Pollution by crude oil is wide spread and a common problem, and particularly endemic in countries whose economies are dependent on the oil industry. Such pollution arises either accidentally or operationally wherever oil is produced, transported, stored, processed or used. Benzene contamination of soil may also occur due to oil production facilities and coastal refineries. This problem arises b...

Photocycloadditions of benzene derivatives with alkenes play an important role as key steps in organic synthesis. Intramolecular reactions have been most frequently studied this context. Often, meta or [2 + 3] photocycloadditions take place competition ortho 2] additions. The influence the substitution pattern and spin multiplicity excited state on outcome these is discussed. A topological anal...

Abstract A capture reaction of hexadehydro-Diels–Alder (HDDA) derived benzyne with various substituted oxazoles is reported. With methyl, hydrogen, or phenyl as the substituent at 2-position oxazole, tetraynes afforded epoxyanthracene derivatives underwent dicarbonylation on benzene ring. The does not require any catalyst additive. mechanism behind was investigated. obtained polycyclic product ...

Indole is a benzopyrrole in which the benzene and pyrrole rings are fused through the 2-and 3-positions of the pyrrole nucleus. The indole derivatives are very much used as anticonvulsant agents. In the same context, several indole derivatives were prepared by the reaction between indole-3carboxaldehyde and various p-substituted phenylsemicarbazides, in the presence of glacial acetic acid. The ...

The title compound, C(13)H(13)ClN(2)O(3), was synthesized in the course of the search for novel bioactive pyrimidine derivatives. The C-O-C angle at the phen-oxy O atom is widened to 119.87 (18)°. The dihedral angle between the pyrimidine and benzene rings is 64.2 (3)°.

Fourteen triethylamine derivatives including the 2-(4-chlorophenylthio)triethylamine (CPTA) were all found to be effective in inducing the formation of lycopene in Marsh white seedless grapefruit (Citrus paradisi, Rutaceae); however, they differed in the degree of effectiveness. The structural feature necessary for inducer activity appeared to be the tertiary alkylamine. Compounds with an S ato...

1-Carbamoyl-2-oxopropyl acetate derivatives were synthesized through an acetoxylation process to methylene with the aid of (diacetoxyiodo)benzene (DIB) as the oxidant. Not only mild reaction conditions, but also excellent yields and good substrate scope make the present protocol potentially useful in organic synthesis.

A new mode of aromatic metamorphosis has been developed, which allows thiophenes and their benzo-fused derivatives to be converted a variety exotic heteroles. This transformation involves 1) the efficient generation key 1,4-dianions by means desulfurative dilithiation with lithium powder 2) subsequent trapping dianions heteroatom electrophiles in one-pot manner. Via dilithiation, sulfur atoms a...