Month: December 2022

Gasson, E. J. published the artcileNew organic sulfur vesicants. IV. 1,2-Di(2-chloroethylthio)ethane and analogs, Quality Control of 1002-41-1, the publication is Journal of the Chemical Society (1948), 44-6, database is CAplus and MEDLINE.

1,2-Bis(2-hydroxypropylmercapto)ethane, b₅ 189-90°, m. 28°; the di-2-Cl analog b_0.005 78-9°, m. 14-15°. HOC₂H₄SH with 30.5% H₂O₂ at a temperature below 50° gives bis(2-hydroxyethyl) disulfide, b_0.015 106°, m. 25-6°. S(C₂H₄OH)₂ and HOC₂H₄SH (100 g. total) in the ratio of 90:10, heated 75 min. at 90° with 400 cc. concentrated HCl, give 80.8% S(CH₂CH₂Cl)₂ (I); a ratio of 80:20 gives 69% I and a ratio of 70:30 gives 54.6% I. An equimol. ratio (61:39) gives (from 106 g. reaction product) 46% I, 20.6 g. crude (CH₂)₂(SC₂H₄Cl)₂, and some 1,17-dichloro-3,6,9,12,15-pentathiaheptadecane, Cl(C₂H₄S)₅C₂H₄Cl, amorphous, m. 100°. The following (CH₂)_n(SC₂H₄X)₂ were prepared by the method described in part II, using (CH₂)_nBr₂ and HSC₂H₄OH with EtONa, followed by reaction with SOCl₂; compounds with n = 0, 1, 3, and 4 were prepared to check the purity of previously reported compounds The empirical vesicant powers (V) are based on mustard gas= X=OH, X=Cl; B.p.,, mm., M.p.,, B.p.,, mm., M.p.,; n, °C., °C, °C., °C., V; 0, 106, 0.015, 25-6, 100, 0.5, -2 to 0, 1; 1, 114-15, 0.005, 18, 80-1, 0.03, 30.7, 200; 2, …, …, .., 140, 2, 57, 500; 3, 200, 4, 18, 86, 0.04, 11.5, 400-500; 4, 207, 3, 30, 104, 0.06 , -1, 400; 5, 210, 3, 30, 104, 0.003, -6, 200; 6, 130, 0.02, 45, 112, 0.03, 14-15, 50; 8, …, …, 60-1, .., …, 21-2, 1; 9, …, …, 63-4, .., …, 24, 1; 10, …, …, 70, .., …, 32, 1; 100.

Journal of the Chemical Society published new progress about 1002-41-1. 1002-41-1 belongs to chlorides-buliding-blocks, auxiliary class Aliphatic Chain, name is 1,2-Bis(2-chloroethyl)disulfane, and the molecular formula is C4H8Cl2S2, Quality Control of 1002-41-1.

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

Alexander, J. R. published the artcileAction of chloramine-T on disulfides containing the S-S linking, Quality Control of 1002-41-1, the publication is Journal of the Chemical Society (1932), 2087, database is CAplus.

The sulfide mol. ruptures at the S-S linking and each half reacts as a mercaptan. (ClCH₂CH₂)₂S₂ and chloramine-T give β-chloroethyl-p-toluenesulfonimidosulfine-p-toluenesulfonylimine, m. 154°; Et₂S₂ gives the corresponding Et derivative and Ph₂S₂ gives the Ph derivative

Journal of the Chemical Society published new progress about 1002-41-1. 1002-41-1 belongs to chlorides-buliding-blocks, auxiliary class Aliphatic Chain, name is 1,2-Bis(2-chloroethyl)disulfane, and the molecular formula is C4H8Cl2S2, Quality Control of 1002-41-1.

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

Fadeev, Alexander Y. published the artcileSelf-Assembly Is Not the Only Reaction Possible between Alkyltrichlorosilanes and Surfaces: Monomolecular and Oligomeric Covalently Attached Layers of Dichloro- and Trichloroalkylsilanes on Silicon, SDS of cas: 14799-94-1, the publication is Langmuir (2000), 16(18), 7268-7274, database is CAplus.

