Tag: 0-100

Reference of Ethyl propiolateIn 2020 ,《Domino Reaction for the Synthesis of Polysubstituted Pyrroles and Lamellarin R》 was published in Journal of Organic Chemistry. The article was written by Hwu, Jih Ru; Roy, Animesh; Panja, Avijit; Huang, Wen-Chieh; Hu, Yu-Chen; Tan, Kui-Thong; Lin, Chun-Cheng; Hwang, Kuo-Chu; Hsu, Ming-Hua; Tsay, Shwu-Chen. The article contains the following contents:

Treatment of α-silylaryl triflates, Schiff bases, and alkynes was generated polysubstituted pyrroles in good yields (61-86%) with regioselectivity. This domino reaction involved completion of five sequential steps in a single flask, which comprised aryne formation through 1,2-elimination, their alkylation by Schiff bases through 1,2-addition, 1,4-intramol. proton transfer, Huisgen 1,3-dipolar cycloaddition, and dehydrogenative aromatization. It was then successfully applied as the key step in the synthesis of the natural product lamellarin R. This new reaction represented an efficient, sustainable process for the production of chem. materials. The experimental process involved the reaction of Ethyl propiolate(cas: 623-47-2Reference of Ethyl propiolate)

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.Reference of Ethyl propiolate

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

Synthetic Route of C5H6O2In 2020 ,《A copper-catalyzed reaction between terminal alkynes, acetylenic esters, and oxiranes: efficient synthesis of 2H-pyran-4-carboxylate》 appeared in Monatshefte fuer Chemie. The author of the article were Jahanshad, Milad; Manafi, Mohammadreza; Mousavi-Safavi, Seyed Mahmoud; Homami, Seyed Saied; Ghazanfarpour-Darjani, Majid. The article conveys some information:

A catalytic reaction between terminal alkynes, acetylenic esters, and oxiranes has been described. This domino transformation serves as a useful sequential and one-pot method for the synthesis of 2H-pyran-4-carboxylate skeletons from the readily available starting materials. In situ-generated copper acetylides treated initially with oxiranes in the presence of copper catalysts and tetrabutylphosphonium salts, followed by addition of propiolates after 60 min to form synthetically important heterocycles. The experimental part of the paper was very detailed, including the reaction process of Ethyl propiolate(cas: 623-47-2Synthetic Route of C5H6O2)

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

《A Designed Durable Electrolyte for High-Voltage Lithium-Ion Batteries and Mechanism Analysis》 was written by Zou, Yeguo; Shen, Yabin; Wu, Yingqiang; Xue, Hongjin; Guo, Yingjun; Liu, Gang; Wang, Limin; Ming, Jun. Category: esters-buliding-blocks And the article was included in Chemistry – A European Journal in 2020. The article conveys some information:

Rechargeable lithium-ion batteries (LIBs) dominate the energy market, from electronic devices to elec. vehicles, but pursuing greater energy d. remains challenging owing to the limited electrode capacity. Although increasing the cut-off voltage of LIBs (>4.4 V vs. Li/Li+) can enhance the energy d., the aggravated electrolyte decomposition always leads to a severe capacity fading and/or expiry of the battery. Herein, a new durable electrolyte is reported for high-voltage LIBs. The designed electrolyte is composed of mixed linear alkyl carbonate solvent with certain cyclic carbonate additives, in which use of the ethylene carbonate (EC) co-solvent was successfully avoided to suppress the electrolyte decomposition As a result, an extremely high cycling stability, rate capability, and high-temperature storage performance were demonstrated in the case of a graphite|LiNi0.6Co0.2Mn0.2O2 (NCM622) battery at 4.45 V when this electrolyte was used. The good compatibility of the electrolyte with the graphite anode and the mitigated structural degradation of the NCM622 cathode are responsible for the high performance at high potentials above 4.4 V. This work presents a promising application of high-voltage electrolytes for pursuing high energy LIBs and provides a straightforward guide to study the electrodes/electrolyte interface for higher stability. In the experimental materials used by the author, we found Vinylene carbonate(cas: 872-36-6Category: esters-buliding-blocks)

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.Category: esters-buliding-blocks

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

The author of 《Synthetic Diversity from a Versatile and Radical Nitrating Reagent》 were Zhang, Kun; Jelier, Benson; Passera, Alessandro; Jeschke, Gunnar; Katayev, Dmitry. And the article was published in Chemistry – A European Journal in 2019. Computed Properties of C5H6O2 The author mentioned the following in the article:

