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6-Hydroxy-2-methyl(aryl)-1,3-benzoxazoles were synthesized by bromination of N-acetyl(aroyl)-1,4-benzoquinone monoimines. [ABSTRACT FROM AUTHOR]

On the interaction of 1-methyl-3-phenylbenzothieno[2,3- c]pyrilium perchlorate with primary and secondary amines and alkalis in aqueous media a product of cyclocondensation of 2-acetyl-3-phenacyl-benzo[ b]thiophene – 2-[2-(1-benzoyl-4-methyldibenzothienyl-2)benzo[ b]thienyl-3]phenyl-1-ethanone – was isolated in addition to the classical objects of recyclization. [ABSTRACT FROM AUTHOR]

The direction of the reaction of 4-bromo-1,3-diphenyl-2-buten-1-one (γ-bromodypnone) with hydrazines depends on the nature of the substituent they contain. Reaction with 1-methylhydrazinium hydrosulfate gives 1-methyl-3,5-diphenylpyridazin-1-ium bromide but carboxylic acid hydrazides give N-(2,4-diphenyl-1H-pyrrol-1-yl)carboxylic acid amides. γ-Bromodypnone and phenylhydrazine give both 1,3,5-triphenyl-1,4-dihydropyridazine and N,2,4-triphenyl-1H-pyrrol-1-amine (15%). 1-(2,4-Dinitrophenyl)hydrazine gives the 2,4-dinitrophenylhydrazone of (Z)-4-bromo-1,3-diphenyl-2-buten-1-one. Condensation of 2,4-diphenyl-1H-pyrrol-1-amine with aromatic aldehydes readily leads to N-(arylmethylidene)-2,4-diphenyl-1H-pyrrol-1-amines and alkylation with methyl iodide gives N,N-dimethyl-2,4-diphenyl-1H-pyrrol-1-amine. [ABSTRACT FROM AUTHOR]

Chlorination of N-aroyl(arylsulfonyl)-2,6-di- tert-butyl-1,4-benzoquinone imines gave Z and E isomers of 4-arylsulfonylimino-2,6-di- tert-butyl-5,6-dichlorocyclohex-2-en-1-ones and Z isomers of 4-aroyl-(arylsulfonyl)imino-2,6-di- tert-butyl-5,5,6-trichlorocyclohex-2-en-1-ones, in which the tert-butyl group on the sp 3-hybridized carbon atom occupies exclusively the axial position. The formation of Z/ E-isomeric structures is related to configurational stability of the chlorination products. The chlorination of 4-aroylamino-2,6-di- tertbutylphenols was found to be accompanied by replacement of one tert-butyl group by chlorine atom with formation of 4-aroylimino-6- tert-butyl-2,3,5,6-tetrachlorocyclohex-2-en-1-ones. [ABSTRACT FROM AUTHOR]

A method has been developed for the reaction of 2-cyanomethylbenzoic acid with N-methylanthranilic acid to give 2-[(1-methyl-4-oxo-1,4-dihydro-2-quinazolin-2-yl)methyl]benzoic acid, its esters were synthesized. The spectroscopic chracteristics of the isomeric compounds have been studied and compared in solution and in the solid state. [ABSTRACT FROM AUTHOR]