Si-supported alkylsiloxane layers were prepared by reaction of alkylmethyldichlorosilanes and alkyltrichlorosilanes with Si wafers under two conditions: (1) in the vapor phase and (2) in toluene in the presence of ethyldiisopropylamine. Covalent attachment of di- and trichlorosilanes to the surface of Si/Si oxide through Si_S-O-Si bonds occurs for the amine-catalyzed reactions. This sets apart this reaction from the self-assembly process that occurs in the reaction between certain trichlorosilanes and hydrated SiO₂ with no amine present. The thickness of the layers formed from dichloro- and trichlorosilanes (as assessed by ellipsometry) is on the order of the single mol. sizes and increases gradually with alkyl chain length. The thickness values are considerably smaller (by a factor of ∼0.75) than the length of the fully stretched alkyl chain, which argues for disordered structures of the monolayers. Dynamic advancing and receding contact angles for H₂O, methylene iodide, and hexadecane argue for interaction between the probe fluids and accessible silanol groups (Si-OH) on the surface. H₂O contact angles increase with alkyl chain length and level at θ_A/θ_R ≃103°/∼90° for relatively long alkyl chains (approx. C₆ and longer), indicating that these surfaces project disordered Me and methylene groups toward the probe fluid. N-Hexadecane and methylene iodide contact angles show more complex behavior, which is discussed. The vapor-phase reaction of di- and trichlorosilanes with Si wafers yields surfaces that depend dramatically on the alkyl chain of the silane. Alkylsilanes with short and medium chains form polymeric grafted layers with thicknesses ranging from a few nanometers for dichlorosilanes up to tens of nanometers for trichlorosilanes. The authors suggest a mechanism that involves polycondensation of chlorosilanes into 3-dimensional alkylsiloxanes in the presence of adsorbed H₂O. Dynamic advancing and receding contact angles of H₂O, methylene iodide, and hexadecane on these surfaces are consistently higher than for surfaces prepared in the liquid phase. Alkylsilanes with long alkyl moieties yield approx. monomol. layers that exhibit wettabilities similar to those for surfaces prepared in the liquid phase.

Langmuir 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, SDS of cas: 14799-94-1.

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

Fadeev, Alexander Y. published the artcileSelf-Assembly Is Not the Only Reaction Possible between Alkyltrichlorosilanes and Surfaces: Monomolecular and Oligomeric Covalently Attached Layers of Dichloro- and Trichloroalkylsilanes on Silicon, Application of Dichloro(methyl)(octyl)silane, the publication is Langmuir (2000), 16(18), 7268-7274, database is CAplus.

Si-supported alkylsiloxane layers were prepared by reaction of alkylmethyldichlorosilanes and alkyltrichlorosilanes with Si wafers under two conditions: (1) in the vapor phase and (2) in toluene in the presence of ethyldiisopropylamine. Covalent attachment of di- and trichlorosilanes to the surface of Si/Si oxide through Si_S-O-Si bonds occurs for the amine-catalyzed reactions. This sets apart this reaction from the self-assembly process that occurs in the reaction between certain trichlorosilanes and hydrated SiO₂ with no amine present. The thickness of the layers formed from dichloro- and trichlorosilanes (as assessed by ellipsometry) is on the order of the single mol. sizes and increases gradually with alkyl chain length. The thickness values are considerably smaller (by a factor of ∼0.75) than the length of the fully stretched alkyl chain, which argues for disordered structures of the monolayers. Dynamic advancing and receding contact angles for H₂O, methylene iodide, and hexadecane argue for interaction between the probe fluids and accessible silanol groups (Si-OH) on the surface. H₂O contact angles increase with alkyl chain length and level at θ_A/θ_R ≃103°/∼90° for relatively long alkyl chains (approx. C₆ and longer), indicating that these surfaces project disordered Me and methylene groups toward the probe fluid. N-Hexadecane and methylene iodide contact angles show more complex behavior, which is discussed. The vapor-phase reaction of di- and trichlorosilanes with Si wafers yields surfaces that depend dramatically on the alkyl chain of the silane. Alkylsilanes with short and medium chains form polymeric grafted layers with thicknesses ranging from a few nanometers for dichlorosilanes up to tens of nanometers for trichlorosilanes. The authors suggest a mechanism that involves polycondensation of chlorosilanes into 3-dimensional alkylsiloxanes in the presence of adsorbed H₂O. Dynamic advancing and receding contact angles of H₂O, methylene iodide, and hexadecane on these surfaces are consistently higher than for surfaces prepared in the liquid phase. Alkylsilanes with long alkyl moieties yield approx. monomol. layers that exhibit wettabilities similar to those for surfaces prepared in the liquid phase.

Langmuir 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, Application of Dichloro(methyl)(octyl)silane.

