Month: November 2022

Synthetic Route of C7H6O2In 2021 ,《Design, synthesis and in silico screening of benzoxazole-thiazolidinone hybrids as potential inhibitors of SARS-CoV-2 proteases》 was published in RSC Advances. The article was written by Krishna Cheerala, Vijay Sai; Ghanta, Prasanth; Neelakantan, Sundaresan Chittor. The article contains the following contents:

Hybrid mols. in the recent years have gained significant importance in drug research as promising therapeutic agents. We report a novel combination of two such bioactive scaffolds (benzoxazole and 4-thiazolidinone B-T hybrids) as inhibitors of SARS-CoV-2. The study uses an in silico approach to identify the potential of B-T hybrids as possible inhibitors of the SARS-CoV-2 proteases. Mol. docking was employed to identify the interactions of B-T hybrids with the two proteases – 3CLp (the 3-chymotrypsin-like protease) and PLp (the papain-like protease). Docking results of the screened 81 hybrids indicated that BT10 and BT14 interacted with the catalytic dyad residue of 3CLp (Cys145) with the best binding energy. MD simulations revealed that BT10 formed stable interactions via 4 hydrogen bonds with the catalytic site residues of 3CLp. In the case of PLp, BT27 and MBT9 interacted with the catalytic triad residue of PLp (His272) with high binding energy. MD simulations demonstrated that the reference drug Tipranavir relocated to the thumb region of the protease whereas BT27 remained in the active site of PLp stabilized by 2 hydrogen bonds, while MBT9 relocated to the BL2 loop of the palm region. The MM-PBSA and interaction entropy (IE) anal. indicated that BT14 exhibited the best ΔG (of -6.83 kcal mol-1) with 3CLp, while BT27 exhibited the best ΔG (of -7.76 kcal mol-1) with PLp. A four-step synthetic procedure was employed to synthesize the B-T hybrids starting from ammonium thiocyanate. The short-listed compounds in the case of 3CLp were synthesized and characterized using IR, NMR, and HRMS spectroscopic techniques. The experimental process involved the reaction of 3-Hydroxybenzaldehyde(cas: 100-83-4Synthetic Route of C7H6O2)

3-Hydroxybenzaldehyde(cas: 100-83-4) is used as an ionophore, during the development of an highly selective and sensitive PVC membrane sensor, which can be used as a Tb3+ ion selective electrode.Synthetic Route of C7H6O2

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COA of Formula: C3H9NO2In 2019 ,《Light-Responsive Serinol-Based Polycarbonate and Polyester as Degradable Scaffolds》 was published in ACS Applied Bio Materials. The article was written by Sun, Jingjiang; Jung, Dimitri; Schoppa, Timo; Anderski, Juliane; Picker, Marie-Theres; Ren, Yi; Mulac, Dennis; Stein, Nora; Langer, Klaus; Kuckling, Dirk. The article contains the following contents:

Stimuli-responsive self-immolative aliphatic polycarbonates (APCs) and polyesters (APEs) have attractive advantages for biomedical and pharmaceutical applications. In the present work, polycondensation of o-nitrobenzyl-protected serinol was explored as a simple route to obtain light-responsive polycarbonate (LrPC) and polyester (LrPE). By exposure to UV light, these polymers decomposed rapidly and completely into oligomers and small mols., as detected by size exclusion chromatog. (SEC), UV/vis, and 1H NMR spectroscopies. The degradation mechanism of serinol-based APC and APE was investigated with the help of the Boc-protected model APC and APE, showing that the APC underwent intramol. cyclization, accompanied by intermol. transcarbamation, and degraded into oxazolidinone and 2-aminopropanol terminated oligourethanes. Different from APC, the degradation process of serinol-based APE has been proven by electrospray ionization time-of-flight mass spectrometry (ESI-ToF-MS) to follow intramol. cyclization of the functional amine group with the remote ester group, forming a ten-membered cyclic degradation compound Further processing of the serinol-based polymers was performed by preparation of nanoparticles (NP). With light-responsive characteristics, a drug delivery system could be potentially obtained enabling a controllable drug release. Based on this strategy, a variety of self-immolative polymers responsive to different triggers can be prepared by polycondensation without the limit of ring-opening polymerization and will expand the family of biodegradable polymers. In the experiment, the researchers used many compounds, for example, 2-Aminopropane-1,3-diol(cas: 534-03-2COA of Formula: C3H9NO2)

