6224-55-1

Basic information

• Product Name: 2-methylbenzothiophene 1,1-dioxide
• Synonyms: 2-methylbenzothiophene 1,1-dioxide
• CAS NO: 6224-55-1
• Molecular Formula: C₉H₈O₂S
• Molecular Weight: 180.22
• Mol File: 6224-55-1.mol
• Article Data: 7

Chemical Properties

• Boiling Point: 368.1°C at 760 mmHg
• Flash Point: 233.2°C
• Appearance: /
• Density: 1.321g/cm³
• Vapor Pressure: 2.75E-05mmHg at 25°C
• Refractive Index: 1.606
• CAS DataBase Reference: 2-methylbenzothiophene 1,1-dioxide(CAS DataBase Reference)
• NIST Chemistry Reference: 2-methylbenzothiophene 1,1-dioxide(6224-55-1)
• EPA Substance Registry System: 2-methylbenzothiophene 1,1-dioxide(6224-55-1)

Safety Data

• Hazardous Substances Data: 6224-55-1(Hazardous Substances Data)

Usage

InChI:InChI=1/C9H8O2S/c1-7-6-8-4-2-3-5-9(8)12(7,10)11/h2-6H,1H3

Upstream product

• 1195-14-8 2-Methylbenzothiophene 
• 95-15-8 Benzo[b]thiophene 
• 88050-71-9 2-methyl-(8H)-cycloheptathiophen-8-one 
• 446-52-6 2-Fluorobenzaldehyde 
• 33945-86-7 2-Methylbenzothiophene sulfoxide 

Downstream Products

• 86559-04-8 4,4-dioxo-3a-methyl-3-(2,4,6-trimethylphenyl)-2,3-dihydrobenzothiopheno<2,3-d>isoxazoline 
• 89911-99-9 8,8-dioxo-8a-methyl-2,3-diphenyl-2,3-dihydrobenzothieno<3,2-d>isoxazolidine 
• 86558-95-4 4,4-dioxo-3a-methyl-2,3-diphenyl-2,3-dihydrobenzothieno<2,3-d>isoxazolidine 
• 6224-56-2 1,1-Dioxo-2-methyl-2,3-dihydro-1-benzothiophen 

Relevant articles and documents

Niobium(V) oxido tris-carbamate as easily available and robust catalytic precursor for the selective sulfide to sulfone oxidation

The oxidation of the sulfide function promoted by a variety of vanadium compounds has been largely explored, whereas the use of homogeneous catalytic systems based on the heavier group 5 metals remains less explored. We report the use of easily available niobium and tantalum carbamates, i.e. [M(O2CNMe2)5] (M = Nb, 1; M = Ta, 2), [Nb(O2CNMe2)4], 3, [NbO(O2CNEt2)3], 4, and [NbCl3(O2CNEt2)2], 5, as effective catalysts for the conversion of a series of alkyl aryl and aromatic sulfides into the corresponding sulfones. NMR investigations on the performant niobium catalyst 4 unexpectedly revealed the substantial stability of this compound in the protic catalytic environment, and a plausible catalytic cycle was obtained by DFT studies. The two active catalytic species, i.e. 4 and its minor mono-methoxide derivative, presumably interconvert to each other exploiting the versatile coordination of the carbamato ligand.

Method for preparing aromatic ring thiophthene-1,1-dioxide

The invention provides a method for preparing aromatic ring thiophthene-1,1-dioxide. The method comprises the following steps: carrying out one-step cyclization on an ortho-position substituted aromatic ring and sodium alkylsulfinate, and carrying out a dehydration reaction, thereby obtaining the aromatic ring thiophthene-1,1-dioxide. The ortho-position substituted aromatic ring is of a structureof a compound of formula (I) as shown in the description. Compared with synthesis routes of a conventional method, the method for preparing the aromatic ring thiophthene-1,1-dioxide, which is providedby the invention, is easy in raw material obtaining, low in cost, gentle in reaction, easy to control, small in waste generation, small in pollution, simple in aftertreatment and in addition applicable to preparation of all types of aromatic ring thiophthene-1,1-dioxide, novel strategies are provided for the aromatic ring thiophthene-1,1-dioxide, and high production and application values can bemade.

A Mn(III) polyoxotungstate in the oxidation of organosulfur compounds by H2O2 at room temperature: An environmentally safe catalytic approach

The tetrabutylammonium (TBA) salt of a Keggin-type polyoxometalate (POM), with the chemical formula TBA4H2[BW11Mn(H2O)O39]·H2O, TBABW11Mn, was evaluated as a catalyst in the oxidation by hydrogen peroxide of several organosulfur compounds, namely benzothiophene (BT), 2-methylbenzothiophene (2-MBT), 3-methylbenzothiophene (3-MBT), dibenzothiophene (DBT), 4-methyldibenzothiophene (4-MDBT) and 4,6-diethyldibenzothiophene (4,6-DEDBT), in acetonitrile at room temperature. All compounds were oxidized to their corresponding sulfones with high conversion and selectivity. Following the excellent results achieved, the BW11Mn/H2O2 in CH3CN system was tested in the oxidation of model fuels (MFs) consisting of a mixture of BTs and DBTs in hexane (MF1 containing mainly BTs and MF2 containing predominantly DBTs). In both cases, the organosulfur compounds from the model fuels were fully converted into their corresponding sulfones. Envisaging the development of a promising desulfurization procedure, the extraction of sulfur compounds from MF2 was attempted after the catalytic oxidation process. More than 98 mol% was removed using an ethanol/H2O mixture.