Facile Synthesis of Novel Functionalized Silsesquioxane Nanostructures Containing an Encapsulated Fluoride Anion
摘要:
The presence of strongly electron withdrawing groups on alkoxysilanes, EWG-(CH2)(n)-Si(OEt)(3) (where n = 1-3 and the electron-withdrawing group EWG contains an Si-C(sp(3)) bond), facilitates the formation and encapsulation of the fluoride anion in a silsesquioxane cage. Such species have been studied by F-19 and Si-29 NMR spectroscopy and X-ray crystallography together with MALDI-TOP and ESI mass spectrometry, The EWG must not be a good leaving group. Interestingly, this strategy led only to the T-8 cage and excellent yields were obtained (81-95%) even without solvent. A wide range of functionalities were used. This new route offers an opportunity to build novel nanometer-sized 3-D molecular structures with a variety of functionalities which have not been accessible in the past.
DOI:
10.1021/om300277g
作为产物:
描述:
三乙氧基硅烷 、 丙烯酸甲酯(MA) 在
N-heterocyclic carbene fuctionalized with methyl(trimethylsilane) and methoxypolyethylene glycol Pt(II) complex 作用下,
反应 10.0h,
以94.3%的产率得到2-(carbomethoxy)ethyltriethoxysilane
参考文献:
名称:
聚醚链和甲硅烷基官能化的 N-杂环卡宾铂配合物:合成和作为氢化硅烷化催化剂的应用
摘要:
图形摘要 摘要描述了用聚醚链和甲硅烷基官能化的新型 N-杂环卡宾铂 (II) 配合物的合成和表征。此外,还报道了它们在不饱和碳-碳键(包括烯烃、炔烃、乙烯基醚和不饱和酯)的催化氢化硅烷化中的应用。这些新的配合物表现出优异的催化活性和氢化硅烷化选择性。催化系统可循环使用 >27 次。