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1,4-bis(methylsulfanyl)benzene, also known as 4,4'-thiobis(methylbenzene) or 4,4'-methylenebis(2-methylphenol), is an organic compound with the chemical formula C8H10S2. It is a colorless to pale yellow crystalline solid that is soluble in organic solvents and has a molecular weight of 178.29 g/mol. 1,4-bis(methylsulfanyl)benzene is primarily used as a synthetic intermediate in the production of various chemicals, including antioxidants, pharmaceuticals, and agrochemicals. It is also known for its antioxidant properties and can be used to protect materials from oxidative degradation. Due to its potential health and environmental hazards, it is important to handle 1,4-bis(methylsulfanyl)benzene with care and follow proper safety guidelines.

699-20-7

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699-20-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 699-20-7 includes 6 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 3 digits, 6,9 and 9 respectively; the second part has 2 digits, 2 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 699-20:
(5*6)+(4*9)+(3*9)+(2*2)+(1*0)=97
97 % 10 = 7
So 699-20-7 is a valid CAS Registry Number.
InChI:InChI=1/C8H10S2/c1-9-7-3-5-8(10-2)6-4-7/h3-6H,1-2H3

699-20-7SDS

SAFETY DATA SHEETS

According to Globally Harmonized System of Classification and Labelling of Chemicals (GHS) - Sixth revised edition

Version: 1.0

Creation Date: Aug 15, 2017

Revision Date: Aug 15, 2017

1.Identification

1.1 GHS Product identifier

Product name 1,4-Bis(methylsulfanyl)benzene

1.2 Other means of identification

Product number -
Other names 1,4-dithiomethyl benzene

1.3 Recommended use of the chemical and restrictions on use

Identified uses For industry use only.
Uses advised against no data available

1.4 Supplier's details

1.5 Emergency phone number

Emergency phone number -
Service hours Monday to Friday, 9am-5pm (Standard time zone: UTC/GMT +8 hours).

More Details:699-20-7 SDS

699-20-7Relevant academic research and scientific papers

Palladium-catalyzed intermolecular transthioetherification of aryl halides with thioethers and thioesters

Li, Yahui,Bao, Gao,Wu, Xiao-Feng

, p. 2187 - 2192 (2020/03/11)

Functional group transfer reactions are an important synthetic tool in modern organic synthesis. Herein, we developed a new palladium-catalyzed intermolecular transthioetherification reaction of aryl halides with thioethers and thioesters. The synthetic utility and practicality of this catalytic protocol are demonstrated in a wide range of successful transformations (>70 examples). This catalytic protocol is applicable in carbonylative coupling processes as well, and the first example of carbonylative methylthioesterification of aryl halides has been achieved. Notably, this work also provides an approach to using natural products, such as methionine and selenomethionine, as the functional group sources.

β-alkyl substituted dithieno[2,3-d;2′,3′-d′]benzo[1, 2-b;4,5-b′]dithiophene semiconducting materials and their application to solution-processed organic transistors

Kim, Jonggi,Yang, Changduk,Han, A-Reum,Oh, Joon Hak,Seo, Jung Hwa

, p. 3464 - 3472,9 (2020/08/24)

A novel highly π-extended heteroacene with four symmetrically fused thiophene-ring units and solubilizing substituents at the terminal β-positions on the central ring, dithieno[2,3-d;2′,3′-d′] benzo[1,2-b;4,5-b′]dithiophene (DTBDT) was synthesized via int

Copper-mediated methylthiolation of aryl halides with DMSO

Luo, Fang,Pan, Changduo,Li, Liping,Chen, Fan,Cheng, Jiang

supporting information; experimental part, p. 5304 - 5306 (2011/06/21)

A copper-mediated methylthiolation of aryl halides with the widely available DMSO is described. The procedure tolerates a series of functional groups such as methoxy, nitro, chloro, fluoro, trifluoromethyl, formyl and methoxycarbonyl groups. Thus, it represents a simple and facile methylthiolation procedure.

Frustrated rotations in single-molecule junctions

Park, Young S.,Widawsky, Jonathan R.,Kamenetska, Maria,Steigerwald, Michael L.,Hybertsen, Mark S.,Nuckolls, Colin,Venkataraman, Latha

supporting information; experimental part, p. 10820 - 10821 (2009/12/03)

(Graph Presented) We compare the conductance of 1,4-bis(methylthio)benzene with that of 2,3,6,7-tetrahydrobenzo[1,2-b:4,5-b′]dithiophene and the conductance of 1,4-bis(methylseleno)benzene with that of 2,3,6,7- tetrahydrobenzo[1,2-b:4,5-b′]diselenophene a

Conjugated ladder-type heteroacenes bearing pyrrole and thiophene ring units: Facile synthesis and characterization

