Author: Jessica.F

Application In Synthesis of 2-Hydroxy-2-(4-propoxyphenyl)acetic acidOn October 31, 2021 ,《Enantioseparation of mandelic acid and substituted derivatives by high-performance liquid chromatography with hydroxypropyl-β-cyclodextrin as chiral mobile additive and evaluation of inclusion complexes by molecular dynamics》 appeared in Chirality. The author of the article were Shi, Jie-Hua; Lin, Zhen-Yi; Kou, Song-Bo; Wang, Bao-Li; Jiang, Shao-Liang. The article conveys some information:

The enantioseparation and resolution mechanism of mandelic acid (MA), 4-methoxymandelic acid (MMA), and 4-propoxymandelic acid (PMA) were investigated by reversed-phase high-performance liquid chromatog. (HPLC) with 2-hydroxypropyl-β-cyclodextrin (HP-β-CD) as a chiral mobile-phase additive and mol. dynamics simulation. The suitable chromatog. conditions for the enantioseparation of MA, MMA, and PMA were obtained. Under the selected chromatog. conditions, these enantiomers could achieve baseline separation The results of thermodn. parameter anal. revealed that the main driven forces for the enantioseparation of MA, MMA, and PMA could be van der Waals forces and hydrogen-bonding interactions and the chromatog. retention of these chiral compounds was an enthalpy-driven process. The results of the mol. simulation revealed that their chiral resolution mechanism on HP-β-CD was responsible for the formation of inclusion complexes of enantiomers with HP-β-CD with different conformations and binding energies. And the binding energy of HP-β-CD with (S)-isomer was larger than that with (R)-isomer, which is consistent with the exptl. results of the first elution of (S)-isomer. Addnl., it is also confirmed that the interaction energies included the van der Waals energy (ΔEvdw), electrostatic energy (ΔEelec), polar solvation energy, and SASA energy (ΔEsasa), and the separation factor (α) was closely connected with the disparity in the binding energies of optical isomers and HP-β-CD complexes. Meanwhile, from mol. dynamics simulation, it can be found that the Δ(ΔEbinding), (Δ(ΔEbinding) = ΔEbinding,R – ΔEbinding,S) value was in order of MA-HP-β-CD complex > MMA-HP-β-CD complex > PMA-HP-β-CD complex, which was consistent with the order of Δ(ΔG) values obtained from van′t Hoff plot. This indicated that the mol. dynamics simulation has predictive function for chiral resolution2-Hydroxy-2-(4-propoxyphenyl)acetic acid(cas: 79694-16-9Application In Synthesis of 2-Hydroxy-2-(4-propoxyphenyl)acetic acid) was used in this study.

2-Hydroxy-2-(4-propoxyphenyl)acetic acid(cas: 79694-16-9) belongs to ethers.Application In Synthesis of 2-Hydroxy-2-(4-propoxyphenyl)acetic acidAlthough ethers resist hydrolysis, they are cleaved by hydrobromic acid and hydroiodic acid. Hydrogen chloride cleaves ethers only slowly.

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

The author of 《A novel fluorescence probe based on p-acid-Br and its application in thiourea detection》 were Wang, Xiu; Yang, Chunlei; Yan, Mei; Ge, Shenguang; Yu, Jinghua. And the article was published in RSC Advances in 2016. Reference of 1,4-Diethynyl-2,5-dimethoxybenzene The author mentioned the following in the article:

In this paper, a novel phenyleneethynylene derivative 4,4′-(2,5-dimethoxy-1,4-phenylene)bis(ethyne-2,1-diyl) dibenzoic acid (p-acid) and its derivative p-acid-Br were synthesized. IR spectroscopy (IR), fluorescence (FL) spectroscopy and UV visible (UV-vis) spectroscopy were applied to characterize p-acid and p-acid-Br. To research the practical applicability, a sample thiourea sensor was constructed using the p-acid-Br label, in which the FL intensity response was proportional to the thiourea concentration in the range of 0.5-1000 nM, with a detection limit of 0.26 nM. Furthermore, the sensor showed high specificity, excellent stability, and good reproducibility. The p-acid-Br-based thiourea sensor can also provide potential application for detection of other organics The method showed low detection limit, good specificity, high sensitivity and reproducibility. Satisfactory results were obtained for the determination of thiourea in various water samples and fruit juice samples. This work is to open new avenues in the application of the phenyleneethynylene derivative for a sensitive thiourea assay. Hence, the proposed fluorescence sensor could become a promising method for local market. In the experiment, the researchers used many compounds, for example, 1,4-Diethynyl-2,5-dimethoxybenzene(cas: 74029-40-6Reference of 1,4-Diethynyl-2,5-dimethoxybenzene)