A new methodol. was described for the activation of N-nitrosuccimide for the direct synthesis of β-nitroalkenes, β-nitrohydrins, β-nitroethers, isoxazolines I [R = Me, cyclopropyl; R1 = n-heptyl, Bn, CH2OPh; R2 = H, R1R2 = (CH2)4, (CH2)9, (CH2)10C(O)(CH2)3; R3 = H, Me] and isoxazoles II [R4 = CO2Et, CH2CH2Br, cyclohexyl, etc.]. Detailed mechanistic studies strongly suggested that a mesolytic N-N bond fragmentation liberates a nitryl radical. Using in situ photo-sensitized, ESR spectroscopy, direct evidence of a nitryl radical in solution by nitrone spin-trapping was observed To further exhibit versatility of N-nitrosuccinimide under photoredox conditions, the late-stage diversification of an extensive number of C-H partners to prepare isoxazolines I and isoxazoles II was presented. This approach allowed for the formation of an in situ nitrile oxide from a ketone partner, the presence of which was detected by the formation of the corresponding furoxan when conducted in the absence of a dipolarophile. This 1,3-dipolar cycloaddition with nitrile oxides and alkenes or alkynes proceeded in a single-operational step using a mild, regioselective and general protocol with broad chemoselectivity. After reading the article, we found that the author used Ethyl propiolate(cas: 623-47-2Computed Properties of C5H6O2)

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.Computed Properties of C5H6O2

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

In 2019,Organic Chemistry Frontiers included an article by Liu, Zhaohong; Raveendra Babu, Kaki; Wang, Feng; Yang, Yang; Bi, Xihe. Computed Properties of C5H6O2. The article was titled 《Influence of sulfonyl substituents on the decomposition of N-sulfonylhydrazones at room temperature》. The information in the text is summarized as follows:

A detailed study of the dissociation performance of structurally varied N-sulfonylhydrazones was described and N-tfsylhydrazone was proved to be the best substrate to give the corresponding diazo compound R1C(N2)R2 [R1 = Ph, 2-FC6H4, 2,4-di-ClC6H3, etc.; R2 = H, Me, Ph] at room temperature N-tfsylhydrazone was capable of releasing non-stabilized aryldiazomethane in a wide range of solvents in the presence of various commonly used bases under mild reaction conditions (-25° to 40°). The utility of the strategy was established by late-stage derivatization of bioactive mols. and several typically sensitive reactions, in which highly purified diazo compounds were required. The experimental process involved the reaction of Ethyl propiolate(cas: 623-47-2Computed Properties of C5H6O2)

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.Computed Properties of C5H6O2

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

《Rhodium-Catalyzed Cascade Reactions of Indoles with 4-Hydroxy-2-Alkynoates for the Synthesis of Indole-Fused Polyheterocycles》 was written by Wu, Xiaowei; Li, Pinyi; Lu, Yangbin; Qiao, Jin; Zhao, Jingwei; Jia, Xiuwen; Ni, Hangcheng; Kong, Lichun; Zhang, Xiaoning; Zhao, Fei. Related Products of 623-47-2 And the article was included in Advanced Synthesis & Catalysis in 2020. The article conveys some information:

Herein, the authors describe an efficient and regioselective Rh(III)-catalyzed [4+2]-annulation/lactonization cascade of indoles with 4-hydroxy-2-alkynoates at room temperature to access the furo[3′,4′:4,5]pyrimido[1,6-a]indole-1,5(3H,4H)-diones I [R1 = H, 10-OMe, 9-CN, 8-F, etc., R2 = H, Me, Ph, CH2CN, etc., R3 = H, Me, (CH2)2Ph, etc., R4 = H, Me, Et, R3R4 = (CH2)4, (CH2)5, (CH2)6] and II. This method features mild reaction conditions, operational simplicity, excellent regioselectivity, broad substrate scope with good functional group tolerance, and good to excellent yields. The results came from multiple reactions, including the reaction of Ethyl propiolate(cas: 623-47-2Related Products of 623-47-2)

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.Related Products of 623-47-2

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

《Irreversible dilation of graphite composite anodes influenced by vinylene carbonate》 was published in Journal of Power Sources in 2020. These research results belong to Ivanov, Svetlozar; Sauerteig, Daniel; Dimitrova, Anna; Krischok, Stefan; Bund, Andreas. Recommanded Product: 872-36-6 The article mentions the following:

The volumetric expansion of graphite composite electrodes for Li ion battery is studied by electrochem. dilatometry in electrolytes with different concentration of vinylene carbonate (VC). While the reversible dilation of the anode coatings is not influenced by the VC concentration the irreversible part displays a strong dependence. With the increase of VC amount in the electrolyte the irreversible dilation decreases significantly, showing that the addition of VC has a pos. effect on the mech. performance of the battery. The observed behavior is associated with differences in the decomposition mechanism of the electrolyte components and their reaction kinetics, influenced by the presence of VC. In contrast to the VC containing electrolyte, the passivation layer formed on the anode in the absence of VC cannot effectively terminate the electroactivity of the graphite surface and the electron charge transfer. This leads to a continuous incorporation of decomposition products in the composite layer during the subsequent cycles and related to this addnl. irreversible volume expansion. The anal. performed by combined application of dilatometric, impedance and XPS techniques reveals the pos. role of VC for improving the electrochem.-mech. properties of the graphite porous anode.Vinylene carbonate(cas: 872-36-6Recommanded Product: 872-36-6) was used in this study.