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

Rahimi, Marwa N. published the artcileProtein-protein inhibitor designed de novo to target the MEEVD region on the C-terminus of Hsp90 and block co-chaperone activity, Quality Control of 42074-68-0, the publication is Chemical Communications (Cambridge, United Kingdom) (2019), 55(6), 846-849, database is CAplus and MEDLINE.

Protein-protein interactions control all cellular functions. Presented is the 1st de novo designed protein-protein interaction inhibitor that targets the C-terminus of heat shock protein 90 (Hsp90) and blocks co-chaperones from binding. Compound LB76, which was created from an Hsp90 co-chaperone, selectively pulls down Hsp90 from cell lysates, binds to Hsp90’s C-terminal domain, and blocks the interactions between Hsp90 and TPR-containing co-chaperones. Through these interactions, LB76 inhibits the protein-folding function of Hsp90. Blocking these protein-protein interactions between Hsp90 and C-terminal co-chaperones regulate the cell’s entire protein-folding machinery.

Chemical Communications (Cambridge, United Kingdom) published new progress about 42074-68-0. 42074-68-0 belongs to chlorides-buliding-blocks, auxiliary class Chloride,Benzyl chloride,Benzene, name is 2-Chlorotrityl chloride, and the molecular formula is C19H14Cl2, Quality Control of 42074-68-0.

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

Buckton, Laura K. published the artcileImproving the Cell Permeability of Polar Cyclic Peptides by Replacing Residues with Alkylated Amino Acids, Asparagines, and D-Amino Acids, Product Details of C19H14Cl2, the publication is Organic Letters (2018), 20(3), 506-509, database is CAplus and MEDLINE.

The design, synthesis, and cell permeability of 19 hydrophilic macrocyclic peptides is presented. By systematically analyzing the impact of three different approaches (alkylated amino acids, asparagines, and D-amino acids) on the permeability of polar peptides, a well-defined strategy for optimizing cell permeability is provided. These three new methods can be used individually or in combination to effectively convert polar peptides into cell permeable mols., and the results can be applied to the rapidly expanding peptide therapeutic industry.

Organic Letters published new progress about 42074-68-0. 42074-68-0 belongs to chlorides-buliding-blocks, auxiliary class Chloride,Benzyl chloride,Benzene, name is 2-Chlorotrityl chloride, and the molecular formula is C19H14Cl2, Product Details of C19H14Cl2.

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

Laurens, J. B. published the artcileValidated method for quantitation of biomarkers for benzene and its alkylated analogues in urine, HPLC of Formula: 33697-81-3, the publication is Journal of Chromatography B: Analytical Technologies in the Biomedical and Life Sciences (2002), 774(2), 173-185, database is CAplus and MEDLINE.

A validated gas chromatog.-mass spectrometric method for the anal. of the metabolites of benzene and its alkylated analogs in urine is reported. A number of metabolites, as required by authorities for biomonitoring of industrial exposure to aromatic vapor, were analyzed simultaneously with preservation of quant. information concerning positional isomers. The use of this method replaces a combination of anal. methods required for the anal. of all these metabolites. Urine samples were subjected to acidic deconjugation followed by a derivatization step. Phenol, ortho-, meta-, para-cresol, mandelic acid, and ortho-, meta-, para-methylhippuric acid were analyzed as their corresponding ethoxycarbonyl derivatives, with single ion monitoring. The mass-to-charge ratios (m/z) of the ions used for quantitation by single ion monitoring of the metabolites were: phenol, 94 m/z; cresols, 108 m/z; mandelic acid, 206 m/z; hippuric acid, 105 m/z; methylhippuric acids, 119 m/z. The mass-to-charge ratios for the internal standards were: [²H₆]phenol, 99 m/z; p-chlorophenol, 128 m/z and 3-chloro-4-hydroxyphenyl acetic acid, 214 m/z. The limits of detection for phenol and the cresols were below 0.4 μmol/l and below 0.05 μmol/l for mandelic acid and the hippuric acids. Within-run precision for mandelic acid was 6.2%, for hippuric acid was 7.32% and was below 5% for the rest of the analytes.

Journal of Chromatography B: Analytical Technologies in the Biomedical and Life Sciences published new progress about 33697-81-3. 33697-81-3 belongs to chlorides-buliding-blocks, auxiliary class Chloride,Carboxylic acid,Benzene,Phenol, name is 3-Chloro-4-hydroxyphenylacetic acid, and the molecular formula is C8H7ClO3, HPLC of Formula: 33697-81-3.

