Abstract:
PURPOSE:To obtain the title compound excellent in water repellency and usable as an acid catalyst of easy catalyst separation giving high acid catalyst activity even in the presence of water by fluorination and sulfonation of polyphenylsiloxane. CONSTITUTION:The objective fluorine-contg. sulfonated polyphenylsiloxane catalyst made up of recurring unit of the formula [X is fluorine atom or (ether oxygen atom-contg.) 2-14C fluorine-contg. alkyl; n is integer: 1-5; m is integer: 1-3] can be obtained by fluorination and sulfonation of polyphenylsiloxane. Alternatively, the objective compound can be obtained either by sulfonation of a fluorine-contg. polyphenylsiloxane using a sulfonating agent or by fluorination of a sulfonic acid-introduced polyphenylsiloxane using a fluorine- contg. compound.
Abstract:
PURPOSE:To obtain the title compound useful as an intermediate for synthesizing pyrrolnitrin, antimicrobial agent in high yield by oxidizing a substituted aniline as a starting raw material, reacting the resultant compound with a specific compound, successively hydrolyzing and carrying out the decarboxylation reaction. CONSTITUTION:A substituted aniline shown by formula I (X is halogen) such as 2,6-dichloroaniline is treated with NaNO2, etc., in the presence of an inorganic acid into a diazonium salt, which is reacted with NaNO2, etc., in the presence of a copper compound and oxidized to give a compound shown by formula II. This compound is reacted with a compound such as methyl cyanoacetate shown by formula III (R and R are cyano or esterified carboxyl group) in the presence of a base to give a compound shown by formula IV. Then this compound is hydrolyzed in the presence of an acid or a base to give a compound shown by formula V or a salt thereof, which is further decarboxylated in a solvent such as dimethylformamide under heating to give the aimed compound shown by formula VI such as 3-chloro-2-nitroroluene.
Abstract:
PROBLEM TO BE SOLVED: To provide a method for producing an anthranilic acid derivative advantageously utilizable as a raw material for producing a quinazolin-4-one derivative. SOLUTION: The method for producing a 5-alkoxy-4-halogenoalkoxyanthranilic acid includes reducing a 5-alkoxy-4-halogenoalkoxy-2-nitrobenzoic acid derivative. Otherwise, a 4-alkoxy-5-halogenoalkoxy-2-nitrobenzoic acid derivative is reduced to produce a 4-alkoxy-5-halogenoalkoxyanthranilic acid. The 5-alkoxy-4-halogenoalkoxy-2-nitrobenzoic acid derivative is obtained by reacting a 3-alkoxy-4-hydroxybenzoic acid derivative with a dihalogenoalkane, followed by a reaction with nitric acid in the presence of an alkali metal nitrite. The 4-alkoxy-5-halogenoalkoxy-2-nitrobenzoic acid derivative is obtained by reacting a 4-alkoxy-3-hydroxybenzoic acid derivative with the dihalogenoalkane, followed by the reaction with the nitric acid in the presence of the alkali metal nitrite. COPYRIGHT: (C)2010,JPO&INPIT