Practical general procedures of N-acylation of 1-aminoalkanephosphonic acids, including N-acetylation, N-benzoylation and N-pivaloylation of the representative aminophosphonic acids are described. Physico-chemical properties of synthesized derivatives are presented. Dissociation equilibria, determined for some representative 1-(N-acylamino) alkanephosphonic acids, are listed.
The reaction of 2-(chloroseleno)benzoyl chloride with pyridine and pyridine-like heterocycles such as pyrimidine, pyrazine, quinoline, phthalazine, phenazine and 1,10-phenanthroline was studied. In the most cases stable 2-(hydroxyseleno)benzoylazinium chlorides were produced depending on the number of the pyridinium-like nitrogen atoms and their situation in the ring system.
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