ИСТИНА

The ligands based on ethanolamines widely used in organometallic and coordination chemistry. The tosylation reaction of ethanolamines results to semiproducts in synthesis of such ligands. The classical method of tosylation of monoethanolamines usually results in N,O-ditosylation. However, in some cases the alcohol tosylation gives the products with substitution of TsO group by nucleophiles present in reaction medium. In this study we have established that tosylation of monoethanolamines in a medium of pyridine under increased reaction time (compared to the classical method) leads to the unexpected formation of novel N-alkylpyridinium tosylates. The structure of the compounds obtained was established by multinuclear NMR spectroscopy and X-ray analysis (R = H).