Gao, Peng,Feng, Xinliang,Yang, Xiaoyin,Enkelmann, Volker,Baumgarten, Martin,Muellen, Klaus

supporting information; experimental part, p. 9207 - 9213 (2009/04/11)

(Chemical Equation Presented) Ladder-type heteroacenes containing pyrrole and thiophene rings, dibenzo[b,b′]thieno[2,3-f:5,4-f′]-carbazoles (DBTCZ, 1), and diindolo[3,2-b:2′,3′-h]benzo[1],2-b:4,5-b′] bis[1]benzothiophene (DIBBBT, 2), were facilely synthes

Photoinduced nucleophilic substitution of aryl halides with potassium thioacetate - A one-pot approach to aryl methyl and diaryl sulfides

Schmidt, Luciana C.,Rey, Valentina,Penenory, Alicia B.

, p. 2210 - 2214 (2007/10/03)

Aryl methyl sulfides and diaryl sulfides were prepared by photoinduced reactions of potassium thioacetate with aryl halides under entrainment conditions. Without isolation, the arene thiolates obtained by the aromatic substitution were quenched with methyl iodide to afford the aryl methyl sulfides in 26-59% yields in a "one-pot" procedure together with the diaryl sulfides in variable yields (3-31 %). By optimization of the reaction conditions it was possible to improve the formation of the Ar2S, going from moderate to good yields (64-83%). Wiley-VCH Verlag GmbH & Co. KGaA, 2006.

Dithia-s-indacene derivative

-

Page/Page column 8, (2010/02/14)

A 1,5-dithia-s-indacene or 1,7-dithia-s-indacene derivative represented by general formula (1): wherein R1 and R2 each independently represents a hydrogen atom, an alkyl group or an alkoxy group; R3-R12 each ind

One-Pot Two-Step Synthesis of Aryl Sulfur Compounds by Photoinduced Reactions of Thiourea Anion with Aryl Halides

Argueello, Juan E.,Schmidt, Luciana C.,Penenory, Alicia B.

, p. 4133 - 4136 (2007/10/03)

(Equation presented) The photoinduced reactions of aryl halides with the thiourea anion afford arene thiolate ions in DMSO. These species without isolation, and by a subsequent aliphatic nucleophilic substitution, S RN1 reaction, oxidation, or protonation, yield aryl methyl sulfides, diaryl sulfides, diaryl disulfides, and aryl thiols with good yields (50-80%). This is a simple and convenient approach which involves the use of the commercially available and inexpensive thiourea in a one-pot two-step process for the synthesis of aromatic sulfur compounds.

Evidence for intermolecular interaction between sulfonium and sulfide sulfur atoms and its application to synthesis of cyclic bis(disulfide) dimer

Kobayashi,Koyama,Kono,Namatame,Nakamura,Furukawa

, p. 2085 - 2090 (2007/10/03)

On the basis of the remote Pummerer reaction of p-bis(alkylthio)-aromatic S-oxide, the intermolecular interaction between the sulfonium and sulfide sulfur atoms is described. (1) In marked contrast to the Pummerer reaction of 1b-d3 with (CF3CO)2O (J. Org. Chem. 1999, 64, 3190-3195), the reaction of 3,3′,5,5′-tetramesityl-4-(trideuteriomethylsulfinyl)-4′- (methylthio)biphenyl (1a-d3) as a sterically hindered analogue of 1b gave only 2a-d2. (2) Both reactions of the two unsymmetrical regioisomers of 1-(ethylthio)-4-(methylthio)benzene S-oxide (5a and 5b) with (CF3CO)2O afforded a mixture of the mono-Pummerer products 6a and 6b, the bis-Pummerer product 7, and the bissulfide 8 in a similar ratio. The quenching at the initial stage of both reactions produced 5a, 5b, 8, and the bis-sulfoxide 10 in a similar ratio. These results indicate the equilibrium in the intermolecular interaction between the sulfur atoms. (3) The reaction of the p-bis(benzylthio)aromatic S-oxide 16 with (CF3SO2)2O gave the cyclic bis(disulfide) dimer 17 for the diphenyl sulfide and diphenylmethane spacers or the cyclic tetrakis(disulfide) tetramer 19 for the benzene and biphenyl spacers via the debenzylation of an intermolecular dithia dication. The cyclic bis(dithia dication) dimer A resulting from the intermolecular interaction between the sulfonium and sulfide sulfur atoms is proposed as an intermediate throughout the present reactions.

Electrochemical electrophilic aromatic methylthiation in liquid SO2

Glass, Richard S.,Jouikov, Viatcheslav V.

, p. 6357 - 6358 (2007/10/03)

Controlled potential electrolysis of dimethyldisulfide in liquid sulfur dioxide provides a strongly electrophilic methylthiating agent. This species methylthiates strongly to weakly activated arenes in good to excellent yield.

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