Month: December 2022

Hanaoka, Shigeyuki published the artcileDetermination of mustard and lewisite related compounds in abandoned chemical weapons (Yellow Shells) from sources in China and Japan, Application In Synthesis of 1002-41-1, the publication is Journal of Chromatography A (2006), 1101(1-2), 268-277, database is CAplus and MEDLINE.

Knowledge of the states of the contents in chem. munitions that Japanese Imperial Forces abandoned at the end of World War II in Japan and China is gravely lacking. To unearth and recover these chem. weapons and detoxify the contents safely, it is essential to establish anal. procedures to definitely determine the CWA contents. We established such a procedure and applied it to the anal. of chems. in the abandoned shells. Yellow shells are known to contain sulfur mustard, lewisite, or a mixture of both. Lewisite was analyzed without thiol derivatization, because it and its decomposition products yield the same substances in the derivatization. Anal. using our new procedure showed that both mustard and lewisite remained as the major components after the long abandonment of ∼60 yr. The content of mustard was 43% and that of lewisite 55%. The viscous material found was suggested to be mostly oligomers of mustard. Comparison of the components in the Yellow agents with mustard recovered in both Japan and China showed a difference in the impurities between the CWAs produced by the former Imperial navy and those by the former Imperial army.

Journal of Chromatography A 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, Application In Synthesis of 1002-41-1.

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

Gorst-Allman, Charles P. published the artcileSynthetic approaches to the austocystins, mycotoxins from Aspergillus ustus. Part I, Name: 3-Chloro-2,6-dimethoxybenzoic acid, the publication is South African Journal of Chemistry (1978), 31(4), 143-8, database is CAplus.

Two approaches to the synthesis of ustocystin A (I) were investigated. 2,6-(MeO)₂C₆H₃CO₂H was converted into the 3-Cl derivative (II) by chlorination with SO₂Cl₂. The acid chloride of II was treated with 2,4,6-(MeO)₃C₆H₂Li to give III (R = Me), which was selectively demethylated to give III (R = H; IV). Alk. condensation of IV gave 2 xanthoses V [R = H, R¹ = Cl; R = Cl, R¹ = H (VI)] in a 12:1 ratio. VI was the desired xanthone for I preparation The focal point of the second approach was the use of a 4-methylcoumarin as a masked dehydrofurobenzofuran. VII was necessary for this approach but its isomer VIII (R = Me) was obtained. The x-ray structure of VIII (R = H) was determined

South African Journal of Chemistry published new progress about 36335-47-4. 36335-47-4 belongs to chlorides-buliding-blocks, auxiliary class Chloride,Carboxylic acid,Benzene,Ether, name is 3-Chloro-2,6-dimethoxybenzoic acid, and the molecular formula is C9H9ClO4, Name: 3-Chloro-2,6-dimethoxybenzoic acid.

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

Ishiyama, Tatsuo published the artcileRoom temperature borylation of arenes and heteroarenes using stoichiometric amounts of pinacolborane catalyzed by iridium complexes in an inert solvent, Recommanded Product: Methyl 3-chloro-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzoate, the publication is Chemical Communications (Cambridge, United Kingdom) (2003), 2924-2925, database is CAplus and MEDLINE.

Aromatic C-H borylation of arenes and heteroarenes using stoichiometric amounts of pinacolborane was catalyzed by an Ir complex generated from 1/2[Ir(OMe)(COD)]₂ and 4,4′-di-tert-butyl-2,2′-bipyridine at room temperature in hexane and afforded the corresponding aryl- and heteroarylboronates in high yields with excellent regioselectivities.

Chemical Communications (Cambridge, United Kingdom) published new progress about 408492-29-5. 408492-29-5 belongs to chlorides-buliding-blocks, auxiliary class Chloride,Boronic acid and ester,Benzene,Ester,Boronate Esters,Boronate Esters,Boronic acid and ester,, name is Methyl 3-chloro-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzoate, and the molecular formula is C14H18BClO4, Recommanded Product: Methyl 3-chloro-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzoate.

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

Chung, Woojung published the artcileTime-Resolved Observation of Chiral-Index-Selective Wrapping on Single-Walled Carbon Nanotube with Non-Aromatic Polysilane, Product Details of C7H16Cl2Si, the publication is Journal of the American Chemical Society (2013), 135(6), 2374-2383, database is CAplus and MEDLINE.

