A Three-Membered Cyclic Phosphasilene
A Three-Membered Cyclic Phosphasilene
复制标题
DOI：
10.1002/anie.201811944
复制
发表时间：
2019-02-11
影响因子：
16.6
通讯作者：
Scheschkewitz, David
中科院分区：
文献类型：
--
作者：
Heider, Yannic;Willmes, Philipp;Scheschkewitz, David
小的不饱和磷杂环由于其张力和双键和磷孤对的附加官能度而成为通用试剂。在这里，我们报告的合成和分离的最小可能的环状磷硅烯作为一个稳定的加合物与N-杂环卡宾（NHC）。第一反应性研究表明：a）PSi 2环是Fe（CO）（4）片段通过磷孤对电子的有效配体，和B）BPh 3对NHC的提取导致PSi 2单元的快速头对头或头对尾二聚化。相对容易的NHC断裂表明P=Si双键可用于进一步操作。
Small unsaturated phosphacycles are versatile reagents owing to their strain and the added functionality of the double bond and the phosphorus lone pair. Herein we report the synthesis and isolation of the smallest possible cyclic phosphasilene as a stable adduct with an N-heterocyclic carbene (NHC). First reactivity studies show a) that the PSi2 ring is a competent ligand to the Fe(CO)(4) fragment via the phosphorus lone pair and b) that the abstraction of the NHC by BPh3 results in the rapid head-to-head or head-to-tail dimerization of the PSi2 unit. The relatively facile NHC cleavage indicates that the P=Si double bond is available for further manipulation.