Heterocyclic derivatives of long-chain diacetylenic acids

Article abstract of DOI:10.1007/BF00707229

Acyl derivatives of 2-aminopyridine, 2-aminopyrimidine, 4-amino-2,2,6,6-tetramethylpiperidine-1-oxyl, and 4-hydroxy-2,2,6,6-tetramethylpiperidine-1-oxyl were obtained form long-chain diacetylenic acyl chlorides and the corresponding heterocyclic compounds.Spreading isotherms of monolayers on a water surface show that lengthening of the hydrocarbon chain and replacement of the pyridyl groups in these compounds by the more hydrophilic pyrimidyl groups render the films more condensed.Long-chain acyl derivatives of nitroxyl radicals form monolayers possesing a low collapse pressure.ESR spectra on Langmuir-Blodgett films of these radicals before and after photopolymerization were recorded. - Keywords: long-chain diacetylenic acids, N-pyridyl and N-pyrimidylamides of alkanediynic acids, long-chain derivatives of nitroxyl radicals, synthesis, monolayers, Langmuir-Blodgett films