Bridged cyclophosphazenes resulting from deprotonation reactions of cyclotriphophazenes bearing a P–NH group
作者:Serap Beşli、Simon J. Coles、David B. Davies、Adem Kılıç、Robert A. Shaw
DOI:10.1039/c1dt10073d
日期:——
products. Reaction of sodium hydride with mono-spiro cyclophosphazene derivatives having a P–NH group, N3P3Cl4[O(CH2)3NH], (1a) or N3P3Cl4[CH3N(CH2)3NH], (1b) leads to formation of bis-cyclophosphazenes bridged with an eight-membered cyclophosphazene ring in an ansa arrangement (2a, 2b) whereas reaction of sodium hydride with mono-amino cyclophosphazene derivatives [N3P3Cl5(NHR), R = n-hexyl, 3a; i-Pr
环三磷腈侧链中含有P–NHR基团的衍生物在强碱的存在下反应,形成稳定的分子间桥连产物。的反应氢化钠带有P-NH基,N 3 P 3 Cl 4 [O(CH 2)3 NH],(1a)或N 3 P 3 Cl 4 [CH 3 N(CH 2)3 NH]的单螺环磷腈衍生物,(1b)导致形成与八元环磷腈环桥联的双环磷腈(ansa)(2a,2b),而氢化钠具有单氨基环磷腈衍生物[N 3 P 3 Cl 5(NHR),R =正己基,3a;i -Pr,3b ; Ph,3c ]给出双螺旋环与四元环磷腈环以螺环排列方式桥接(4a–c)。在后面的反应中,由于水解反应与溶剂四氢呋喃中的水分有关,还获得了P-O-P桥接化合物(5a-c)。另外,发现环三磷腈与单螺化合物(1a)或(1b)在存在下氢化钠导致形成不对称桥联环磷腈(6a–b)的第一个实例。
Phosphorus-nitrogen compounds. Part 44. The syntheses of N,N-spiro bridged cyclotriphosphazene derivatives with (4-fluorobenzyl) pendant arms: Structural and stereogenic properties, DNA interactions, antimicrobial and cytotoxic activities
(2d, 2e, 2h and 2i). The structures of 2a and 2f are determined by X-ray crystallography. The stereogenic properties of 2a and 2f having four potential stereogenic P–centers are investigated by crystallography. The monospiro (2b–2e) and dispiro (2f–2i) products have one and two equivalent chiral centers, respectively. The dispiro derivatives may have two meso (trans-trans and cis-cis) and two racemate