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

Gutch, Pranav K. published the artcileN,N-Dichlorovaleramide: An Efficient Decontaminating Reagent for Sulfur Mustard, COA of Formula: C4H8Cl2S2, the publication is Industrial & Engineering Chemistry Research (2012), 51(16), 5830-5837, database is CAplus.

An efficient and operationally simple method for the chem. decontamination of sulfur mustard has been reported herein. A newly synthesized (pos. chlorine bearing) reagent N,N-dichlorovaleramide has been utilized for this purpose. Decontamination has been achieved in aqueous and aprotic media. The reaction was monitored by gas chromatog.-mass spectrometry and NMR spectroscopy. This reagent is more effective, stable, economical, and easy to synthesize and leads to instant decontamination of sulfur mustard. The reaction was found to instantaneously and completely convert sulfur mustard to innocuous products at different temperatures (-10 to 25 °C).

Industrial & Engineering Chemistry Research published new progress about 1002-41-1. 1002-41-1 belongs to chlorides-buliding-blocks, auxiliary class Aliphatic Chain, name is 1,2-Bis(2-chloroethyl)disulfane, and the molecular formula is C4H8Cl2S2, COA of Formula: C4H8Cl2S2.

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

Pena-Mendez, E. M. published the artcileMetal organic framework composite, nano-Fe₃O₄@Fe-(benzene-1,3,5-tricarboxylic acid), for solid phase extraction of blood lipid regulators from water, Related Products of chlorides-buliding-blocks, the publication is Talanta (2020), 120275, database is CAplus and MEDLINE.

The magnetic metal-organic framework Fe₃O₄@(Fe-(benzene-1,3,5-tricarboxylic acid) (MMOF) was prepared, characterized and studied as a magnetic sorbent for the dispersive solid-phase extraction (DSPE) of several widely used blood lipid regulators (i.e., bezafibrate, clofibric acid, clofibrate, gemfibrozil and fenofibrate) from water samples. Characterization of the synthesized Fe₃O₄@Fe-BTC magnetic nanomaterial was performed by Fourier transform IR spectroscopy, powder X-ray diffractometry, thermogravimetric anal., SEM and transmission electron microscopy. The magnetic nanocomposite was found to be chem. stable and to possess a large surface area (803.62 m²/g) and pore volume (0.59 cm³/g). The concentrations of fibrates in different water samples were determined using HPLC-UV-Vis and confirmed by UPLC-MS/MS. Parameters affecting the extraction efficiency of magnetic-DSPE were studied and optimized. The maxima absorption capacities (Q_max) were determined to be (in mg/g) 197.0 for bezafibrate, 620.3 for clofibric acid, 537.6 for clofibrate, 288.7 gemfibrozil and 223.2 for fenofibrate. Validations of the optimized magnetic DSPE method for analyses at two fibrate concentrations in spiked water samples produced relative recovery values ≤ 70% for clofibrate and within the range of 80-100% for bezafibrate, clofibric acid, gemfibrozil and fenofibrate. LODs ranging from 4μg/L for fenofibrate to 99μg/L for gemfibrozil were obtained. The validated methodol. produced recovery values ranging from 70 to 112% (relative standard deviations < 7%).

Talanta 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 C12H15ClO3, Related Products of chlorides-buliding-blocks.

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

Roszkowski, Piotr published the artcileNew N,N-diamine ligands derived from (-)-menthol and their application in the asymmetric transfer hydrogenation, Recommanded Product: Sodium chloro(tosyl)amide trihydrate, the publication is Tetrahedron: Asymmetry (2017), 28(4), 532-538, database is CAplus.

Natural (-)-menthol was applied to construction of mono-N-tosylated-1,2-diamine derivatives The O-tosylation and elimination of the tosylate of the menthol intermediate led to trans-p-menth-2-ene. The unsaturated menth-2-ene was next transformed into a mixture of N-tosylaziridines, which upon reaction with sodium azide gave four isomeric azides. The reduction of the formed tosylazides on Pd/C gave new chiral mono-N-tosylated-1,2-diamines, which were used as ligands in the asym. transfer hydrogenation protocol on aromatic ketones and endocyclic imine.

Tetrahedron: Asymmetry published new progress about 7080-50-4. 7080-50-4 belongs to chlorides-buliding-blocks, auxiliary class Halogenation Reagent,Inhibitor, name is Sodium chloro(tosyl)amide trihydrate, and the molecular formula is C7H13ClNNaO5S, Recommanded Product: Sodium chloro(tosyl)amide trihydrate.

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