2-Aminopropane-1,3-diol(cas: 534-03-2) belongs to anime. Halogenation, in which one or more hydrogen atoms of an amine is replaced by a halogen atom, occurs with chlorine, bromine, and iodine, as well as with some other reagents, notably hypochlorous acid (HClO). With primary amines the reaction proceeds in two stages, producing N-chloro- and N,N-dichloro-amines, RNHCl and RNCl2, respectively. With tertiary amines, an alkyl group may be displaced by a halogen.COA of Formula: C3H9NO2

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Application In Synthesis of 2,4,6-Trihydroxybenzene-1,3,5-tricarbaldehydeIn 2020 ,《Sulphonate functionalized covalent organic framework-based magnetic sorbent for effective solid phase extraction and determination of fluoroquinolones》 was published in Journal of Chromatography A. The article was written by Wen, Aying; Li, Guoliang; Wu, Di; Yu, Yanxin; Yang, Yan; Hu, Na; Wang, Honglun; Chen, Jian; Wu, Yongning. The article contains the following contents:

Most of the reported covalent organic frameworks (COFs) are hydrophobic, limiting their adsorption application in sample pretreatment field. In this work, sulfonate functionalized magnetic covalent organic frameworks (COFs) composites were first synthesized by loading gold nanoparticles on Fe3O4@COF(TpBD) surface and then functionalized by sodium 3-mercaptopropanesulfonate immobilization via Au-S bonding formation (denoted as Fe3O4@COF(TpBD)@Au-MPS nanocomposites), which were further utilized as adsorbents for magnetic solid-phase extraction (MSPE) of fluoroquinolones. Compared with Fe3O4@COF(TpBD), the composites exhibited higher affinity to fluoroquinolones. Under optimized conditions, the developed MSPE method coupled with HPLC-MS/MS showed good linearity (R2 ≥0.9989) and yielded low limits of detection (0.1-1.0μg kg-1) for fluoroquinolones. Moreover, the proposed method was successfully applied to extract fluoroquinolones from spiked meats (pork, chicken and bovine). The satisfactory recoveries were in the range of 82-110.2% with the relative standard deviations (RSDs) lower than 7.7%. These results indicated that the Fe3O4@COF(TpBD)@Au-MPS is a promising magnetic adsorbent for trace fluoroquinolones determination in meat samples. This work not only provided a facile strategy for COF functionalization, but also developed an efficient method for detecting fluoroquinolones in foodstuffs. In the experimental materials used by the author, we found 2,4,6-Trihydroxybenzene-1,3,5-tricarbaldehyde(cas: 34374-88-4Application In Synthesis of 2,4,6-Trihydroxybenzene-1,3,5-tricarbaldehyde)

2,4,6-Trihydroxybenzene-1,3,5-tricarbaldehyde(cas: 34374-88-4) is a member of phloroglucinol derivatives. Phloroglucinol derivatives are a major class of secondary metabolites. Phloroglucinol compounds can be classified into monomeric, dimeric, trimeric and higher phloroglucinols, and phlorotannins.Application In Synthesis of 2,4,6-Trihydroxybenzene-1,3,5-tricarbaldehyde

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Quality Control of Potassium sodium (2R,3R)-2,3-dihydroxysuccinate tetrahydrateIn 2017 ,《superhydrophobic Cu-Zn coating with dandelion-like CuO microstructure》 was published in Journal of Alloys and Compounds. The article was written by Li, Hao; Yu, Sirong. The article contains the following contents:

