18779-88-9

Usage

Chemical class

Aromatic hydrocarbon

Physical state

Colorless liquid

Odor

Strong, sweet

Solubility

Insoluble in water, soluble in organic solvents

Uses

a. Fragrance ingredient in perfumes, colognes, and other scented products
b. Potential applications in pharmaceutical and chemical industries

Safety

Handle with caution and follow proper safety protocols due to potential hazards if not used properly.

Upstream product

• 60070-06-6 1,2-bis(bromomethyl)-4,5-dimethylbenzene 
• 94678-94-1 1,2-Bis-<3,4-dimethyl-6-jodmethyl-phenyl-(1)>-ethan 
• 2362-16-5 1,2-bis(chloromethyl)-4,5-dimethylbenzene 
• 95-93-2 1,2,4,5-tetramethylbenzene 
• 3167-01-9 (2,4,5-trimethyl-phenyl)-acetic acid 
• 100-47-0 benzonitrile 
• 67-64-1 acetone 
• 17649-59-1 dimethyl 4,5-dimethylphthalate 
• 60070-05-5 1,2-bis(hydroxymethyl)-4,5-dimethylbenzene 
• 613-46-7 2-naphthalenecarbonitrile 
• 95-63-6 1,2,4-Trimethylbenzene 
• 107-06-2 1,2-dichloro-ethane 
• 101797-36-8 6,7-Dimethyl-tetralin-2-spiro-(3'-methyl-4',6'-dimethylen-2'-cyclohexen) 
• 91009-97-1 1,2,4,5-Tetrakis-(iodmethyl)-cyclohexan 

Downstream Products

• 89-32-7 Pyromellitic dianhydride 

Relevant academic research and scientific papers

Preparation method for pyromellitic dianhydride

The invention discloses a preparation method for pyromellitic dianhydride. The preparation method comprises the following steps: (1) reacting metachlorotoluene and dichloroethane for 0.5 to 5 hours inan organic solvent under the catalytic action of aluminium trichloride or ferric chloride, generating 2,2'4,4'5,5'-hexamethyldiphenyl ethane, hydrolysing, and removing the solvent to obtain a crude product of the 2,2'4,4'5,5'-hexamethyldiphenyl ethane; and (2) heating and gasifying the crude product of the 2,2'4,4'5,5'-hexamethyldiphenyl ethane, oxidizing through air at the reaction temperature of 350 to 500 DEG C under the action of a catalyst, and collecting the product to obtain the pyromellitic dianhydride. According to the preparation method for the pyromellitic dianhydride disclosed bythe invention, the product selectivity can reach over 90 percent, the yield is good, the cost is low, and industrial production can be realized.

Structural Effects in the TiO2-Photocatalyzed Oxidation of Alkylaromatic Compounds in Acetonitrile in the Presence of Ag2SO4

The TiO2-sensitized photochemical reactions of some alkylbenzenes (ArCH2R; R = H, Me), 1-aryl-2-propanols, and corresponding methyl esters (ArCH2C(OR'')R'CH3; R', R'' = H, Me) have been investigated in MeCN, in the presence of Ag2SO4, which traps the photogenerated electrons.With ArCH2R, the corresponding radical cations are generated by the photoexcited TiO2 and are then deprotonated to from benzyl radicals; from the latter 1,2-diarylethanes, 3-arylpropanonitriles, and benzylacetamides are obtained as major products.With ArCH2C(OR'')R'CH3, the formed radical cations undergo C-C bond cleavage as the only observed route, when Ar = Ph.However, when Ar = 4-MeOPh and R' = H, the radical cation undergoes C-H bond cleavage as the major or exclusive reaction path.These results are compared with those obtained in the corresponding homogeneous photochemical reactions, and their implications with respect to the role of the structure on the side-chain reactivity of aromatic radical cations are discussed.

Reductive Coupling by Chromium(0) - (Bibenzyl)- and (Stilbene)tricarbonylchromium(0) Complexes by a One-Pot Reaction from Benzylic Halides

Reaction of Cr(CO)3(NH3)3 with benzylic mono-, di-, and trihalides leads to the formation of 1,2-diarylethanes, -ethenes, and diphenylethyne in satisfactory yields.Di(halomethyl)benzene derivatives yield product mixtures containing both reduction products and coupling products.With a higher excess in chromium(0), under otherwise unchanged reaction conditions, the corresponding (arene)tricarbonylchromium(0) complexes of the coupling products are formed in a one-pot reaction from the benzylic halides.

PROTON TRANSFER REACTIONS OF PHOTOGENERATED CYANOAROMATIC-METHYLAROMATIC RADICAL ION PAIRS

The photochemical reactions of a number of cyanoaromatic (acceptor) and methylaromatic (donor) molecules have been investigated.These reactions can result in the formation of photosubstitution products or benzyl radical coupling products.A survey of our results and previously published data indicates that exergonic photostimulated electron transfer is a necessary but not sufficient condition for the observation of reaction products.The efficiency of proton transfer from the donor cation radical to the acceptor anion radical is determined by the kinetic acidity and basicity of the radical ion pair.Mechanistic evidence is presented which indicates that proton transfer requires diffusion apart and reencounter of the initially formed radical ion pair.Predominant radical pair combination is observed for anion radicals which yield electron-deficient free radicals upon protonation, whereas predominant cage escape and benzyl radical coupling is observed for anion radicals which yield electron-rich free radicals upon protonation.

PHOTOCHEMICAL REACTION OF 1- AND 2-NAPHTHALENECARBONITRILE WITH SOME METHYLBENZENES

1- and 2-Naphthalenecarbonitriles (1- and 2-NN) photochemically react with 1,2,4,5-tetramethylbenzene (4) (but not with lower homologues).The products are (1,1'-(1,2-ethanediyl)bis-(2,4,5-trimethylbenzene) (5) and 3-hydroxy-1-naphthalenecarbonitrile with

PHOTOCHEMICAL OXIDATION AND DIMERIZATION OF ALKYLBENZENES. SELECTIVE REACTIONS OF THE ALKYL SIDE GROUPS

Irradiations of alkylbenzene compounds in an oxygen atmosphere result exclusively in oxidation reactions, while in a less oxidative environment dimerization processes predominate.Under all conditions studied, the reactions took place only at one benzyl position.

SILVER(I)/ PERSULFATE OXIDATIVE DECARBOXYLATION OF CARBOXYLIC ACIDS. ARYLACETIC ACID DIMERIZATION.

The oxidative decarboxylation of arylacetic acids by sodium persulfate and a catalytic amount of silver nitrate produces benzylic radicals which dimerize cleanly to give 1,2-diarylethanes.