1,4-Diethynyl-2,5-dimethoxybenzene(cas: 74029-40-6) belongs to ethers.The C-O bonds that comprise simple ethers are strong. They are unreactive toward all but the strongest bases. Although generally of low chemical reactivity, they are more reactive than alkanes. Reference of 1,4-Diethynyl-2,5-dimethoxybenzene

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

In 2013,Li, Xiaoxiao; Hou, Jianjun; Wang, Chao; Liu, Xinjie; He, Hongyan; Xu, Ping; Yang, Zhenjun; Chen, Zili; Wu, Yun; Zhang, Lihe published 《Synthesis and biological evaluation of RGD-conjugated MEK1/2 kinase inhibitors for integrin-targeted cancer therapy》.Molecules published the findings.Reference of tert-Butyl (2-(2-hydroxyethoxy)ethyl)carbamate The information in the text is summarized as follows:

Two novel series of RGD-MEKI conjugates derived from a MEK1/2 kinase inhibitor – PD0325901 – have been developed for integrin receptor mediated anticancer therapy. The first series, alkoxylamine analog RGD-MEKI conjugates showed anti-proliferation activity in melanoma A375 cells by the same mechanism as that of PD0325901. PEGylation increased the IC50 value of (I) [P = dimer-c(RGD)] three-fold in the A375 assay, and the multi-cRGD peptide cargo significantly improved the receptor specific anti-proliferation activity of I (P = RGD-PEG4) in integrin-overexpressing U87 cells. In the second series, RGD-PD0325901 (II) [P = c(RGDyK)] exhibited significantly increased antitumor properties compared to the alkoxylamine analogs by both inhibition of the ERK pathway activity and DNA replication of the cancer cells. Furthermore, II displayed more potent anti-proliferation activity in the U87 assay than PD0325901 in a dose-dependent manner. All these data demonstrate that RGD-MEKI conjugates with an ester bond linkage enhanced anticancer efficacy with improved targeting capability toward integrin-overexpressing tumor cells. The experimental process involved the reaction of tert-Butyl (2-(2-hydroxyethoxy)ethyl)carbamate(cas: 139115-91-6Reference of tert-Butyl (2-(2-hydroxyethoxy)ethyl)carbamate)

tert-Butyl (2-(2-hydroxyethoxy)ethyl)carbamate(cas: 139115-91-6) belongs to ethers.Ethers do have nonbonding electron pairs on their oxygen atoms, and they can form hydrogen bonds with other molecules (alcohols, amines, etc.) that have O―H or N―H bonds. The ability to form hydrogen bonds with other compounds makes ethers particularly good solvents for a wide variety of organic compounds and a surprisingly large number of inorganic compounds.Reference of tert-Butyl (2-(2-hydroxyethoxy)ethyl)carbamate

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

In 2019,Cells included an article by Sadraddin, Haval; Gaebel, Ralf; Skorska, Anna; Lux, Cornelia Aquilina; Sasse, Sarah; Ahmad, Beschan; Vasudevan, Praveen; Steinhoff, Gustav; David, Robert. Category: ethers-buliding-blocks. The article was titled 《CD271+ human mesenchymal stem cells show antiarrhythmic effects in a novel murine infarction model》. The information in the text is summarized as follows:

