Shtamburg, V. G.Shishkin, O. V.Zubatyuk, R. I.Kravchenko, S. V.Tsygankov, A. V.Mazepa, A. V.Klots, E. A.Kostyanovsky, R. G.2018-07-052018-07-052006N-Chloro-N-alkoxyureas: synthesis, structure and properties / V. G. Shtamburg [et al.] // Mendeleev Commun. – 2006. – Vol. 16, № 6. – P. 323-325.https://repository.kpi.kharkov.ua/handle/KhPI-Press/36970The XRD studies of N-chloro-N-alkoxyureas 1, 2 have revealed the high pyramidality of the amide nitrogen in the O–N–Cl group caused by nO–s*N–Cl anomeric effect, the other sequence of this effect is anionic lability of the chlorine atom; nucleophilic substitution at the nitrogen depends on the N'-substitutent nature: chlorine atoms in ureas 1 and 5 are replaced by outer nucleophile whereas, under the same conditions, ureas 2–4 undergo cyclization into 1-alkoxybenzimidazolin-2-ones 10–12.enArticle10.1070/MC2006v016n06ABEH002382