Phosphorus–nitrogen compounds. Part VI. Aminolysis of octachlorocyclotetraphosphazatetraene and the crystal structure of 2-trans-6-bis(n-propylamino)-2,4,4,6,8,8-hexakis-tert-butylaminocyclo-2λ5, 4λ5, 6λ5, 8λ5-tetraphosphazatetraene

The reactions of hexachlorocyclotriphosphazatriene with pyridine derivatives

“…In the IR spectra of 6-10, the characteristic ν P N vibrations occur between 1194 and 1226 cm −1 . These data are in accordance with the reported values for phosphazene derivatives [21][22][23]. The indication of the partially substitutions for compounds 6-10 is given by the ν P Cl stretching bands observed at 592, 588, 592, 583, and 556 cm −1 , respectively.…”

Synthesis of a New Class of Fused Cyclotetraphosphazene Ring Systems

“…Intramolecular nucleophilic reactions of 2,6-diamino-substituted and 2,4,6,8-tetra-amino-substituted cyclotetraphosphazenes gave only the 2,6-bridged bicyclic phosphazenes. − The 2,4-bridged bicyclic phosphazenes have not previously been observed. However, compounds 2a – d having a secondary amine group can give either a 2,4-bridged or the 2,6-bridged compound in an intramolecular deprotonation reaction (Scheme ).…”

“…On the basis of our previous studies on deprotonation reactions of cyclotriphosphazenes, − the formation of three possible isomers (spiro bridged; 2,4-ansa bridged; 2,6-ansa bridged) are also expected for the tetrameric analogues (Scheme S1). On the other hand, it has been demonstrated previously that the deprotonation of secondary amine derivatives of cyclotetraphosphazenes leads to intramolecular displacement of a chloride and formation of 2,6 bridged bicyclic compounds. − In this case, deprotonation reaction of cyclotetraphosphazenes containing exosecondary amino group such as 2a – d can follow inter or intramolecular reaction pathways so the question remains how did compounds 3a – c occur?…”

Phosphorus–nitrogen compounds: Part 31. Syntheses, structural and stereogenic properties, in vitro cytotoxic and antimicrobial activities, and DNA interactions of bicyclotetraphosphazenes containing bulky side group

“…The Fourier transform infrared (FTIR) spectra were recorded on a Jasco FT/IR-430 spectrometer in KBr discs and reported in cm -1 units. One-dimensional (1D) 1 H, 13 C and 31 P NMR and two-dimensional (2D) heteronuclear single quantum coherence (HSQC), and heteronuclear multiple-bond correlation (HMBC) spectra were recorded on a Bruker DPX FT-NMR (500 MHz) spectrometer (SiMe 4 as internal and 85% H 3 PO 4 as external standards). The spectrometer was equipped with a 5mm PABBO BB inverse gradient probe.…”

“…Up to now, two kinds of 2,6-bicyclo tetraphosphazene derivatives were obtained from the reactions of N 4 P 4 Cl 8 with mono-functional amines (Fig. 1a) [13] and multi-functional reagents (Fig. 1b) [8].…”