2

The novel methods of 6-R-3-(2-aminophenyl)-2Н-1,2,4-triazin-5-ones synthesis by 2-R-[(3H-quinazoline-4-yliden)hydrazono]--carboxylic acid esters hydrazinolysis and nucleophylic cleavage of 3-R-2H-[1,2,4]triazino[2,3-c]quinazoline-2-ones are worked out. It is shown that 2-R-[(3H-quinazoline-4-yliden)–hydrazono]--carboxylic acid esters under hydrazinolysis form (3Н-quinazoline-4-yliden)hydrazine or 6-R-3-(2-aminophenyl)-2Н-1,2,4-triazin-5-ones. The reaction direction depends on geometric isomerism of corresponding esters.

The determining factor of the reaction of 2,6-di-tert-butylphenol with alkaline metal hydroxides is temperature, depending on which two types of potassium or sodium 2,6-di-tert-butyl phenoxides are formed with different catalytic activity in alkylation of 2,6-di-tert-butylphenol with methyl acrylate. More active forms of 2,6-But2C6H3OK or 2,6-But2C6H3ONa are synthesized at temperatures higher than 433 K representing predominantly monomers of 2,6-di-tert-butylphenoxides which produce dimers when cooling.

 It has been established that cuprous catalytic reaction of (2E,6E)-2,6-dibenzylidenecyclohexanone or (2E,2'E)-3,3'-benzene-1,4-diyl-bis(1-phenylprop-2-en-1-one) with arenediazonium chloride and sulfur(IV) oxide leads to the formation of arylsulfonylation product by only one double bond. Substituted 2-benzyliden-6-[(arylsulfonyl)(phenyl)methyl]cyclohexanones and 3[4-(1-arylsulfonyl-3-oxo-3-phenylpropyl)phenyl]-1-phenylprop-2-en-1-ones) have been obtained

The effect of reagents molar ratio and temperature, the amount of toluene as solvent and pyrogallol as inhibitor on the yield of alkylcyclohexene acids has been established at their production via Diels-Alder reaction using 2,3-dimethylbuta-1,3-diene and alkylacrylic acids. The structure and physico-chemical characteristics of the synthesized compounds have been determined.

Based on the experimental studies and mathematical modeling method, we have chosen the optimal conditions of the 2,3-dimetylbuta-1,3-diene and 2-hydroxyethylmethacrylate cyclization reaction with obtaining of 2-hydroxyethyl 1,3,4-trimethylcyclohex-3-encarboxylate.

The determining factor of the reaction of 2,6-di-tert-butylphenol with alkaline metal hydroxides is temperature, depending on which two types of potassium or sodium 2,6-di-tert-butyl phenoxides are formed with different catalytic activity in the alkylation of 2,6-di-tert-butylphenol with methyl acrylate. More active forms of 2,6-But2C6H3OK or 2,6-But2C6H3ONa are synthesized at temperatures higher than 433 K and represent predominantly monomers of 2,6-di-tert-butyl phenoxides producing dimers on cooling.

Kinetic aspects of the reaction of 2-hydroxyethyl-1,3,4-trimethylcyclohex-3-ene-1-carboxylate obtaining have been investigated. On the basis of the obtained results the kinetics of the process has been studied by the Michaelis-Menten equation. The limiting stage of the reaction is established and its mechanism is suggested.