Abstract:
2-NITROBENZALDEHYDE, A VALUABLE CHEMICAL INTERMEDIATE, IS PREPARED THROUGH THE OXIDATION OF AN ALKALI METAL SALT OF 2-NITROPHENYLPYRUVIC ACID WITH POTASSIUM PERMANGANATE IN AN ALKALINE MEDIUM. Advantageously the requisite starting material is prepared directly by the reaction of 2-nitrotoluene and a diester of oxalic acid in the presence of an alcoholate and is then subjected to the oxidation without isolation. In a preferred embodiment the oxidation reaction mixture is acidified to convert the manganese-(IV) oxide to soluble maganese-(II) salts with concurrent conversion of oxalic acid to carbon dioxide. The process is industrially attractive in terms of the high yield, the availability of starting material and the ease of the manipulative steps involved.
Abstract:
Biphenyl or nucleus-substituted biphenyl can be prepared from benzene or nucleus-substituted benzene and oxygen or oxygen-containing gas in one step according to an equation ##SPC1##Wherein X is H, lower alkyl having 1 to 6 carbon atoms Cl, NO.sub.2, or lower alkoxy having 1 - 3 carbon atoms and Y is H or CH.sub.3, with excellent yield by heating the reactants in the presence, as a catalyst, of palladium or a palladium compound and sulfuric acid or sulfuric acid and a lower saturated fatty acid added to the reaction system and further in the presence or in the absence of an alkali metal salt.
Abstract:
A METHOD OF MAKING TRIFUOROMETHYLNITROPHENOLS, CHLORONITROPHENOLS ARE RELATED COMPOUNDS WHICH CONSISTS OF REACTING CERTAIN HALONITROBENZOTRIFLUORIDES WITH AT LEAST AN EQUIMO;AR AMOUNT OF AN ALKALI METAL OR ALKALINE EARTH METAL THIOCYANATE, SUFLHYDRATE, OR HYDROXIDE AND CARRYING OUT THE REACTION IN THE PRESENCE OF A SOLVENT MEDIUM SUCH AS DIMETHYLSUFHYLSULFOXIDE, DIMETHYLFORMAMIDE OR DIMETHYLACETAMIDE.
Abstract:
USEFUL ORGANIC COMPOUNDS ARE PRODUCED BY CONTACTING AN ETHYLENICALLY UNSATURATED ORGANIC COMPOUND WITH AN ORGANOMETALLIC COMPOUND OF A GROUP VIII METAL HAVING AN ATOMIC NUMBER IN THE RANGE OF 44-78 IN THE PRESENCE OR ABSENCE OF A CUPRIC SALT, AND THE ORGANIC COMPOUNDS PRODUCED ARE CONDENSATION PRODUCTS OF TE ORGANO GROUP WITH THE UNSATURATED ORGANIC COMPOUND.
Abstract:
2-NITROCHLOROBENZENES ARE PREPARED BY REACTING CERTAIN 4-SUBSTITUTED 2-NITROPHENOLS WITH PHOSGENE IN AN INERT SOLVENT IN THE PRESENCE OF A CATALYTIC AMOUNT OF A DIALKYLFORMAMIDE, THUS REPLACING THE HYDROXY GROUP WITH CHLORINE.
Abstract:
METHYL GROUPS ORTHO TO A STRONGLY ELECTRONEGATIVE GROUP ON AN AROMATIC RING ARE REMOVED BY REACTING THE SUBSTITUTED AROMATIC COMPOUND WITH A STRONG BASE DISSOLVED IN A SECONDARY OR TERTIARY ALCOHOL IN THE PRESENCE OF OXYGEN.
Abstract:
Halogenonaphthalenes are produced by contacting a naphthalene sulphonyl halide with a sulphuryl halide and a free radical source e.g. a peroxide or hydroperoxide. The process is stated to be less effective for producing fluoro- and iodothan for chloro- and bromo-naphthalenes. More than one sulphonyl halide group may be attached to the naphthalene nucleus which may also contain other substituents. Specific products mentioned are 1-chloro- and 2-bromo-naphthalenes, 1,5- and 2,7-dichloro- and dibromo-naphthalenes; 1,5-dichloro-3-nitro-naphthalene; 2,7-dichloro-1-methylnaphthalene; 1,5,7-trichloronaphthalene.