Polydentate Phosphane Ligands Featuring
<i>N</i>
,
<i>N</i>
,
<i>N’</i>
‐Trialkylformamidines
作者:Anatoliy Marchenko、Georgyi Koidan、Anastasiya Hurieva、Viktoriya V. Dyakonenko、Svitlana V. Shishkina、Eduard B. Rusanov、Andrii A. Kyrylchuk、Aleksandr Kostyuk
DOI:10.1002/ejic.202001059
日期:2021.3.12
A set of novel polydentate phosphanes featuring one, two and three formamidine substituents was prepared by the reaction of C‐trimethylsilyl N,N,N’‐trialkylformamidines with P(III) chlorides. Chloro‐ and dichlorophosphanes gave tertiary phosphanes. More sterically congested adamantyldichlorophosphane reacted only with the least sterically congested silylformamidine. With phosphorus trichloride, five‐membered
通过C-三甲基甲硅烷基N,N,N'-三烷基甲form与P(III)氯化物的反应制备了一组具有一个,两个和三个甲am取代基的新型多齿膦。氯和二氯膦生成叔膦。在空间上更拥挤的金刚烷基二氯膦仅与空间上最不拥挤的甲硅烷基甲am反应。在大多数情况下,与三氯化磷一起形成五元杂环,即1,4,2-二氮杂磷-4-氯化铵。提出了一种重氮二磷的形成机理,并通过DFT计算得到了证实。关键的氯膦经历了1,2-磷的转变,得到了相应的卡宾,该卡宾容易环化成二氮杂磷鎓盐。通过X射线衍射法研究了关键化合物。1,4,2-二氮杂磷-4-氯化铵的分子结构分析13 c和1H-1,4,2-二氮杂磷14 c揭示了正交取向的i-丙基氨基的N C环键异常短。仅在N,N-二甲基-N'-异丙基三甲基甲硅烷基甲am的情况下,我们设法分离出三膦,尽管收率很低。