Reactions of Phosphine Oxides with Bromophosphoranimines; Synthesis and Unusual Rearrangements of O–Donor Stabilized Phosphoranimine Cations
作者:Martin Bendle、Keith Huynh、Mairi F. Haddow、Ian Manners
DOI:10.1021/ic201360p
日期:2011.10.17
Reaction of phosphine oxides R3P═O [R = Me (1a), Et (1c), iPr (1d) and Ph (1e)], with the bromophosphoranimines BrPR′R″P═NSiMe3 [R′ = R″ = Me (2a); R′ = Me, R″ = Ph (2b); R′ = R″ = OCH2CF3 (2c)] in the presence or absence of AgOTf (OTf = CF3SO3) resulted in a rearrangementreaction to give the salts [R3P═N═PR′R″O−SiMe3]X (X = Br or OTf) ([4]X). Reaction of phosphine oxide 1a with the phosphoranimine
膦氧化物的R反应3 P = O [R =我(1A),等(1C),我PR(1D)和pH(1E)],与bromophosphoranimines BrPR'R“P═NSiMe 3 [R'= R ''=我(2a); R'= Me,R''= Ph(2b);R'= R“= OCH 2 CF 3(图2c)]中的AgOTf存在或不存在(OTF = CF 3 SO 3)导致重排反应,得到盐[R 3 P═N═PR'R”O- -SiMe 3 ] X(X = Br或OTf)([ 4 ] X)。氧化膦1a的反应与phosphoranimine BrPMe 2 ═NSiPh 3(5)配有一个空间位阻的甲硅烷基也产生了类似的重排产物[我3 P═N═PMe 2 O形SIPH 3 ] X([ 8 ] X),但在慢显著速度。与此相反,直接反应的膨松叔丁基取代的氧化膦,吨卜3 P = O(1B)与图2a或图2c中的AgOTf
New Amphiphilic Poly[bis(2,2,2-trifluoroethoxy)phosphazene]/Poly(propylene glycol) Triblock Copolymers: Synthesis and Micellar Characteristics
作者:Harry R. Allcock、Song Yun Cho、Lee B. Steely
DOI:10.1021/ma061531w
日期:2006.11.1
Amphiphilic triblock copolymers were synthesized with two hydrophobic poly[bis(2,2,2-trifluoroethoxy)phosphazene] blocks linked to a central poly(propylene glycol) block. These were synthesized via the cationic polymerization of chlorophosphoranimines and coupling of these blocks to a diamine functionalized poly(propylene glycol) followed by macromolecular substitution. The micellar characteristics
Reactions of P-Donor Ligands with <i>N</i>-Silyl(halogeno)organophosphoranimines: Formation of Cations with P−P Coordination Bonds and Poly(alkyl/aryl)phosphazenes at Ambient Temperature
作者:Keith Huynh、Alan J. Lough、Ian Manners
DOI:10.1021/ja063979i
日期:2006.11.1
electronic push-pull mechanism. Employment of phosphites as the phosphorus donor results in the generation of high molecular weight poly(alkyl/aryl)phosphazenes at ambient temperature. This preparative route is potentially advantageous over the conventional thermal polycondensation route.
Telechelic Polyphosphazenes: Reaction of Living Poly(dichlorophosphazene) Chains with Alkoxy and Aryloxy Phosphoranimines
作者:Harry R. Allcock、Eric S. Powell、Andrew E. Maher、Robbyn L. Prange、Christine R. de Denus
DOI:10.1021/ma030554x
日期:2004.5.1
ditelechelic polyphosphazenesvia the living, cationicpolymerization of phosphoranimines has been developed. This process provides access to phosphazene block, comb, and graft copolymers that contain organic or organosilicon macromolecules. Several alkoxy and aryloxy phosphoranimines, RO(CF3CH2O)2PNSiMe3 (R = Ph, MeOPh, C10H7, BOC−NH−CH2CH2, t-BuMe2SiO(CH2)5, C8H11, and CH2CH−C6H4), were synthesized via the
已经开发了一种对方法的改进,该方法用于通过磷酸亚胺的活性阳离子聚合来合成定义明确的单-和双-telechelic聚磷腈。该方法提供了含有有机或有机硅大分子的磷腈嵌段,梳形和接枝共聚物的途径。几种烷氧基和芳氧基磷酰胺,RO(CF 3 CH 2 O)2 P NSiMe 3(R = Ph,MeOPh,C 10 H 7,BOC-NH-CH 2 CH 2,t- BuMe 2 SiO(CH 2)5, C 8 H 11和CH 2CH-C 6 H 4)是通过溴代磷酰胺胺与适当的醇钠或氧化芳基之间的反应合成的。这些物质是潜在的引发剂或终止剂,可用于合成具有醚键而不是先前使用的氨基键的远螯聚磷腈。通过终止活性聚(二氯磷腈)链[Cl 3 P N-(Cl 2 P N ),制备了双telechelic聚合物RO [(CF 3 CH 2 O)2 P N] n -P(OCH 2 CF 3)3 OR。)n -PCl 3 ]
Synthesis, Structures, and Stability of N-Donor-Stabilized N-Silylphosphoranimine Cations
作者:Keith Huynh、Eric Rivard、Alan J. Lough、Ian Manners
DOI:10.1002/chem.200601452
日期:2007.4.16
silver salts as halide abstractors. Reactions in the absence of silver salts yield the corresponding cations, with halide counterions. The stability of the salts is highly dependent on the phosphoranimine substituent and the nature of the counteranion, such that electron-withdrawing substituents and non-coordinating anions yield the most stable salts. X-ray structural determination of the cations reveal