Easily Separable Cyclic Oligosilanes with
<i>p</i>
‐Methoxyphenyl Groups and Their Stereoselective Functionalization
作者:Yamato Omatsu、Yoshiyuki Mizuhata、Norihiro Tokitoh
DOI:10.1002/ejic.202001076
日期:2021.3.12
five‐membered cyclic oligosilanes, from which each stereoisomer was separable and identified spectroscopically and structurally. Interestingly, the dearylative pentatriflation of the isolated cyclic pentasilanes yielded the sole pentatriflated cyclopentasilane from any stereoisomer. In addition, its further chlorination, bromination, and iodination quantitatively afforded the sole stereoisomer of the
合成了在每个硅环原子上具有三甲基甲硅烷基甲基和芳基的新型环状低硅烷。具有苯基作为芳基的二氯硅烷的还原缩合得到五元和六元环状低聚硅烷,它们是其立体异构体的混合物。另一方面,使用p甲氧基苯基取代苯基导致形成四元和五元环状低聚硅烷,从中可分离出每种立体异构体,并在光谱和结构上进行鉴定。有趣的是,分离出的环状五硅烷的脱芳基五次离心分离可从任何立体异构体产生唯一的五次离心分离的环戊硅烷。另外,其进一步的氯化,溴化和碘化定量地提供了相应的五卤代环戊硅烷的唯一立体异构体。