In this work, a Cu-Zn coating with dandelion-like CuO microstructure was fabricated on pipeline steel surface by a simple two-step combined method of electrodeposition and chem. oxidation This coating was then coated with a thin pentadecafluorooctanoic acid to achieve superhydrophobic, with the contact angle of water about 156.81° and the sliding angle around 3°. When a water droplet contacted on the Cu-Zn coating surface, the dandelion-like CuO microstructure was seen as the dual-scale structure that was proposed to be composed of spherical and pillared microstructures. Based on the Wenzel’s and Cassie’s formulas, the theor. explanation was used to confirm the Cassie-Cassie wetted state between water droplet and the dandelion-like hierarchical superhydrophobic coating according to the geometric parameters of the surface morphol. Meanwhile, the superhydrophobic Cu-Zn coating had the ability to repel the impinging water droplets and excellent long-term, thermal, solution immersion and chem. stability. Such robust superhydrophobic Cu-Zn coating with hierarchical microstructures was expected to have various potential applications in our daily life.Potassium sodium (2R,3R)-2,3-dihydroxysuccinate tetrahydrate(cas: 6381-59-5Quality Control of Potassium sodium (2R,3R)-2,3-dihydroxysuccinate tetrahydrate) was used in this study.

Potassium sodium (2R,3R)-2,3-dihydroxysuccinate tetrahydrate(cas: 6381-59-5) is a ferroelectric crystal with a high piezoelectric effect and electromechanical coupling coefficient. Quality Control of Potassium sodium (2R,3R)-2,3-dihydroxysuccinate tetrahydrate It may be used as a constituent to prepare DNS (3,5- dinitrosalicylic acid) reagent and Fehling′s solution B, which are used in the determination of reducing sugar.

Referemce:
Alcohol – Wikipedia,
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COA of Formula: C3H8ClNOIn 2012 ,《Synthesis of the side chain of tebipenem pivoxil》 was published in Zhongguo Xinyao Zazhi. The article was written by Huang, Xiaoguang; Huang, Binge; Zhu, Shaoxuan. The article contains the following contents:

The side chain 1-(4,5-dihydrothiazol-2-yl) azetidine-3-thiol hydrochloride of tebipenem pivoxil was synthesized. 1-(4,5-Dihydrothiazol-2-yl) azetidine-3-thiol hydrochloride was prepared from 2-(methylthio)-4,5-dihydrothiazole by a 4-step process, i.e. successively reacted with 3-hydroxyazetidine hydrochloride, methanesulfonyl chloride, potassium ethanethioate and hydrolysis. The total yield of 1-(4,5-dihydrothiazol-2-yl) azetidine-3-thiol hydrochloride was 42%. This method increases the yield of 1-(4,5-dihydrothiazol-2-yl) azetidine-3-thiol hydrochloride, simplifies the process and decreases the cost. The results came from multiple reactions, including the reaction of Azetidin-3-ol hydrochloride(cas: 18621-18-6COA of Formula: C3H8ClNO)

Azetidin-3-ol hydrochloride(cas:18621-18-6) is one of azetidine.Azetidines (azacyclobutanes) constitute a well-known class of heterocyclic compounds. Azetidine scaffold has been discovered in several natural products.COA of Formula: C3H8ClNO Several pharmacologically important synthetic compounds also contain azetidine ring. Because of inherent ring strain, the synthesis of azetidines is a challenging endeavor.

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Alcohol – Wikipedia,
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Recommanded Product: 89466-08-0In 2021 ,《Facile Synthesis of Tetraarylpyrazines by Sequential Cross-coupling Approach》 was published in Chemistry Letters. The article was written by Nishiyama, Yoshitake; Akiyama, Kei; Sakata, Yuki; Hosoya, Takamitsu; Yoshida, Suguru. The article contains the following contents:

A facile synthetic method for unsym. tetraarylpyrazines I (R = 4-CH3C6H4, 2-naphthyl; R1 = 4-CF3C6H4, 4-(OTBS)C6H4, 4-NCC6H4; R2 = C6H5, 4-CH3OC6H4; R3 = 4-FC6H4, 4-N(CH3)2C6H4, 2-OHC6H4, 4-F3CC6H4, 4-N(C6H5)2C6H4) by sequential cross-couplings is disclosed. This 5-step synthesis was achieved from 2-amino-3,5-dibromo-6-chloropyrazine through four-fold cross-coupling and diazotization. Dibenzo-fused quinoxaline like 2-(4-methoxyphenyl)-7-methyl-3-(4-(trifluoromethyl)phenyl)dibenzo[f,h]quinoxaline synthesis was also accomplished by further intramol. coupling.2-Hydroxyphenylboronic acid(cas: 89466-08-0Recommanded Product: 89466-08-0) was used in this study.

