A. P. Yuvchenko

Synthesis of 1,3- and 1,4-bis-methoxy- and ethoxy-4-(m-carborane-C-methanoyloxy)phenylmethylene- and phenylmethyl]phenylenediamines

Abstract1,3- and 1,4-bis[3-methoxy and ethoxy-4-(m-carborane-C-methanoyloxy)phenylmethylene]phenylenediamines were synthesized from the vanillin and vanillal m-carborane-C-carboxylates by the reaction with 1,3- and 1,4-phenylenediamines in anhydrous methanol. Reduction of the title compounds with Na[BH(OAc)3] in benzene yielded 1,3- and 1,4-bis[3-methoxy- and ethoxy-4-(m-carborane-C-methanoyloxy)phenylmethyl] phenylenediamines.

Thermal Stability of Peroxyalkynes

The thermal stability of mono- and disubstituted peroxyalkynes was compared. The reaction order and the apparent activation energy for the first step of decomposition of the peroxides were determined. The strength of the O-O bond in 3-tert-alkyl(cycloalkyl, aralkyl)peroxy-3-methyl-1-butynes and 2-tert-alkylperoxy-2-methyl-2-alkynes was estimated.

Peroxide-containing Lithium Tetraalkoxyborates

Reactions of aliphatic and alicyclic ketones with lithium tert-alkylperoxyacetylides gave lithium peroxy alcoholates. Their reactions with trialkyl borates yielded peroxide-containing lithium tetraalkoxyborates.

Thermal Stability of Mono- and Polycyclic Peroxyalcohols and Their Derivatives by Thermal Analysis

A comparative study of the thermal stability of 33 mono- and polycyclic peroxyalcohols, as well as ethers and esters derived from them was performed by thermal analysis. Reaction orders and apparent rate constants of the first stage of peroxide decomposition were determined from the DTA curves. Semiempirical quantum-chemical calculations of the strength of the O-O bond in peroxycycloalkanols and peroxyalcohols of the adamantane series and their derived esters were performed.