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.Recommanded Product: 872-36-6

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

《Enabling Ether-Based Electrolytes for Long Cycle Life of Lithium-Ion Batteries at High Charge Voltage》 was written by Jia, Hao; Xu, Yaobin; Burton, Sarah D.; Gao, Peiyuan; Zhang, Xianhui; Matthews, Bethany E.; Engelhard, Mark H.; Zhong, Lirong; Bowden, Mark E.; Xiao, Biwei; Han, Kee Sung; Wang, Chongmin; Xu, Wu. Recommanded Product: Vinylene carbonate And the article was included in ACS Applied Materials & Interfaces in 2020. The article conveys some information:

Lithium-ion batteries (LIBs) with high-nickel (Ni) content LiNixMnyCozO2 (x + y + z = 1) (NMC with Ni ≥ 0.6) cathodes operated at high charge voltages have been considered as one of the most promising candidates for addressing the challenge of increasing energy d. demand. Conventional LiPF6-organocarbonate electrolytes exhibit incompatibility with such cell chemistries under certain testing conditions because of the instability of electrode/electrolyte interphases. In response to this challenge, ether-based electrolytes with finely tuned structure and composition of solvation sheaths were developed and evaluated in graphite (Gr)‖NMC811 cell chem. in 2.5-4.4 V, despite ethers being conventionally considered to be unfavorable electrolyte solvents for LIBs because of their anodic instability above 4.0 V and cointercalation into Gr electrodes. The functional ether-based electrolytes in this work enable both excellent cycle life and high rate capability of Gr‖NMC811 cells. Mechanistic studies reveal that the unique structure and composition of the solvation sheath of the functional ether electrolytes are the main reasons behind their excellent anodic stability and effective protection of the Gr electrode and, consequently, the extraordinary cell performances when operated at high charge cutoff voltages. This work also provides a feasible approach in developing highly stable functional electrolytes for high-energy d. LIBs. In the part of experimental materials, we found many familiar compounds, such as Vinylene carbonate(cas: 872-36-6Recommanded Product: Vinylene carbonate)

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.Recommanded Product: Vinylene carbonate

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

《Synthesis, NMR analysis and X-ray crystal structure of 3,9-bis(4-(trifluoromethyl)phenyl)-3,9-diazatetraasterane》 was published in Journal of Molecular Structure in 2020. These research results belong to Tan, Hong-bo; Wang, Yin-feng. Safety of Ethyl propiolate The article mentions the following:

Novel 3,9-bis-4-(trifluoromethyl)phenyl-3,9-diazatetraasterane, Tetra-Et 3,9-bis-4-(trifluoromethyl)phenyl-3,9-diazahexacyclo[6.4.0.02,7.04,11.05,10]dodecane-1,5,7,11-tetracarboxylate was obtained by [2 + 2] photocycloaddition of di-Et 1-4-(trifluoromethyl)phenyl-1,4-dihydropyridine-3,5-dicarboxylate. The intermediate syn-dimer was isolated and assisted to investigate the complexity of NMR spectra. The dimers structures of were unequivocally confirmed by NMR, HRMS and XRD anal. To discuss the steric symmetry effects on the NMR of the two dimers, NMR spectra anal. (1D-NMR and 2D-NMR) was conducted in details by the chem. shifts, couplings and correlations. XRD anal. aids to clarify the mol. symmetry of dimers and explicated that the steric effect and the special long-range coupling of CH2 lead to much more complicated NMR spectra of syn-dimer than that of cage-dimer. In the part of experimental materials, we found many familiar compounds, such as Ethyl propiolate(cas: 623-47-2Safety of Ethyl propiolate)

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.Safety of Ethyl propiolate

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

The author of 《Material search for Li-ion battery electrolytes through an exhaustive search with a Gaussian process》 were Nakayama, Tomofumi; Igarashi, Yasuhiko; Sodeyama, Keitaro; Okada, Masato. And the article was published in Chemical Physics Letters in 2019. Formula: C3H2O3 The author mentioned the following in the article:

When creating an estimation model, determining which variables are efficient is of considerable importance. To strictly select efficient variables, it is necessary to define appropriate criteria for the task and to perform an exhaustive search, which is the search method that evaluates and compares all variable combinations. In this study, we apply an exhaustive search with a Gaussian process (ES-GP) to estimate coordination energy, which is related to performance of a Li-ion battery, and show that the estimation accuracy of ES-GP is significantly better than that of other methods in previous studies, such as MLR, LASSO and ES-LiR. In addition to this study using Vinylene carbonate, there are many other studies that have used Vinylene carbonate(cas: 872-36-6Formula: C3H2O3) was used in this study.

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.Formula: C3H2O3

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