2-Hydroxyphenylboronic acid(cas: 89466-08-0) belongs to acyl phenylboronic acid. Phenylboronic acid (PBA), a synthetic molecule applied in RNA affinity chromatography, is able to form reversible covalent ester bonds with 1,2- or 1,3-cis-doils on the ribose ringRecommanded Product: 89466-08-0

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《Pyroelectric properties of the triglycine sulphate crystal formerly influenced by a transverse electric field》 was written by Fugiel, Boguslaw; Kikuta, Toshio. Product Details of 6381-59-5This research focused ontriglycine sulfate rochelle salt pyroelectricity elec field hysteresis polarization. The article conveys some information:

Measurements of the hysteresis loop and pyroelec. c.d. have been carried out. It has been shown that the function describing the remanent polarization decay over time generated by a prolonged transverse elec. field is for TGS qual. the same as for other uniaxial ferroelecs. (TGSe, Rochelle salt) regardless of the fact that different electrode-sample systems were used. A prolonged application of an elec. potential Vs at temperature T = TA < TC (TC is the critical temperature of the paraelec.-ferroelec. phase transition) to a side ring electrode of a round plate sample changes pyroelec. properties of TGS and leads to the memory effect. For T < TA, the polarization P values obtained by time integration of elec. c.d. measured after Vs disconnection differ from those measured before Vs application by a constant value, and therefore, the first derivative ∂P/∂T remains unchanged provided that the temperature TA is not exceeded. In the experiment, the researchers used Potassium sodium (2R,3R)-2,3-dihydroxysuccinate tetrahydrate(cas: 6381-59-5Product Details of 6381-59-5)

Potassium sodium (2R,3R)-2,3-dihydroxysuccinate tetrahydrate(cas: 6381-59-5) is a ferroelectric crystal with a high piezoelectric effect and electromechanical coupling coefficient. Product Details of 6381-59-5 It may be used as a constituent to prepare DNS (3,5- dinitrosalicylic acid) reagent and Fehling′s solution B, which are used in the determination of reducing sugar.

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Alcohol – Wikipedia,
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《Zero field splitting parameters of Cr3+ doped potassium sodium dl-tartrate tetrahydrate》 was written by Kripal, Ram; Yadav, Awadhesh Kumar. Reference of Potassium sodium (2R,3R)-2,3-dihydroxysuccinate tetrahydrateThis research focused onzero field splitting parameter chromium doped potassium sodium dl. The article conveys some information:

The zero field splitting parameters (ZFSPs) D and E of Cr3+ ion doped potassium sodium dl-tartrate tetrahydrate (PSTT), KNaC4H4O6·4H2O are calculated using the superposition model. The theor. calculated ZFSPs for Cr3+ in PSTT crystal are compared with the exptl. values obtained by ESR. Theor. ZFSPs are in good agreement with the exptl. values. The energy band positions of optical absorption spectra of Cr3+ in PSTT single crystal calculated with the CFA package agree well with exptl. values. The experimental part of the paper was very detailed, including the reaction process of Potassium sodium (2R,3R)-2,3-dihydroxysuccinate tetrahydrate(cas: 6381-59-5Reference of Potassium sodium (2R,3R)-2,3-dihydroxysuccinate tetrahydrate)

Potassium sodium (2R,3R)-2,3-dihydroxysuccinate tetrahydrate(cas: 6381-59-5) is a ferroelectric crystal with a high piezoelectric effect and electromechanical coupling coefficient. Reference of Potassium sodium (2R,3R)-2,3-dihydroxysuccinate tetrahydrate Potassium sodium tartrate tetrahydrate has been used in the preparation of Lowry reagent for the determination of microsomal protein concentration in rat hepatic microsomes by Lowry method.

