A novel process by which benzene derivatives substituted by an aromatic ring which are represented by general formula (9) are produced in high yield from an inexpensive material under mild reaction conditions. [In the formula, X represents an optionally substituted benzene ring, optionally substituted...
Annelation of 2,5-disubstituted pyrroles provides a useful route toisoindolesas shown in reactions(140)–(142). These reactions can be formulated aselectrophilic aromatic substitutionsof the pyrrole ring and proceed under the influence of acid catalysts〈66T2481, 68JCS(C)3036, 72JCS(P1)904〉....
Aromatic hydrocarbons such as benzene, toluene, ethyl- benzene, and xylene (collectively labelled: BTEX) are natural components of the petroleum stream and exposure to these agents in the offshore work environment may occur during production control and maintenance of the process systems that separate...
In the ring-fused BODIPY dimer 2, the central benzene ring is largely deviated from the aromatic benzene geometry. As a consequence, 2 has a significantly low-lying LUMO delocalized along the periphery. In cyclic voltammograms, the benzene-fused BODIPY 1 and fully-fused dimer 2 indeed showed ...
C6H5CH3+ H2→ C6H6+ CH4. Hydrodealkylation strips the methyl group from toluene to produce benzene. Toluene disproportionation involves combining toluene so that the methyl groups bond to one aromatic ring, producing benzene and xylene. Benzene can also be obtained from petroleum reforming in which...
Aromatic compounds having at least two hydroxyl groups on a benzene ring can be selectively converted to the corresponding monoether by reaction with an alkylating agent in the presence of an alkaline earth hydroxide or oxide in a single phase reaction medium comprising a dipolar aprotic solvent hav...
Benzene, a liquid hydrocarbon molecule, contains a unique benzene ring composed of six carbon atoms in a hexagonal configuration with alternating single and double bonds, giving it its aromatic nature.. Who is the queen of chemicals, and why?People like to call different chemicals the "queen of...
, with the chemical formula C9H12, has the CAS number 526-73-8. It is a colorless liquid with a strong aromatic odor. The basic structure of 1,2,3-Trimethylbenzene consists of a benzene ring with three methyl groups attached to different carbon atoms. This compound is insoluble in water...
In the absence of a product shape-selectivity effect, the monoalkylation of benzene is followed by the formation of other polyalkylates, since the benzene aromatic ring is activated in the presence of an alkyl group. Therefore, in order to obtain high EB selectivity, it is advisable to ...
This means that the interaction between the ester group and the aromatic solvent is strong enough to produce not only the splitting in the external part of the n-alkyl side-chain in the presence of the N-male- imido ring but also the splitting after its hydro- genation. So far we have...