S. V. Nikitin

Synthesis of methylene-bis(1-oxy-3,3-dialkyl-1-triazene 2-oxides) and their analogs

Synthetic procedures towards methylene-bis(1-oxy-3,3-dialkyl-1-triazene 2-oxides), the first representatives of a new class of promising exogenous nitric oxide (NO) donors, which can release NO in living organisms, were developed. Synthesis involves the reactions of salts of 1-hydroxy-3,3-dialkyl-1-triazene 2-oxides with either dibromomethane or 1-chloromethoxy-3,3-dialkyl-1-triazene 2-oxides.

Synthesis and properties of 2-hydroxyethyl derivatives of methylene-bis(1-oxy-3, 3-dialkyl-1-triazene 2-oxides)

Synthetic approach to 2-hydroxyethyl derivatives of methylene-bis(1-oxy-3, 3-dialkyl-1triazene 2-oxides), promising NO donors, which can release NO in living organisms was developed. Some transformations of the hydroxyethyl moiety of the synthesized compounds were studied.

Synthesis of 1-alkoxy-3-methyl-1-triazene 2-oxides and 3, 3´-methylene-bis(1-alkoxy-3-methyl-1-triazene 2-oxides)

A method for the synthesis of 1-alkoxy-3-methyl-1-triazene 2-oxides and their salts with alkali metals was developed. 3, 3´-Methylene-bis(1-alkoxy-3-methyl-1-triazene 2-oxides) were obtained for the first time. Some properties of the synthesized compounds were studied. These compounds can be of interest as new NO and HNO donors in living organisms.

Alkylation of 1-alkoxy-3-methyl-1-triazene 2-oxide sodium salts

Abstract1-Alkoxy-3-methyl-1-triazene 2-oxide sodium salts react with chloromethyl methyl sulfide to give a mixture of 1-alkoxy-3-methyl-3-(methylthiomethyl)-1-triazene 2-oxides and 3-alkoxy-1-methyl-3-(methylthiomethyl)-1-triazene 2-oxides. The reaction of these triazene oxide sodium salts with 3,3-dialkyl-1-chloromethoxy-1-triazene 2-oxides produces a complex mixture of product bearing the oxytriazene moieties of the starting alkoxy-1-triazene 2-oxides bonded with the methylene group as a key structural fragment.

Synthesis of 1,1’-[methylenebis(oxy)]-bis[3-alkyl-3-(2-hydroxyethyl)triaz-1-ene 2-oxides]

Potential NO donors, 1,1’-[methylenebis(oxy)]bis[3-(2-hydroxyethyl)triaz-1-ene 2-oxides], were derived from 3-alkyl-3-(2-acetoxyethyl)-1-chloromethoxytriaz-1-ene 2-oxides and 3-alkyl-1-hydroxy-3-(2-hydroxyethyl)triaz-1-ene 2-oxide sodium salts.

Synthesis of 3,3-bis(2-hydroxyethyl) and 3,3,3’-tris(2-hydroxyethyl) derivatives of 1,1’-[methylenebis(oxy)]bis(triaz-1-ene 2-oxides)

Synthetic procedures to access new potential NO donors that can generate NO in living systems, 3,3-bis(2-hydroxyethyl) and 3,3,3’-tris(2-hydroxyethyl) derivatives of 1,1’-[methylenebis(oxy)]bis(3,3-dialkyltriaz-1-ene 2-oxides), were elaborated. 3,3-Bis(2-acetoxyethyl)-1(chloromethoxy)triaz-1-ene 2-oxide reacts with 1-hydroxytriaz-1-ene 2-oxide sodium salts to give a series of alkylated 3,3-bis(2-acetoxyethyl) derivatives. Deacetylation of the latter produces 3-(2-hydroxyethyl)-11,11-dialkyl-6,8-dioxa-3,4,5,9,10,11-hexaazaundeca-4,9-dien-1-ol 4,10-dioxides and 11-alkyl-3-(2-hydroxyethyl)-6,8-dioxa-3,4,5,9,10,11-hexaazatrideca-4,9-diene-1,13-diol 4,10-dioxides.

Synthesis of 1-alkoxy-3-(2-hydroxyethyl)-1-triazene 2-oxides

Synthetic procedure to access the first representatives of a new series of 3-monosubstitued functional derivatives of 1-alkoxy-1-triazene 2-oxides, i.e., 1-alkoxy-3-(2-hydroxyethyl)- and 1-alkoxy-3-(2-acetoxyethyl)-1-triazene 2-oxides, were elaborated. 1-Alkoxy-3,3-bis(2-hydroxyethyl)-1-triazene 2-oxides were used to derive 3-(2-acetoxyethyl)-, 3-(2-bromoethyl)- and 3-(2-cyanoethyl)substituted 1-alkoxy-3-(2-acetoxyethyl)-1-triazene 2-oxides.

Reactions of chloromethoxy-substituted 3-(2-acetoxyethyl)-1-hydroxytriaz-1-ene 2-oxides with 1-alkoxy-3-(2-hydroxyethyl)triaz-1-ene 2-oxide alkali salts

Reactions of 1-alkoxy-3-(2-hydroxyethyl)triaz-1-ene 2-oxides and 1-chloromethoxytriaz1-ene 2-oxides with chloromethoxy derivatives of 3-alkyl-3-(2-acetoxyethyl)- and 3,3-bis(2-acetoxyethyl)-1-hydroxytriaz-1-ene 2-oxides result in very complex product mixtures with the major product comprising the starting salt fragments linked by a methylene bridge. In these products, the central methylene group bridges either two oxygen atoms or two nitrogen atoms, or one oxygen and one nitrogen atom. The synthesized compounds contain from two to four 2-hydroxyethyl moieties.

Synthesis of 1-[(nitroxyalkoxy)methoxy]-1-triazene 2-oxides, new hybrid nitrogen monoxide donors

Abstract1-[(Nitroxyalkoxy)methoxy]-3,3-dialkyl-1-triazene 2-oxides were obtained by the reaction of 3,3-dialkyl-1-hydroxy-1-triazene 2-oxide sodium salts with β- or γ-nitroxyalcohol chloromethyl ethers or by the reaction of 3,3-dialkyl-1-(bromoalkoxymethoxy)-1-triazene 2-oxides with silver nitrate. These compounds can be of interest as new hybrid NO donors in living organisms.

Optimization of the key steps of synthesis and study of the fundamental physicochemical properties of high energy compounds — 4-(2,2,2-trinitroethyl)-2,6,8,10,12-pentanitrohexaazaisowurtzitane and 4,10-bis(2,2,2-trinitroethyl)-2,6,8,12-tetranitrohexaazaisowurtzitane

The key steps of the synthesis of two high energy compounds, namely, 4-(2,2,2-trinitroethyl)-2,6,8,10,12-pentanitrohexaazaisowurtzitane and 4,10-bis(2,2,2-trinitroethyl)-2,6,8,12-tetranitrohexaazaisowurtzitane, were optimized. Their enthalpy of formation, density, impact and friction sensitivity, and thermal stability were experimentally determined.