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Alcohol – Wikipedia,
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In 2013,Green and Sustainable Chemistry included an article by Liu, Yi; Sugimoto, Ryuichi; Sumi, Katsuhiro. Name: 4-Butylbenzene-1,2-diol. The article was titled 《Di(isothiocyanato)bis(4-methyl-4′-vinyl-2,2′-bipyridine) ruthenium(II) films deposited on titanium oxide-coated, fluorine-doped tin oxide for an efficient solar cell》. The information in the text is summarized as follows:

Dye-sensitized titanium oxide electrodes were prepared by immobilizing a novel ruthenium complex, di(isothiocyanato) bis(4-methyl-4′-vinyl-2,2′-bipyridine)ruthenium(II) [(NCS)2(mvbpy)2Ru(II)] or the ruthenium complex/sodium 4-vinylbenzenesulfonate onto the surface of a titanium oxide-coated, fluorine-doped tin oxide (TiO2/FTO) electrode through a new electrochem. initiated film formation method, in which the electrolysis step and the film deposition step were individually performed. The incident photon-to-current conversion efficiency (IPCE) of the Ru complex film on a TiO2/FTO electrode was disappointedly insufficient (1.2% at 440 nm). In sharp contrast, the Ru(II) complex/sodium 4-vinylbenzenesulfonate composite film deposited on the surface of a TiO2/FTO electrode showed maximum IPCE of 31.7% at 438 nm. In the experimental materials used by the author, we found 4-Butylbenzene-1,2-diol(cas: 2525-05-5Name: 4-Butylbenzene-1,2-diol)

4-Butylbenzene-1,2-diol(cas: 2525-05-5) belongs to organoboron compounds. Organoboron compounds are versatile intermediates and as such are some of the most important classes of reagents in modern organic chemistry.Name: 4-Butylbenzene-1,2-diol Organoboron compounds are less toxic than organostannane reagents, and unlike alkynylzinc and magnesium, many organoboron compounds possess remarkable oxidative and thermal stabilities.

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In 2019,Advanced Synthesis & Catalysis included an article by Wu, Rui; Li, Jun; Wang, Yajun; Quan, Zhengjun; Su, Yingpeng; Huo, Congde. Safety of ((3aS,5aR,8aR,8bS)-2,2,7,7-Tetramethyltetrahydro-3aH-bis([1,3]dioxolo)[4,5-b:4′,5′-d]pyran-3a-yl)methanol. The article was titled 《Copper-catalyzed aerobic oxidative dehydrogenative ring-opening reaction of glycine esters with α’-angelicalactone: Approach to construct α-amino-γ-ketopimelates》. The information in the text is summarized as follows:

A copper-catalyzed aerobic oxidative dehydrogenative reaction of glycine derivatives with α’-angelicalactone is achieved under mild and simple reaction conditions. This strategy can be applicable to a wide range of glycine esters, including complex substrates derived from (+)-dehydroisoandrosterone or menthol, thus enabling the oxidative dehydrogenative ring-opening reaction for producing diverse functionalized α-amino-γ-ketopimelate derivatives in an atom-economic manner. In the experiment, the researchers used many compounds, for example, ((3aS,5aR,8aR,8bS)-2,2,7,7-Tetramethyltetrahydro-3aH-bis([1,3]dioxolo)[4,5-b:4′,5′-d]pyran-3a-yl)methanol(cas: 20880-92-6Safety of ((3aS,5aR,8aR,8bS)-2,2,7,7-Tetramethyltetrahydro-3aH-bis([1,3]dioxolo)[4,5-b:4′,5′-d]pyran-3a-yl)methanol)

((3aS,5aR,8aR,8bS)-2,2,7,7-Tetramethyltetrahydro-3aH-bis([1,3]dioxolo)[4,5-b:4′,5′-d]pyran-3a-yl)methanol(cas: 20880-92-6) is a useful reactant for examining the effectiveness of sulfamate and sulfamide groups for the inhibition of carbonic anhydrase-​II (CA-​II)​. And it is used as chiral auxiliaries in Michael and Aldol addition reactions.Safety of ((3aS,5aR,8aR,8bS)-2,2,7,7-Tetramethyltetrahydro-3aH-bis([1,3]dioxolo)[4,5-b:4′,5′-d]pyran-3a-yl)methanol

Referemce:
Alcohol – Wikipedia,
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