In the present paper, we ascertain two novel findings on chiral-index-selective binding/separating of single-walled carbon nanotubes (SWNTs) with a nonaromatic polymer, poly(dialkylsilane) (PSi). PSi is a typical σ-conjugated polymer, composed of alkyl side chains attached to the silicon (Si)-catenated main chain. First, PSi’s with linear alkyl side chains showed significant diameter-selective wrapping for SWNTs with ca. 0.9 nm in diameter, resulting in the selective separation of (7,6) and (9,4) SWNTs. Its driving force was demonstrated to be cooperative CH-π interactions among the alkyl side chains of PSi’s and the curved graphene of SWNTs. Second, the dynamic wrapping behavior of PSi’s onto SWNTs was elucidated with time-resolved UV spectroscopy. Highly anisotropic UV absorption of PSi along the Si main chain was utilized as a “chromophoric indicator” to monitor the global/local conformations, which enabled us to track kinetic structural changes of PSi’s on SWNTs. Consequently, we concluded that upon wrapping, flexible/helical PSi with an average dihedral angle (φ) of 145° and Kuhn’s segment length (λ^-1) of 2.6 nm interconverted to the more stiffer/planar conformation with 170° and λ^-1 of 7.4 nm. Furthermore, through kinetic analyses of the time-course UV spectra, we discovered the fact that PSi’s involve three distinct structural changes during wrapping. That is, (i) the fast adsorption of several segments within dead time of mixing (<30 ms), following (ii) the gradual adsorption of loosely wrapped segments with the half-maximum values (τ₁) of 31.4 ms, and (iii) the slow rearrangement of the entire chains with τ₂ of 123.1 ms, coupling with elongation of the segment lengths. The present results may be useful for rational design of polymers toward chiral-index-selective binding/separating of desired (n,m) SWNTs.

Journal of the American Chemical Society 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, Product Details of C7H16Cl2Si.

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

Chung, Woojung published the artcileTime-Resolved Observation of Chiral-Index-Selective Wrapping on Single-Walled Carbon Nanotube with Non-Aromatic Polysilane, Name: Dichloro(methyl)(octyl)silane, the publication is Journal of the American Chemical Society (2013), 135(6), 2374-2383, database is CAplus and MEDLINE.

In the present paper, we ascertain two novel findings on chiral-index-selective binding/separating of single-walled carbon nanotubes (SWNTs) with a nonaromatic polymer, poly(dialkylsilane) (PSi). PSi is a typical σ-conjugated polymer, composed of alkyl side chains attached to the silicon (Si)-catenated main chain. First, PSi’s with linear alkyl side chains showed significant diameter-selective wrapping for SWNTs with ca. 0.9 nm in diameter, resulting in the selective separation of (7,6) and (9,4) SWNTs. Its driving force was demonstrated to be cooperative CH-π interactions among the alkyl side chains of PSi’s and the curved graphene of SWNTs. Second, the dynamic wrapping behavior of PSi’s onto SWNTs was elucidated with time-resolved UV spectroscopy. Highly anisotropic UV absorption of PSi along the Si main chain was utilized as a “chromophoric indicator” to monitor the global/local conformations, which enabled us to track kinetic structural changes of PSi’s on SWNTs. Consequently, we concluded that upon wrapping, flexible/helical PSi with an average dihedral angle (φ) of 145° and Kuhn’s segment length (λ^-1) of 2.6 nm interconverted to the more stiffer/planar conformation with 170° and λ^-1 of 7.4 nm. Furthermore, through kinetic analyses of the time-course UV spectra, we discovered the fact that PSi’s involve three distinct structural changes during wrapping. That is, (i) the fast adsorption of several segments within dead time of mixing (<30 ms), following (ii) the gradual adsorption of loosely wrapped segments with the half-maximum values (τ₁) of 31.4 ms, and (iii) the slow rearrangement of the entire chains with τ₂ of 123.1 ms, coupling with elongation of the segment lengths. The present results may be useful for rational design of polymers toward chiral-index-selective binding/separating of desired (n,m) SWNTs.

Journal of the American Chemical Society 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, Name: Dichloro(methyl)(octyl)silane.

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

Kitaoka, Satoshi published the artcilePyridinium-based ionic liquids incorporating disulfide bond: reversible control of phase separation property with water, Name: 1,2-Bis(2-chloroethyl)disulfane, the publication is Chemistry Letters (2018), 47(3), 362-364, database is CAplus.

Water-insoluble pyridinium-based ionic liquids with a disulfide bond were prepared Reduction of these ionic liquids using sodium hydrosulfite changed the water solubilities of the ionic liquids because the structural exchange of disulfide into thiol groups increased their polarities. Such a structural change by oxidation-reduction enabled reversible control of the phase separation property of ionic liquids with water.

Chemistry Letters 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, Name: 1,2-Bis(2-chloroethyl)disulfane.

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

Tsunashima, Katsuhiko published the artcileThermal and transport properties of ionic liquids based on benzyl-substituted phosphonium cations, Related Products of chlorides-buliding-blocks, the publication is Journal of Physical Chemistry B (2009), 113(48), 15870-15874, database is CAplus and MEDLINE.

