Abstract: The present invention relates to a method of cleaving arylethers such as arylethers represented by the formula: ##STR1## wherein R is hydrogen, C.sub.1 -C.sub.6 alkyl, cycloalkyl, phenyl, substituted phenyl or CH.dbd.CH.sub.2 ; each A is independently NO.sub.2, hydroxy, halo, or methoxy; n is an integer from 0 to 5; and x is 1 or 2, comprising contacting the arylether with an amide hydrohalide salt under conditions sufficient to cleave the ether group(s) of the arylether and form a phenol or substituted phenol. The present invention also relates to a method of preparing 4,6-diaminoresorcinol, which is a monomer used for making polybenzoxazoles (PBO).

Abstract: A method of producing 4,6-diaminoresorcinol comprisinga) reducing a dinitroarylether of the formula: ##STR1## wherein R is hydrogen, C.sub.1 -C.sub.6 alkyl, cycloalkyl or CH.dbd.CH.sub.2, R' is hydrogen or CH.sub.2 --R, each A is independently Cl, Br, or I, and n is 0, 1 or 2; to form a diaminoarylether, andb) cleaving the ether group(s) from the diaminoarylether under conditions such that 4,6-diaminoresorcinol is formed as a salt or other stabilized form thereof.

Abstract: The present invention relates to a method of preparing 4,6-diaminoresorcinol from 1,2-dichloro-3,5-dinitrobenzene comprising the steps of:(a) contacting 1,2-dichloro-3,5-dinitrobenzene with a hydroperoxide in the presence of anhydrous base to form 2,3-dichloro-4,6-dinitrophenol;(b) contacting 2,3-dichloro-4,6-dinitrophenol with a hydroxy-containing compound to form 2-chloro-4,6-dinitroresorcinol; and(c) converting 2-chloro-4,6-dinitroresorcinol to 4,6-diaminoresorcinol, which is isolated as a salt or other stabilized form thereof,

Abstract: 2-Alkylpyrimidines are obtained in a one step reaction which comprises the dehydrogenation of a 2-alkyltetrahydropyrimidine over a supported noble metal catalyst under conditions which do not generate water and in which no water is added.

Abstract: A process for making mono- and dichlorinated or brominated aldehydes from aldehydes having at least 3 carbon atoms and hydrogens alpha to the carbonyl group or primary alcohols having at least 3 carbon atoms and hydrogens in the 2-position by direct bromination or chlorination by carrying out the bromination or chlorination in an inert organic solvent with bromine or chlorine and containing a catalyst complex of HX and an N,N-dialkyl or cycloalkylformamide where X is a counterion.

Abstract: 2-t-Butyl-5-chloropyrimidine is made by the direct chlorination of 2-t-butylpyrimidine with elemental chlorine in an acetic or propionic acid solution at temperatures of 40.degree. to 90.degree. C. in the presence of a buffer.

Abstract: A continuous process for preparing 5-oxo-2,4-dichloro-4-alkyl or aryl pentanenitriles, e.g., 5-oxo-2,4-dichloro-4-methylpentanenitrile-1 by reacting an .alpha.,.alpha.-dichloroaldehyde with an acrylonitrile in a coil reactor.

Abstract: Monomeric and polymeric triarylsulfonium complex salts which may be prepared by contacting diarylsulfoxides or polymeric arylsulfoxides with aromatic compounds in the presence of an organosulfonic acid are described. An example is tris-(4-phenoxyphenyl)sulfonium methane sulfonate prepared by reaction of bis-(4-phenoxyphenyl)sulfoxide, diphenyl ether and methane sulfonic acid. The compounds demonstrate useful corrosion inhibiting properties.

Abstract: Monomeric and polymeric triarylsulfonium complex salts which may be prepared by contacting diarylsulfoxides or polymeric arylsulfoxides with aromatic compounds in the presence of an organosulfonic acid are described. An example is tris-(4-phenoxyphenyl)sulfonium methane sulfonate prepared by reaction of bis-(4-phenoxyphenyl)sulfoxide, diphenyl ether and methane sulfonic acid. The compounds demonstrate useful corrosion inhibiting properties.

Abstract: Substituted pyridines are prepared by the base and transition metal catalyzed ring closure of substituted 5-oxo-pentane-1-nitriles.

Abstract: Suitably substituted 2-aminomethyl pyridines and suitably substituted 2-pyridinylcarbinols are reacted with 3-(2,2-dichloroethenyl)-2,2-dimethylcyclopropane carboxoyl chloride in an inert solvent to form a group of biologically active organic compounds. These compounds are active as fungicides, herbicides, or both.

Abstract: The hydrolysis of 2-t-butyl-5-halopyrimidines is carried out in the presence of an alkali metal methoxide and a catalytic amount of an N-oxide, a disulfide or elemental sulfur to prepare 2-t-butyl-5-hydroxypyrimidine in good yields and purity.

Abstract: A 3-aminopropyl carboxylic acid amide is dehydrogenated and cyclized over a supported platinum or palladium catalyst to prepare 2-alkylpyrimidines in a single step vapor phase reaction.