Month: December 2022

Wang, Chen-Gang published the artcileCarbon Dioxide Mediated Cellulose Dissolution and Derivatization to Cellulose Carbonates in a Low-pressure System, Synthetic Route of 939-99-1, the publication is Carbohydrate Polymer Technologies and Applications (2022), 100186, database is CAplus.

An effective switchable solvent system using carbon dioxide (CO₂) and 2-tert-butyl-1,1,3,3-tetramethylguanidine (BTMG) for cellulose dissolution and derivatization was developed. High concentration cellulose solution (up to 10 wt%) could be achieved by dissolving microcrystalline cellulose rapidly, within 5 min, into DMSO in presence of BTMG and 1 atm CO₂ at room temperature The cellulose-carbonate anion intermediate was characterized by ¹H and ¹³C NMR spectroscopies, emphasizing the generation of cellulose carbonate anions and protonated BTMG. Addition of organochlorides into the cellulose solution triggers a nucleophilic substitution with cellulose-carbonate anions, producing various cellulose benzyl carbonates and a cellulose-carbonate-ester with degree of substitution (DS) up to 1.83 at 1 atm CO₂ pressure and room temperature The activation energy (Ea) and Gibbs free energy change (ΔG) of CO₂-mediated dissolution and nucleophilic substitution were calculated by d. functional theory. The results showed that the nucleophilic substitution is the rate-limiting step.

Carbohydrate Polymer Technologies and Applications published new progress about 939-99-1. 939-99-1 belongs to chlorides-buliding-blocks, auxiliary class Fluoride,Chloride,Benzyl chloride,Benzene, name is 1-(Chloromethyl)-4-(trifluoromethyl)benzene, and the molecular formula is C9H8BNO2, Synthetic Route of 939-99-1.

Referemce:
https://en.wikipedia.org/wiki/Chloride,
Chlorides – an overview | ScienceDirect Topics

Qin, Zhaohai published the artcileStudies on pyridine derivatives (IV): Synthesis and R. solani inhibiting activities of 4-aryl(alkyl)-3-[(2-chloropyrid)-4-yl]-1,2,4-triazoline-5-thiones, Related Products of chlorides-buliding-blocks, the publication is Nongyaoxue Xuebao (1999), 1(3), 85-87, database is CAplus.

Twelve 4-aryl(alkyl)-3-[(2-chloropyrid)-4-yl]-1,2,4-triazoline-5-thiones I (R = alkyl or aryl) were synthesized. Nine of them were good inhibitors for R. Solani (EC₅₀ were within 10.5âˆ?8.8 μg·mL^-1). Their ¹HNMR was also assigned.

Nongyaoxue Xuebao published new progress about 6313-54-8. 6313-54-8 belongs to chlorides-buliding-blocks, auxiliary class Pyridine,Chloride,Carboxylic acid, name is 2-Chloroisonicotinic acid, and the molecular formula is C6H4ClNO2, Related Products of chlorides-buliding-blocks.

Referemce:
https://en.wikipedia.org/wiki/Chloride,
Chlorides – an overview | ScienceDirect Topics

Wang, Yangyang published the artcileAldehyde-substituted donor-acceptor-type dithienylethenes as novel building blocks for photochromic materials, Application of 5-Chloro-3-[2-(5-chloro-2-methylthien-3-yl)cyclopent-1-en-1-yl]-2-methylthiophene, the publication is Journal of Chemical Research (2018), 42(10), 531-534, database is CAplus.

Two novel donor-π-acceptor-type dithienylethene derivatives I [n = 0, 1], in which the triphenylamine group acts as electron donor and the formyl group functions as electron acceptor, was developed. Their structures were confirmed by ¹H NMR, ¹³C NMR and HRMS (ESI). Investigation of their photochromic properties indicated that they had good photochromic behavior and excellent fatigue resistance on irradiation with UV or visible light. DFT calculations further validated these exptl. results for photochromic behavior. Moreover, these compounds could be utilized as versatile building blocks to construct novel near-IR photochromic materials.

Journal of Chemical Research published new progress about 219537-97-0. 219537-97-0 belongs to chlorides-buliding-blocks, auxiliary class Fused/Partially Saturated Cycles,Cyclopentenes, name is 5-Chloro-3-[2-(5-chloro-2-methylthien-3-yl)cyclopent-1-en-1-yl]-2-methylthiophene, and the molecular formula is C9H9ClN2, Application of 5-Chloro-3-[2-(5-chloro-2-methylthien-3-yl)cyclopent-1-en-1-yl]-2-methylthiophene.

Referemce:
https://en.wikipedia.org/wiki/Chloride,
Chlorides – an overview | ScienceDirect Topics

Li, Ziyong published the artcileSynthesis, photophysical properties and NIR photochromism of photoresponsive difluoroboron β-diketonate complex based on dithienylethene unit, SDS of cas: 219537-97-0, the publication is Dyes and Pigments (2019), 597-603, database is CAplus.

