Revisiting the 7-Phospanorbornene Family: New P-Alkyl Derivatives
作者:Tamara Kovács、Laura Sz. Fülöp、Zoltán Mucsi、Konstantin Karaghiosoff、Mátyás Czugler、György Keglevich
DOI:10.1002/hc.21265
日期:2015.9
converted to the corresponding phosphole oxides that, by the Diels–Alder reaction with N-maleimide derivatives or with another unit of phosphole oxide, yielded trapped phosphole oxides or phosphole oxide dimers, respectively, as new 7-phosphanorbornene 7-oxides. The stereostructures of three derivatives were evaluated by single crystal X-ray analysis. The regio- and stereospecific dimerization was studied
一系列 1-烷基-3-甲基-2,5-二氢-1H-磷氧化物被转化为相应的磷氧化物,通过与 N-马来酰亚胺衍生物或另一个磷氧化物单元的 Diels-Alder 反应,得到分别捕获磷氧化物或磷氧化物二聚体,作为新的 7-磷酰冰片烯 7-氧化物。通过单晶 X 射线分析评估了三种衍生物的立体结构。通过B3LYP/6-31G(d,p)量子化学计算研究了区域和立体定向二聚化,其结果与合成一致。探索了新的机械特征。单晶X射线分析得到的几何数据验证了量子化学计算的结果,偏差小于3%。
Fragmentation-Related Phosphonylation of Nucleophiles Utilizing P-Alkyl 2,3-oxaphosphabicyclo[2.2.2]octene 3-oxide Precursors
New P-alkyl 2,3-oxaphosphabicyclo-[2.2.2]octene 3-oxides were synthesized by the Bayer–Villiger oxidation of the corresponding 7-phosphanorbornene 7-oxides and were used as precursors for reactive alkylmetaphosphonates useful in the phosphonylation of alcohols. This is the first case that the reactivity of the two regioisomers formed by O-insertion was differentiated and that the fragmentation-related
A study on the ability of 2,5-dihydro- and 2,3,4,5-tetrahydro-1h-phosphole oxides, as well as 7-phosphanorbornene 7-oxide derivatives to undergo uv light-mediated fragmentation-related phosphinylation of methanol
P-heterocycles (1-14) in the photoinduced fragmentation-relatedphosphinylation of methanol was found to be influenced by the extent of ring strain and the UV absorption at 254 nm. The 7-phosphanorborneneoxides (7-14) are universal precursors due to their ring strain, no matter if they are UV-active or not at 254 nm. The easily available 2,5-dihydro-1H-phosphole oxides can be applied only in case of 1-phenyl