Background: Ventricular arrhythmias (VA) are a common cause of sudden death after myocardial infarction (MI). Therefore, developing new therapeutic methods for the prevention and treatment of VA is of prime importance. Methods: Human bone marrow derived CD271+ mesenchymal stem cells (MSC) were tested for their antiarrhythmic effect. This was done through the development of a novel mouse model using an immunocompromised Rag2-/- γc-/- mouse strain subjected to myocardial “”infarction-reinfarction””. The mice underwent a first ischemia-reperfusion through the left anterior descending (LAD) artery closure for 45 min with a subsequent second permanent LAD ligation after seven days from the first infarct. Results: This mouse model induced various types of VA detected with continuous ECG (ECG) monitoring via implanted telemetry device. The immediate intramyocardial delivery of CD271+ MSC after the first MI significantly reduced VA induced after the second MI. Conclusions: In addition to the clin. relevance, more closely reflecting patients who suffer from severe ischemic heart disease and related arrhythmias, our new mouse model bearing reinfarction warrants the time required for stem cell engraftment and for the first time enables us to analyze and verify significant antiarrhythmic effects of human CD271+ stem cells in vivo. The results came from multiple reactions, including the reaction of 6-(3-(Adamantan-1-yl)-4-methoxyphenyl)-2-naphthoic acid(cas: 106685-40-9Category: ethers-buliding-blocks)

6-(3-(Adamantan-1-yl)-4-methoxyphenyl)-2-naphthoic acid(cas:106685-40-9) may be used as a pharmaceutical reference standard for the quantification of the analyte in topical gel formulations using high-performance liquid chromatography technique.Category: ethers-buliding-blocks

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

In 2019,Tetrahedron included an article by Gergely, Mate; Kollar, Laszlo. Category: ethers-buliding-blocks. The article was titled 《Synthesis of benzamide-benzothiazole conjugates via palladium-catalyzed aminocarbonylation (hydrazinocarbonylation)》. The information in the text is summarized as follows:

The palladium-catalyzed aminocarbonylation of iodoarenes was investigated using 2-amino- and 2-hydrazinobenzothiazole as N-nucleophile. The reaction proved to be highly chemoselective in all cases: carboxamides and the corresponding carbohydrazides obtained by the acylation at the nitrogen adjacent to the C-2 of the benzothiazole moiety, were obtained exclusively and isolated in moderate to high yields. Systematic investigation of the reaction conditions revealed that the reaction requires relatively high temperature (higher than 70°). The effect of the carbon monoxide pressure is different in the synthesis of the two types of products: while the carboxamide formation is favored, the carbohydrazide formation is lowered by the increasing CO pressure. In the experimental materials used by the author, we found 1-Iodo-2-methoxybenzene(cas: 529-28-2Category: ethers-buliding-blocks)

1-Iodo-2-methoxybenzene(cas: 529-28-2) is a useful synthetic intermediate. It can be used in the synthesis of piperidinyl diaminopyrimidines as cyclin-dependent kinase inhibitors with antitumor activity and polysubstituted benzofuran derivatives as novel inhibitors of parasitic growth.Category: ethers-buliding-blocks

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

In 2019,Tetrahedron included an article by Yahaya, Issah; Seferoglu, Nurgul; Seferoglu, Zeynel. Reference of 2-Hydroxy-4-methoxybenzaldehyde. The article was titled 《Improved one-pot synthetic conditions for synthesis of functionalized fluorescent coumarin-thiophene hybrids: Syntheses, DFT studies, photophysical and thermal properties》. The information in the text is summarized as follows:

We have synthesized coumarin-thiophene hybrids using stepwise and one-pot methods under MWI and CM conditions, and then report the findings and conclusions: one-pot is better than stepwise in terms of high yields and fastness of getting products, and MWI (microwave irradiation) is better than CM (conventional method) in terms of purity of compounds, better yields, and reaction period. Even though both protocols were found to be efficient, the microwave-assisted irradiation reactions were identified to be better, environmentally friendly, cost-effective, mild, more efficient, less time consuming but with high purity. The two protocols were employed for the synthesis of the target coumarin-thiophene hybrids via the Gewald reaction in stepwise and in one-pot three-component. The dyes were prepared in good to excellent yields. Although, we recorded better yields via the stepwise protocol (80-96%), for the synthesis of the target mols., as compared to the one-pot (82-90%), the stepwise condition is fraught with many changes such as long reaction conditions, extra use of solvents for purification of intermediates, and long reaction durations. Photophys. activities of all the target derivatives were investigated using a combination of UV-vis and fluorescence spectroscopies in different solvents. The umbelliferon-like derivative 3g (I) was further investigated for possible use as a pH sensor via deprotonation (using TBAOH) and reverse protonation (using TFA), and was found to be applicable as pH sensor both in organic medium (DMSO) and partial aqueous binary (DMSO/H2O, volume/volume, 9:1) medium. Again, the ground and the excited state properties of the umbelliferon-like derivative 3g and its deprotonated form were also studied using the quantum chem. calculations Finally, the thermal properties of all the target compounds were investigated using TGA in order to test their potency and applicability as optical dyes. All the dyes 3a-j have high thermal stability therefore they can be applicable as optical dyes. The experimental part of the paper was very detailed, including the reaction process of 2-Hydroxy-4-methoxybenzaldehyde(cas: 673-22-3Reference of 2-Hydroxy-4-methoxybenzaldehyde)