The physicochem. properties of two novel ionic liquids based on benzyltriethylphosphonium and benzyltributylphosphonium cations are described in this report. It was found that both benzyl-substituted phosphonium cations gave low-melting salts in combination with a bis(trifluoromethylsulfonyl)amide anion. The thermogravimetric anal. suggested that the benzyl-substituted phosphonium ionic liquids showed higher thermal stability than those of not only the alkyl-substituted phosphonium ILs but also the corresponding benzyl-substituted ammonium compounds The benzyl-substituted phosphonium ionic liquids also exhibited relatively high conductivities when compared to those of the corresponding ammonium compounds These results indicate an improving effect of introducing a benzyl group into the phosphonium cations on both the thermal stability and the conductivity

Journal of Physical Chemistry B published new progress about 23616-79-7. 23616-79-7 belongs to chlorides-buliding-blocks, auxiliary class Phase Transfer Catalyst, name is N-Benzyl-N,N-dibutylbutan-1-aminium chloride, and the molecular formula is C12H10F2Si, Related Products of chlorides-buliding-blocks.

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

Shimamura, Satoshi published the artcileEffects of anti-auxins on secondary aerenchyma formation in flooded soybean hypocotyls, SDS of cas: 33697-81-3, the publication is Plant Production Science (2016), 19(1), 154-160, database is CAplus.

In flooded hypocotyl of soybean (Glycine max), cell division in phellogen and the elongation of these cells are enhanced, and thereby a secondary aerenchyma with high porosity is produced. Auxin controls cell division and cell elongation in many plants, so we studied its role in secondary aerenchyma development. Soybean plants with fully expanded unifoliolate leaves were flooded for 6 d with solutions (100μM each) of seven anti-auxins. TIBA, NPA, HFCA, 1-NOA, or CHPAA did not restrict the secondary aerenchyma formation, while MH moderately suppressed the aerenchyma development, and PCIB strongly inhibited the development of phellogen and secondary aerenchyma. However, the endogenous IAA concentrations in the flooded hypocotyls did not increase or decrease relative to the controls until 72 h, when a secondary aerenchyma was observed From these results, it is unclear whether auxin plays an important role in the process of secondary aerenchyma formation under flooding.

Plant Production Science 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 C7H8BFO2, SDS of cas: 33697-81-3.

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

Itoh, Miki published the artcilePreparation and evaluation of two-dimensional polymer films by chemical modification of an alkanethiol self-assembled monolayer for protection of copper against corrosion, HPLC of Formula: 14799-93-0, the publication is Journal of the Electrochemical Society (1995), 142(11), 3696-704, database is CAplus.

Chem. modification of an 11-mercapto-1-undecanol (MUO) self-assembled monolayer chemisorbed on the Cu surface with alkyltrichlorosilanes (C_nTCS) has improved the protective ability of the monolayers against corrosion of Cu in aqueous and atm. environments. Further improvements of the ability were studied by modification of the MUO self-assembled layer adsorbed on Cu with tetrachlorosilane (TCS) and 1,2-bis(trichlorosilyl)ethane (BTSCE) for constructing a two-dimensional polymer structure in the assembly layer on the surface. The TCS or BTSCE-modified MUO monolayer was further treated with coupling agents like octyldimethylchlorosilane, octylmethyldichlorosilane, and octyltrichlorosilane. The modified monolayers were characterized by FTIR reflection spectroscopy and contact angle measurements. Although the protective abilities of the modified layers against the cathodic reaction of Cu corrosion in aerated 0.5M Na₂SO₄ were not necessarily increased remarkably from those of the C_nTCS-modified MUO monolayers, network structures arising from two-dimensional polymerization with lateral siloxane linkages between mols. adsorbed on Cu resulted in enhancement of the protective ability against the anodic process.

Journal of the Electrochemical Society 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, HPLC of Formula: 14799-93-0.

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

Geethanjali, Y. published the artcileSynthesis and antimicrobial activity of 7-(β-t-alkylaminoalkoxy)-8-benzoyl-4-methyl coumarins, Synthetic Route of 4584-49-0, the publication is Indian Journal of Heterocyclic Chemistry (1995), 4(4), 307-8, database is CAplus.

Title compounds were prepared by reaction of 7-hydroxy-8-benzoyl-4-methylcoumarin with various alkylaminoalkyl chloride hydrochlorides and were screened for antimicrobial activity. 7-(3-Piperidinopropoxy)-8-benzoyl-4-methylcoumarin showed marked antifungal and antibacterial activity.

Indian Journal of Heterocyclic Chemistry published new progress about 4584-49-0. 4584-49-0 belongs to chlorides-buliding-blocks, auxiliary class Chloride,Salt,Amine,Aliphatic hydrocarbon chain, name is 2-Chloro-N,N-dimethylpropan-1-amine hydrochloride, and the molecular formula is C5H13Cl2N, Synthetic Route of 4584-49-0.

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