Vol 478, No 1 (2018)

A new strategy for the synthesis of monodisperse polyphenols chemically bound to a rigid thermally stable molecular platform has been suggested. The platform has been prepared by the Suzuki–Miyaura reaction of a tetraboryl porphyrin derivative and 3-(4′-bromophenyl)-4,6-dimethoxyindole. Subsequent reactions of complete demethylation of obtained tetraindole and partial blocking of the corresponding phenolic hydroxyls by acid-labile protective groups have led to the formation of a final modified polyphenol compound of the porphyrin series. On the basis of the this polyphenol, a positive photoresist for lithography with exposure radiation at a wavelength of 13.5 nm has been developed; the photoresist affords the fabrication of topological structures with 16-nm resolution.

An approach to the synthesis of adamantane derivatives with NO-generating fragment containing nitroxy group has been developed. 1-Aminoadamantane, memantine, and adamantanecarboxylic acid have been used as initial compounds. The prepared compounds have shown ability to generate nitric oxide in a system mimicking biological reactions of nitro group reduction.

The possibility of heterogenization of a polymer system by using new post-metallocene catalytic systems comprising phenoxy-imine titanium halide complexes with different ligand environments modified by oxyallyl groups was studied with the aim of decreasing sticking of the reactor powders of ultra-high-molecular-weight polyethylene (UHMWPE RPs) suitable for solid-phase processing. The effective use of selfimmobilizing systems for the manufacture of UHMWPE RPs with reduced sticking to the reactor walls and the stirrer, but with somewhat reduced strength of the UHMWPE RP-based articles is shown.