The development of stimuli-responsive difluoroboron β-diketonate materials has attracted more and more attention for their potential application in optoelectronics and functional bio-materials. In this study, we have designed and synthesized a novel photoresponsive dithienylethene-containing difluoroboron β-diketonate complex 1 by Knoevenagel condensation reaction. Its structure have been confirmed by ¹H NMR, ¹³C NMR and HRMS (ESI). And it exhibited solvent-dependent photophys. properties in solution before visible light irradiation Subsequently, photochromism of 1 was investigated in solution, and it was found that 1 revealed solvent-dependent and visible light-triggered NIR photochromic behaviors. Moreover, it also displayed excellent fluorescence switching behavior and photochromism in the film state upon visible light irradiation Accordingly, the dithienylethene 1 may be acted as a novel visible light-responsive fluorescence dyes in optoelectronic materials.

Dyes and Pigments published new progress about 219537-97-0. 219537-97-0 belongs to chlorides-buliding-blocks, auxiliary class Fused/Partially Saturated Cycles,Cyclopentenes, name is 5-Chloro-3-[2-(5-chloro-2-methylthien-3-yl)cyclopent-1-en-1-yl]-2-methylthiophene, and the molecular formula is C15H14Cl2S2, SDS of cas: 219537-97-0.

Referemce:
https://en.wikipedia.org/wiki/Chloride,
Chlorides – an overview | ScienceDirect Topics

Zhao, Yu. published the artcileSynthesis and molecular recognition study of 6-Cs-β-CD, HPLC of Formula: 10543-42-7, the publication is Guangpuxue Yu Guangpu Fenxi (1998), 18(4), 464-467, database is CAplus.

The reagents 6-coumarinsulfonyl-β-cyclodextrin (6-Cs-β-CD) with mol. recognition function were synthesized and identified. Both basic condition and enough illumination were necessary for obtaining stable and strong fluorescence. By using 6-Cs-β-CD as the host, cyclohexanol, cyclohexene, cyclohexane, or bromocyclohexane as the guest, the recognition properties were studied. The affinity of 6-Cs-β-CD and the guest is distinct with different hydrophobicity of the guest.

Guangpuxue Yu Guangpu Fenxi published new progress about 10543-42-7. 10543-42-7 belongs to chlorides-buliding-blocks, auxiliary class Other Aromatic Heterocyclic,Chloride,Sulfonyl chlorides,Ester, name is Coumarin-6-sulfonyl chloride, and the molecular formula is C28H41N2P, HPLC of Formula: 10543-42-7.

Referemce:
https://en.wikipedia.org/wiki/Chloride,
Chlorides – an overview | ScienceDirect Topics

Yang, Shizhong published the artcileA newly developed luminescent label – synthesis and properties of 6-coumarinsulfonyl chloride, Related Products of chlorides-buliding-blocks, the publication is Fenxi Huaxue (1992), 20(2), 202-4, database is CAplus.

The title compound (I) was prepared by reaction if coumarin with ClSO₃H. Effects of pH, lighting and surfactant on the fluorescence properties of its aqueous solution, and the reactiveness to amino acids etc. are studied. The results show that both basic condition and enough lighting are necessary conditions for obtaining stabilized and strong fluorescence from aqueous solution of I, and quaternary ammonium salt surfactant can enhance its fluorescence intensity. It also showed that this simple derivative of coumarin can be used as a luminescence labeling reagent for amino acid, amines etc. which has reactivity with SO₂Cl group.

Fenxi Huaxue published new progress about 10543-42-7. 10543-42-7 belongs to chlorides-buliding-blocks, auxiliary class Other Aromatic Heterocyclic,Chloride,Sulfonyl chlorides,Ester, name is Coumarin-6-sulfonyl chloride, and the molecular formula is C8H8BFO2, Related Products of chlorides-buliding-blocks.

Referemce:
https://en.wikipedia.org/wiki/Chloride,
Chlorides – an overview | ScienceDirect Topics

Yang, Shizhong published the artcilePreliminary study on 6-coumarinsulfonyl chloride as luminescence labeling reagent, Application of Coumarin-6-sulfonyl chloride, the publication is Fenxi Ceshi Xuebao (1993), 12(3), 49-52, database is CAplus.

Excessive 6-coumarinsulfonyl chloride (C6SCL) is reacted with L-alanine in pH 9.11 buffer solution (H₃BO₃-NaOH) at 40°C for 40 min and the reaction mixture is extracted with Et acetate. When the extract is dropped on a polyamide membrane and developed with formic acid-water (1 + 1) solution, the alanine C6SCL derivative is separated The R_f value is 0.67, 0.47 and 0.50 for the derivative, C6SCL and C6SOH, resp. After spraying the spot of derivative with 1 mol L^-1 NaOH solution and pre-illuminating and drying under UV light for 10 min, fluorescence intensity of the spot has a good linear relationship with amount of alanine in the range of (4-60) × 10^-11 mol. In addition, more intensive room temperature phosphorescence (RTP) of the derivation is induced by using 1.0 mol/L Pb(OAc)₂ as the heavy atom perturber and filter paper as solid substrate. All results show that the C₆SCL can be expected to serve as not only a fluorescence labeling reagent, but also a RTP one for amino acid etc.

