generally prepared by treating carboxylic acids with thionyl chloride (SOCl2). The reaction is catalyzed by dimethylformamide and other additives.Application of 4755-77-5

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

In 2019,Organic Chemistry Frontiers included an article by Beltran, Frederic; Andna, Lucile; Miesch, Laurence. Synthetic Route of C5H6O2. The article was titled 《Spirocyclization of keto-ynesulfonamides promoted by quaternary ammonium salts》. The information in the text is summarized as follows:

Spirocyclization of keto-ynesulfonamides R(CH2)2N(CCR1)Ts (R = 2-oxocyclopentyl, 5,5-dimethyl-2-oxocyclohexyl, 8-oxo-1,4-dioxaspiro[4.5]decan-7-yl, etc.; R1 = H, Ph, 2H-1,3-benzodioxol-5-yl, etc.) with quaternary ammonium salts was performed to access aza-spiro compounds, e.g., I. Exclusive E-configured 5-exo-dig compounds e.g., I were isolated from keto-ynesulfonamides substituted by an aryl- or a vinyl group, whereas 6-endo-dig compounds e.g., II were favored from terminal ynesulfonamides.Ethyl propiolate(cas: 623-47-2Synthetic Route of C5H6O2) was used in this study.

Ethyl propiolate(cas: 623-47-2) is a clear colorless to pale yellow liquid that is soluble in ethanol, ether and chloroform. It an important organic chemical raw material and pharmaceutical intermediate. Ethyl propargylate is obtained by oxidation of propargyl alcohol to propargylic acid followed by esterification.Synthetic Route of C5H6O2

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

In 2019,ACS Medicinal Chemistry Letters included an article by Peng, Lijie; Zhang, Zhensheng; Lei, Chong; Li, Shan; Zhang, Zhang; Ren, Xiaomei; Chang, Yu; Zhang, Yan; Xu, Yong; Ding, Ke. Recommanded Product: 51644-96-3. The article was titled 《Identification of New Small-Molecule Inducers of Estrogen-related Receptor α (ERRα) Degradation》. The information in the text is summarized as follows:

A series of (E)-3-(4-((2,4-bis(trifluoromethyl)benzyl)oxy)-3-methoxyphenyl)-2-cyanoacrylamide derivatives were designed and synthesized as new estrogen-related receptor α (ERRα) degraders based on the proteolysis targeting chimera (PROTAC) concept. One of the representative compounds I is capable of specifically degrading ERRα protein by >80% at a relatively low concentration of 30 nM, becoming one of the most potent and selective ERRα degraders to date. Compound I could be utilized as a new powerful research tool for further biol. investigation of ERRα. The results came from multiple reactions, including the reaction of tert-Butyl (5-aminopentyl)carbamate(cas: 51644-96-3Recommanded Product: 51644-96-3)

Some of the reported applications of tert-Butyl (5-aminopentyl)carbamate(cas: 51644-96-3) include: synthesis of of a supermacrocycle that self-assemble to form organic nanotubes., preparation of water-soluble unsymmetrical sulforhodamine fluorophores from monobrominated sulfoxanthene dye, synthesis of functionalized porphyrins as biocompatible carrier system for photodynamic therapy (PDT).Recommanded Product: 51644-96-3

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

In 2019,Crystal Growth & Design included an article by Kalinke, Lucas H. G.; Cangussu, Danielle; Lloret, Francesc; Bruno, Rosaria; Armentano, Donatella; Pardo, Emilio; Ferrando-Soria, Jesus. Formula: C4H5ClO3. The article was titled 《A Metalloligand Approach for the Self-Assembly of a Magnetic Two-Dimensional Grid-of-Grids》. The information in the text is summarized as follows:

The efficient organization of discrete functional mols. into extended frameworks, while retaining their phys. properties, is a mandatory requisite to move toward applications. Here the authors describe the validity of the metalloligand design strategy as a versatile and powerful approach to build up a two-dimensional (2D) magnetic metal-organic framework (MOF) composed of preformed discrete antiferromagnetically coupled [3 × 3] CuII9 incomplete grids. In the 1st stage, a novel oxamato-based nonanuclear copper(II) complex was self-assembled from the reaction of a polytopic organic ligand, with well-defined coordination pockets, with CuII ions. Then, the nonanuclear complex was used as metalloligand toward calcium(II) cations to afford a CaII-CuII 2-dimensional MOF [Ca3(H2O)12[Cu9(dabtzox)6μ2(H2O)4μ3(H2O)2]].20H2O (1) with a grid-like topol. and the magnetic properties of the preformed nonanuclear grids. In the experimental materials used by the author, we found Ethyl oxalyl monochloride(cas: 4755-77-5Formula: C4H5ClO3)

Ethyl oxalyl monochloride(cas: 4755-77-5) belongs to acyl chlorides. In the laboratory, acyl chlorides are generally prepared by treating carboxylic acids with thionyl chloride (SOCl2). The reaction is catalyzed by dimethylformamide and other additives.Formula: C4H5ClO3

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

The author of 《Biomimetic Enantioselective Total Synthesis of (-)-Robustanoids A and B and Analogues》 were Liu, Zhan-Jiang; Huang, Pei-Qiang. And the article was published in Journal of Organic Chemistry in 2019. Safety of H-Trp-OMe.HCl The author mentioned the following in the article:

We report a step-economical, enantioselective total synthesis of (-)-robustanoid B, I (R = MeO), and (-)-robustanoid A, I (R = OH), and four novel natural product-like compounds Our strategy relied on our biosynthetic hypothesis and on a novel complexity generation methodol., namely, the one-pot hydroxylative double cyclization reaction. The latter consists of a modified 3,3-dimethyldioxirane-triggered epoxidation-epoxide-ring-opening cyclization reaction cascade and Trost’s regioselectivity umpolung methodol. (“”anti-Michael addition””). In the experiment, the researchers used many compounds, for example, H-Trp-OMe.HCl(cas: 7524-52-9Safety of H-Trp-OMe.HCl)

H-Trp-OMe.HCl(cas:7524-52-9) is one of amino acid derivatives. Amino acid derivatives represent an important category of skin penetration promoters. These compounds possess hydrophobic chains attached to an amino acid headgroup via a biodegradable ester bond. Due to the amphiphilic nature of these derivatives, it is possible for them to enter into the SC lipid barrier and significantly disorganize skin membrane lipids.Safety of H-Trp-OMe.HCl

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