作者:E.E. Nifantiev、S.F. Sorokina、A.A. Borisenko、A.I. Zavalishina、L.A. Vorobjeva
DOI:10.1016/s0040-4020(01)98852-0
日期:1981.1
members of series when investigating the stereochemistry of heterocycles substituted at the phosphorus. The examination of 1H, 13C and 31P NMR spectra has shown that substitution of hydrogen at the phosphorus by axial halogen, alkyl, alkoxy and amido-groups is accompanied by shielding of 4,6-C atoms and deshielding of 4,6-axial protons; introduction of an axial Me group into γ-position to the P-H fragment
2-H-1,3,2-二恶英,二硫杂,二氮杂和氧杂氮杂膦酰基已通过还原相应的磷酰氯而制得。已经研究了这些化合物的光谱和化学性质。当研究在磷处取代的杂环的立体化学时,这些化合物被认为是系列的初始成员。对1 H,13 C和31 P NMR谱的研究表明,磷被轴向卤素,烷基,烷氧基和酰胺基取代时,会同时屏蔽4,6-C原子和对4,6进行脱屏蔽-轴向质子;将轴向Me基团引入PH片段的γ位会导致磷核共振发生30–40 ppm的高场偏移。