Constrained-Geometry Bisphosphazides Derived from 1,8-Diazidonaphthalene: Synthesis, Spectroscopic Characteristics, Structural Features, and Theoretical Investigations
作者:Julius F. Kögel、Nuri C. Abacılar、Felicia Weber、Benjamin Oelkers、Klaus Harms、Borislav Kovačević、Jörg Sundermeyer
DOI:10.1002/chem.201304498
日期:2014.5.12
Attempts to protonate the obtained bisphosphazides and to prove the computationally predicted pKBH+ values through NMR titration reactions resulted in their decay, which again was rationalized by theoretical calculations. Altogether we present the so far most extensive spectroscopic, structural and theoretical investigation of constrained geometry bisphosphazides and their Brønsted and Lewis basic properties
对1,8-二叠氮萘与磷(III)结构单元之间的Staudinger反应进行的研究是合成超碱性双磷腈质子海绵的关键步骤,得到了一组具有受限几何1,8-二取代萘骨架的双磷叠氮化物。该化合物类别不仅因为其出乎意料的高稳定性而引起了我们的兴趣,而且还特别是由于其在理论上预测的双磷腈类似物范围内的碱性,可以将其称为两个高度碱性氮原子的受限几何相互作用。11个带有简单P-氨基以及P-胍基取代基,氮杂磷杂环戊烷部分,P 2结构单元或衍生自L的手性P-氨基取代基的新双磷叠氮化物出现脯氨酸。对它们的光谱性质以及部分发色和结构特征进行了研究。在吡咯烷基取代的TPPN(2N 2)(TPPN = 1,8-双(三spyrrolidinophosphazenyl)萘)的情况下,从理论上和实验上逐步研究了氮的去除,这导致了TPPN(1N 2)的分离和结构表征)在一个分子中带有磷叠氮化物和磷腈官能团。尝试质子化获得的双磷叠氮化物并证明计算预测的p