Search

An efficient procedure has been developed for the synthesis of N-substituted tetra(hexa)oxazaspiroalkanes by reaction of heptaoxadispiroalkanes and pentaoxaspiroalkanes with amino acids (glycine, alanine, leucine, valine, methionine) in the presence of samarium-containing catalysts.

An efficient method has been developed for the synthesis of di(tri)peroxysilacycloalkanes by cyclization of geminal bis-hydroperoxides and 1,1′-peroxybis(1-hydroperoxycycloalkanes) with bis(methoxymethyl)diphenylsilane in the presence of lanthanide catalysts. Conditions have been found for the reduction of diphenylhexaoxasiladispirocycloalkanes to diphenyltetraoxasiladispirocycloalkanes.

A promising method for the synthesis of a new class of macrocyclic phosphorus-containing tri- and diperoxides was developed. The method is based on catalytic ring transformation reactions of heptaoxadispiroalkanes, pentaoxacanes, and pentaoxadispiroalkanes with phenylphosphine followed by oxidation of the reaction mixture with H2O2.

An efficient method has been developed for the synthesis of N-aryl(alkyl)-N-(hexaoxazadispiroalkanyl)amines by the reaction of 3,6-di(spiroalkanyl)-substituted heptaoxacycloundecanes with hydrazine derivatives (3-chlorophenylhydrazine, phenylhydrazine, 2,4-dinitrophenylhydrazine, and tert-butylhydrazine) with Sm-containing catalysts. It was found that amines with macrocyclic spiro-linked azatriperoxide substituents exhibit a high cytotoxic activity against Jurkat, K562, and U937 tumor cell line and normal fibroblast cell line.