2-Hydroxy-4-methoxybenzaldehyde(cas: 673-22-3) is employed in the synthesis of Schiff base ligand. It is applied as a reactant in the synthesis of LPA1R antagonists used in the inhibition of LPA-induced proliferation and contraction of normal human lung fibroblasts. Also used in the synthesis of tyrosine kinase 6 proteinase inhibitors.Reference of 2-Hydroxy-4-methoxybenzaldehyde

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

In 2019,Molecules included an article by Barre, Anais; Azzouz, Rabah; Gembus, Vincent; Papamicael, Cyril; Levacher, Vincent. Category: ethers-buliding-blocks. The article was titled 《Design, synthesis, and in-vitro biological activities of a bio-oxidizable prodrug to deliver both ChEs and DYRK1A inhibitors for AD therapy》. The information in the text is summarized as follows:

Despite their side effects, cholinesterase (ChE) inhibitors remain the only approved drugs to treat Alzheimer’s disease patients, along with the N-methyl-d-aspartate (NMDA) receptor antagonist memantine. In the last few years, the dual-specificity tyrosine phosphorylation-regulated kinase 1A (DYRK1A) has also been studied as a promising target for the development of new drugs for this pathol. In this context and based on previous characterization of bio-oxidizable prodrugs of potent acetylcholinesterase (AChE) inhibitors, a strategy involving the synthesis of a bio-oxidizable prodrug of both ChE and DYRK1A inhibitors was reported. To this end, a known potent inhibitor of DYRK1A, namely INDY was identified. The designed prodrug of both ChE and DYRK1A inhibitors was successfully synthesized, connecting both inhibitors by a carbonate link. This prodrug and its corresponding drug were then evaluated as ChEs and DYRK1A inhibitors. Remarkably, in-vitro results were in accordance with the starting hypothesis, showed a relative inactivity of the prodrug against DYRK1A and ChEs and a potent inhibition of ChEs by the oxidized form. Mol. docking and kinetic studies of ChE inhibition by the active compound were also discussed in this report. In the experiment, the researchers used many compounds, for example, tert-Butyl (2-(2-hydroxyethoxy)ethyl)carbamate(cas: 139115-91-6Category: ethers-buliding-blocks)

tert-Butyl (2-(2-hydroxyethoxy)ethyl)carbamate(cas: 139115-91-6) belongs to ethers.Although ethers resist hydrolysis, they are cleaved by hydrobromic acid and hydroiodic acid. Hydrogen chloride cleaves ethers only slowly. Category: ethers-buliding-blocks

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

The author of 《Integrated pyrazolo[1,5-a]pyrimidine-hemicyanine system as a colorimetric and fluorometric chemosensor for cyanide recognition in water》 were Tigreros, Alexis; Rosero, Hernan-Alejandro; Castillo, Juan-Carlos; Portilla, Jaime. And the article was published in Talanta in 2019. Computed Properties of C5H13NO2 The author mentioned the following in the article:

A new probe for cyanide detection based on the integrated pyrazolo[1,5-a]pyrimidine-hemicyanine (PpHe) system was synthesized in an efficient and straightforward manner using microwave-assisted heating. Photophys. studies in a 100% aqueous solution demonstrated high cyanide selectivity and detection limits as low as 600 and 86 nmol/L for UV-vis absorption and fluorescence emission, resp. Both values are <<1900 nmol/L, which is the maximum concentration permitted for drinking water by the WHO. HRMS anal. and NMR experiments were performed to confirm the mechanism of detection based on blocking the ICT phenomenon via nucleophilic addition of CN- on the C=N+ bond (iminium salt moiety) of the probe. In addition to this study using N,N-Dimethylformamide Dimethyl Acetal, there are many other studies that have used N,N-Dimethylformamide Dimethyl Acetal(cas: 4637-24-5Computed Properties of C5H13NO2) was used in this study.

