.beta.-(N,N-Dialkylamino)ethyl arylthiosulfonates: new simulants for O-ethyl S-[2-(diisopropylamino)ethyl] methylphosphonothioate
摘要:
Beta-(N,N-Dialkylamino)ethyl arylthiosulfonates 2, new simulants for the hydrolysis and oxidation chemistry of VX (1), are prepared in good yield by reaction of a potassium arylthiosulfonate with a 2-chloroethylamine. Alkaline hydrolysis of 2 results in cleavage of the S-S bond to give sulfinic acids and disulfides. Like VX, oxidation of 2 by N-sulfonyloxaziridine 12 occurs exclusively on nitrogen to give the corresponding amine oxide which subsequently undergoes a Cope elimination reaction affording the vinyl sulfide 14.
Visible-light C–heteroatom bond cleavage and detoxification of chemical warfare agents using titania-supported gold nanoparticles as photocatalyst
作者:Ştefan Neaţu、Bogdan Cojocaru、Vasile I. Pârvulescu、Vasile Şomoghi、Mercedes Alvaro、Hermenegildo Garcia
DOI:10.1039/c0jm00345j
日期:——
Gold nanoparticles supported on TiO2 effect the detoxification of soman and VX nerve gases and yperite vesicant agent at room temperature upon visible light illumination.
METHOD AND DEVICE FOR THE DETECTION OF SULPHUR CONTAINING SPECIES
申请人:Fallis Ian
公开号:US20130224873A1
公开(公告)日:2013-08-29
A method is provided for detecting sulphur-containing species (such as thiophosphorous esters, in particular phosphorylating agents), in which a suspected sulphur-containing species is brought into contact with a tetrazolium compound in the presence of base, typically at a pH of at least 8. A device, kit and tetrazolium compounds for use in such a method are also disclosed.
Eight-arm polyethylene glycol derivative, production method therefor, and modified bio-related substance thereof
申请人:Xiamen Sinopeg Biotech Co., Ltd.
公开号:US10660969B2
公开(公告)日:2020-05-26
Disclosed are an 8-arm polyethylene glycol (PEG) derivative (formula 1), manufacturing method and modified bio-related substance thereby, wherein a tetravalent group U and four trivalent groups Ec form a highly symmetric octavalent central structure CORE0 together, Lc connects the octavalent center to eight PEG arms having polydiversity or monodiversity and having n1-n8 as the degrees of polymerization thereof. The terminal of one PEG chain is connected to at least one functional group F (k≥1), and said PEG chain and F can be directly connected (g=0) or connected with a divalent linking group L0 connected with a terminal branched group G (g=1) therebetween. The latter provides more reacting sites to combine more pharmaceutical molecules, thereby increasing the drug loading capacity. The near-center symmetric structure of the derivative allows more precise control over the molecular weight during large-scale production, thereby facilitating acquisition of a product having a narrower molecular weight distribution. A bio-related substance modified thereby has a more uniform and controllable performance.
Analysis of Chemical Neutralization Products of Phosphonothiolates by Gas Chromatography Mass Spectrometry
作者:A. K. Gupta、M. Palit、D. K. Dubey、S. K. Raza
DOI:10.1080/10426500307845
日期:2003.8.1
A series of phosphonothiolates, including the highly toxic O-Ethyl-S-(2-diisopropylamino) ethyl methylphosphonothioate (VX), have been subjected to chemical neutralization reaction with metallic sodium. The phosphonothiolates decompose to their respective phosphonic and phosphonothioic acids and this results in the detoxification of VX. GC/MS technique in both EI and CI mode has been applied for reaction monitoring and final identification of the neutralization products formed in this reaction.
Synthesis of Bis[1,2]dithiolo[1,4]thiazines and a [1,2]Dithiolo[1,4]thiazine from Tertiary Diisopropylamines
作者:Charles W. Rees、Andrew J. P. White、David J. Williams、Oleg A. Rakitin、Lidia S. Konstantinova、Carlos F. Marcos、Tomás Torroba
DOI:10.1021/jo9902345
日期:1999.7.1
The reaction of N-(2-chloroethyl)diisopropylamine 1a with S2Cl2 allows the selective one-pot preparation of the tricyclic 4-(2-chloroethyl) bisdithiolothiazines 2-4 or, by addition of phosphorus pentasulfide at a rate stage in the reaction, of the dithiolothiazine 5. The chloroethyl derivative 2 is also obtained from (2-diisopropylamino)ethanethiol 1b, or its disulfide 1c, with S2Cl2, in a rare conversion of a thiol or disulfide into the corresponding chloro compound. Compounds 2 and 5 are also obtained from N-(2-hydroxyethyl)diisopropylamine 1d, though in much lower yields. The reaction of N-(2-phenylthioethyl) (1e) or N-(2-phthalimidoethyl)diisopropylamines 1f,g affords bisdithiolothiazines 7, 8, 9, and 11 and the dithiolopyrrole 10, A coherent set of reaction pathways for the formation of these products is proposed. X-ray crystallography shows that the bisdithiolothiazine ring system of 2 is folded out of planarity about the thiazine N-S vector, with the N-chloroethyl group folded back over the thiazine ring with the chlorine atom lying above the thiazine sulfur atom; the dithiolothiazine ring system of 5 has the thiazine ring in a "sofa" conformation.