Synthesis of model organosiloxanes containing perfluoroether side-chains
作者:James A. S. Smith、Brian J. Brisdon、Stuart A. Brewer、Colin R. Willis
DOI:10.1039/b001376p
日期:——
A series of organotrisiloxanes [(Me3SiO)2MeSi(CH2)nO(CH2)mRf], (n = 3, m = 1, Rf = CF3; n = 3, m = 2, Rf = C4F9, C6F13, C8F17, C10F21, C7F15; n = 5, m = 1, Rf = CF3; n = 10, m = 0, Rf = C3HF6; n = 10, m = 1, Rf = CF3) have been prepared by the [Pt(cyclooctadiene)Cl2] catalysed hydrosilylation reaction between heptamethyltrisiloxane and CH2CH(CH2)n−2O(CH2)mRf. Yields are dependent upon the alkene chain length and degree of branching of the Rf group. Isomeric products [(Me3SiO)2MeSi(CH2)3OCH2CF3] and [(Me3SiO)2MeSiCH(Me)CH2OCH2CF3] were detected in reactions involving CH2CHCH2OCH2CF3 only.
A study on selective transformation of norbornadiene into fluorinated cyclopentane-fused isoxazolines
作者:Zsanett Benke、Attila M Remete、Loránd Kiss
DOI:10.3762/bjoc.17.132
日期:——
formed cycloalkene-fused isoxazoline scaffolds and selective CM by chemodifferentiation of the olefin bonds of the resulting alkenylated derivatives. Various experimental conditions were applied for the CM transformations with the goal of exploring substrate and steric effects, catalyst influence and chemodifferentiation of the olefin bonds furnishing the corresponding functionalized, fluorine-containing
这项工作通过氧化腈 1,3-偶极环加成/开环复分解 (ROM)/交叉复分解 (CM) 协议对降冰片二烯的选择性功能化进行了检查。市售降冰片二烯的功能化提供了具有多个立体中心的新型双环支架。合成涉及选择性环加成,随后形成的环烯烃稠合异恶唑啉支架的 ROM 和通过所得烯基化衍生物的烯烃键的化学分化选择性 CM。CM 转化应用了各种实验条件,目的是探索底物和空间效应、催化剂影响和烯烃键的化学分化,提供相应的官能化含氟异恶唑啉衍生物。
Fluorinated polyhedral oligomeric silsesquioxanes
作者:Xiaobai Wang、Qun Ye、Jing Song、Ching Mui Cho、Chaobin He、Jianwei Xu
DOI:10.1039/c4ra15108a
日期:——
A series of fluorinatedpolyhedraloligomericsilsesquioxane (POSS) derivatives were prepared via hydrosilylation reaction and they were characterized by 1H, 13C, 29Si and 19F nuclear magnetic resonance (NMR) spectroscopy and elemental analysis. The thermal stability of POSS derivatives was studied using thermogravimetric analysis (TGA) and they exhibited high decomposition temperatures ranging from