N,N-Dimethylformamide Dimethyl Acetal(cas: 4637-24-5) belongs to anime. Left-handed and right-handed forms (mirror-image configurations, known as optical isomers or enantiomers) are possible when all the substituents on the central nitrogen atom are different (i.e., the nitrogen is chiral). With amines, there is extremely rapid inversion in which the two configurations are interconverted.Computed Properties of C5H13NO2

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

The author of 《Copper-Catalyzed Diastereoselective 1,2-Difunctionalization of Oxabenzonorbornadienes Leading to β-Thiocyanato Thioethers》 were Lin, Qifu; Yang, Wen; Yao, Yongqi; Chen, Shuqi; Tan, Yun; Chen, Donghan; Yang, Dingqiao. And the article was published in Organic Letters in 2019. Recommanded Product: 1-Iodo-2-methoxybenzene The author mentioned the following in the article:

A novel copper-catalyzed complete diastereoselective 1,2-difunctionalization of oxabicyclic alkenes has been developed. Two C-S bonds were constructed simultaneously on the oxabenzonorbornadienes leading to β-thiocyanato thioethers through the three-component (oxabicyclic alkenes, aryl iodides, and potassium thiocyanate), one-pot reaction. Various functional groups attached to the substrates were tolerated in this protocol to afford the corresponding β-thiocyanato thioether products in moderate yields. The experimental part of the paper was very detailed, including the reaction process of 1-Iodo-2-methoxybenzene(cas: 529-28-2Recommanded Product: 1-Iodo-2-methoxybenzene)

1-Iodo-2-methoxybenzene(cas: 529-28-2) participates in palladium catalyzed enantioselective Heck arylation of 2,3-dihydrofuran in the presence of chiral ionic liquids containing L-prolinate and L-lactate anions and non-chiral quaternary ammonium cations.Recommanded Product: 1-Iodo-2-methoxybenzene

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

《Cyanide chemosensors based on 3-dicyanovinylpyrazolo[1,5-a]pyrimidines: Effects of peripheral 4-anisyl group substitution on the photophysical properties》 was published in Talanta in 2020. These research results belong to Tigreros, Alexis; Castillo, Juan-Carlos; Portilla, Jaime. Related Products of 4637-24-5 The article mentions the following:

Novel dual-mode colorimetric/fluorometric probes based on 3-dicyanovinylpyrazolo[1,5-a]pyrimidines for cyanide (CN-) sensing have been developed (DPPa-c). These probes displayed high selectivity and sensitivity toward CN- over other interfering anions, with a detection limit (LOD) as low as 610/170 nmol L-1 (absorption/emission) for some of the prepared probes. After a reaction with CN-, low-fluorescent DPPa-c showed a significant decrease of the intramol. charge transfer (ICT) bands at approx. 390 nm (color changes from yellow to colorless) and exhibited up to an 82-fold fluorescence enhancement at approx. 465 nm (strong blue-light emission). The successive introduction of 4-anisyl (4-MeOPh) groups on periphery of the heterocyclic core had a dramatic influence on both the photophys. properties and CN- detection capability. The number of channels for CN- quantification in the absorption spectra increased from 1 in DPPa to 3 in DPPc. Moreover, the fluorescence emission LOD decreased from 300 nmol L-1 in DPPa to 170 nmol L-1 in DPPc. Finally, the selectivity toward CN- demonstrated a notable improvement when the probe had three 4-anisyl groups in its periphery (i.e., DPPc). The experimental part of the paper was very detailed, including the reaction process of N,N-Dimethylformamide Dimethyl Acetal(cas: 4637-24-5Related Products of 4637-24-5)

N,N-Dimethylformamide Dimethyl Acetal(cas: 4637-24-5) belongs to anime. The methylamines occur in small amounts in some plants. Many polyfunctional amines (i.e., those having other functional groups in the molecule) occur as alkaloids in plants—for example, mescaline, 2-(3,4,5-trimethoxyphenyl)ethylamine; the cyclic amines nicotine, atropine, morphine, and cocaine; and the quaternary salt choline, N-(2-hydroxyethyl)trimethylammonium chloride, which is present in nerve synapses and in plant and animal cells.Related Products of 4637-24-5

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem