Shtamburg, V. G.Shishkin, O. V.Zubatyuk, R. I.Kravchenko, S. V.Tsygankov, A. V.Shtamburg, V. V.Distanov, V. B.Kostyanovsky, R. G.2018-07-052018-07-052007Synthesis, structure and properties of N-alkoxy-N-(1-pyridinium)urea salts, N-alkoxy-N-acyloxyureas and N,N-dialkoxyureas / V. G. Shtamburg [et al.] // Mendeleev Commun. – 2007. – Vol. 17, № 3. – P. 178-180.https://repository.kpi.kharkov.ua/handle/KhPI-Press/36971N-Alkoxy-N-(1-pyridinium)urea salts 3, 4 have been prepared, the conversions of N-acetoxy-N-methoxyurea 7 into N,N-dimethoxyurea 8 and of N-n-propyloxy-N-(1-pyridinium)-N',N'-dimethylurea chloride 6 into N,N dimethoxy-N',N'-dimethylurea 11 were carried out. A high pyramidality of the amide nitrogen in O–N–X groups [X = N+C5H5, OMe, OC(O)C6H4Cl-p] has been revealed by XRD studies of ureas 3b, 8 and N-p chlorobenzoyloxy-N-n-butyloxyurea 9.enArticle10.1016/j.mencom.2007.05.016