933671-83-1

Usage

Type of compound

Halogenated benzene derivative

Structure

Benzene ring with two methyl groups at the 3 and 5 positions, a bromine atom at the 1 position, and an iodine atom at the 2 position

Uses

Building block in organic synthesis and pharmaceutical manufacturing

Potential applications

Reagent in the synthesis of various biologically active compounds

Safety concerns

Potential toxicity and environmental impact; should be handled and disposed of with care

Upstream product

• 41825-73-4 2-bromo-4,6-dimethylaniline 

Downstream Products

• 110348-41-9 3,5-dimethyl-1,2-bis(phenylsulphonyl)benzene 
• 107774-56-1 3,5-dimethyl-1-(phenylsulphonyl)benzene 
• 4212-74-2 2,4-dimethylphenyl phenyl sulfone 

Relevant academic research and scientific papers

Ruthenium-Catalyzed Cycloisomerization of 2,2′-Diethynyl- biphenyls Involving Cleavage of a Carbon-Carbon Triple Bond

A ruthenium complex catalyzes a new cycloisomerization reaction of 2,2′-diethynylbiphenyls to form 9-ethynylphenanthrenes, thereby cleaving the carbon-carbon triple bond of the original ethynyl group. A metal-vinylidene complex is generated from one of th

GRAPHENE NANORIBBONS WITH CONTROLLED ZIG-ZAG EDGE AND COVE EDGE CONFIGURATION

Provided are graphene nanoribbons with controlled zig-zag edge and cove edge configuration and methods for preparing such graphene nanoribbons. The nanoribbons are selected from the following formulae.

Palladium-catalyzed aryl amination-heck cyclization cascade: A one-flask approach to 3-substituted indoles

(Chemical Equation Presented) Two for the price of one: A Pd/dppf-based catalyst provides access to the title compounds from 1,2-dihalogenated aromatic compounds and allylic amines in a single reaction flask. The initial aryl amination step occurs with excellent selectivity for the aryl iodide to ensure the formation of a single indole regioisomer, which can be functionalized in situ by N-arylation (see scheme). dba = dibenzylideneacetone, dppf = 1,1′-bis(diphenylphospanyl)ferrocene.

Electrochemical Reduction of Some o-Bis(phenylsulphonyl)benzene Derivatives. Effect of the Substrate Structure and of the Addition of Bases on the Product Distribution.

A study of the electrochemical behaviour of the o-bis(phenylsulphonyl)benzene derivatives (1a-e) in dimethyl sulphoxide containing 0.1M-tetrabutylammonium tetrafluoroborate has been undertaken.The results from cyclic voltammetry, controlled-potential electrolysis, and coulometry strongly argue in support of a mechanism involving initial formation of the radical anion (1)-. which fragments into the ? radical (2) and PhSO2-.Competing pathways for (2) are (a) intramolecular homolytic arylation eventually leading to dibenzothiophene (4) together with dihydrodibenzothiophene (5) derivatives and (b) hydrogen-atom transfer leading to monosulphones (6).The fact that compounds (1a,b) undergo mainly cyclization, whereas the hydrogen-atom transfer predominates in the case of compounds (1c,d), indicates that the structure of the starting substrate is a major governing factor for the above competition.An explanation, based on a concomitance of steric effects of the methyl groups ortho to the phenylsulphonyl substituents, is given.Experiments carried out in the presence of different bases show that the intramolecular arylation leading to the cyclized product can occur also through an unprecedented chain mechanism whose efficiency, which increases as the strength and the concentration of the base is increased, is found in turn to be dependent on the substrate structure.Finally, when arenethiolates are used as bases, a third pathways (the nucleophile-radical coupling step of the SRN1 process) is found to compete for the intermediate ? radical (2) eventually leading to sulphides resulting from the overall substitution of an arylthio for a moiety in (1).When the intramolecular cyclization does not compete efficiently almost quantitative yields of sulphides are obtained via an SRN1 route.