Fenxi Ceshi Xuebao published new progress about 10543-42-7. 10543-42-7 belongs to chlorides-buliding-blocks, auxiliary class Other Aromatic Heterocyclic,Chloride,Sulfonyl chlorides,Ester, name is Coumarin-6-sulfonyl chloride, and the molecular formula is C10H10O2, Application of Coumarin-6-sulfonyl chloride.

Referemce:
https://en.wikipedia.org/wiki/Chloride,
Chlorides – an overview | ScienceDirect Topics

Lu, Xing published the artcileCatalytic Synthesis of Functional Silicon-Stereogenic Silanes through Candida antarctica Lipase B Catalyzed Remote Desymmetrization of Silicon-Centered Diols, Related Products of chlorides-buliding-blocks, the publication is European Journal of Organic Chemistry (2013), 2013(26), 5814-5819, database is CAplus.

Si-containing diols were synthesized and used in lipase-catalyzed remote desymmetrization. E.g., reaction of 3,3′-[methyl(phenyl)silanediyl]bis(3,1-phenylene)dimethanol with acetic anhydride in CHCl₃ in the presence of Candida antarctica lipase B gave 90% yield of 3-((3-(hydroxymethyl)phenyl)(methyl)(phenyl)silyl)benzyl acetate (78% ee). This synthetic method is valuable in the construction of optically active Si-stereogenic organosilicon compounds Good enantioselectivities of the remote desymmetrization was achieved with Candida antarctica lipase B (CAL-B) (up to 90:10 er).

European Journal of Organic Chemistry published new progress about 14799-94-1. 14799-94-1 belongs to chlorides-buliding-blocks, auxiliary class Aliphatic Chain, name is Dichloro(hexyl)(methyl)silane, and the molecular formula is C7H16Cl2Si, Related Products of chlorides-buliding-blocks.

Referemce:
https://en.wikipedia.org/wiki/Chloride,
Chlorides – an overview | ScienceDirect Topics

Lu, Xing published the artcileCatalytic Synthesis of Functional Silicon-Stereogenic Silanes through Candida antarctica Lipase B Catalyzed Remote Desymmetrization of Silicon-Centered Diols, Synthetic Route of 14799-93-0, the publication is European Journal of Organic Chemistry (2013), 2013(26), 5814-5819, database is CAplus.

Si-containing diols were synthesized and used in lipase-catalyzed remote desymmetrization. E.g., reaction of 3,3′-[methyl(phenyl)silanediyl]bis(3,1-phenylene)dimethanol with acetic anhydride in CHCl₃ in the presence of Candida antarctica lipase B gave 90% yield of 3-((3-(hydroxymethyl)phenyl)(methyl)(phenyl)silyl)benzyl acetate (78% ee). This synthetic method is valuable in the construction of optically active Si-stereogenic organosilicon compounds Good enantioselectivities of the remote desymmetrization was achieved with Candida antarctica lipase B (CAL-B) (up to 90:10 er).

European Journal of Organic Chemistry published new progress about 14799-93-0. 14799-93-0 belongs to chlorides-buliding-blocks, auxiliary class Aliphatic Chain, name is Dichloro(methyl)(octyl)silane, and the molecular formula is C9H20Cl2Si, Synthetic Route of 14799-93-0.

Referemce:
https://en.wikipedia.org/wiki/Chloride,
Chlorides – an overview | ScienceDirect Topics

Stevens, Jason M. published the artcileAdvancing Base Metal Catalysis through Data Science: Insight and Predictive Models for Ni-Catalyzed Borylation through Supervised Machine Learning, Application of Ethyl 2-(4-chlorophenoxy)-2-methylpropanoate, the publication is Organometallics (2022), 41(14), 1847-1864, database is CAplus.

An expansive data set containing 33 substrates, 36 unique monophosphine ligands, and two solvents was produced for the NiCl₂·6H₂O catalyzed aryl (pseudo)halide borylation with tetrahydroxydiboron for a total of 1632 reactions. Exploratory data anal. revealed excellent reaction performance with simple triarylphosphines (P(p-F-Ph)₃ and P(p-Anis)₃) and mixed aryl-alkyl phosphines (PPh₂Cy), in addition to the previously established high performance with Cy-JohnPhos. The data were used to train machine learning models that predicted out of sample reaction performance with a root-mean-square error of 18.4. The important features extracted from the models identified three phosphine parameters that offered reliable reactivity thresholds for identifying optimal ligand performance. The predictive models showed reasonable performance for predicting reaction yields employing ligands not included in model training, while the important feature boundaries accurately classified the performance of 10 of the 12 external ligands examined

Organometallics published new progress about 637-07-0. 637-07-0 belongs to chlorides-buliding-blocks, auxiliary class Inhibitor,Cell Cycle,PPAR, name is Ethyl 2-(4-chlorophenoxy)-2-methylpropanoate, and the molecular formula is 0, Application of Ethyl 2-(4-chlorophenoxy)-2-methylpropanoate.

Referemce:
https://en.wikipedia.org/wiki/Chloride,
Chlorides – an overview | ScienceDirect Topics