herein shows that sulfonate/halide exchange can be advantageously performed in THF to avoid several side reactions such as elimination and epimerization when the reaction is performed from a chiral alkyl sulfonate or a substrate having a CH acidic chiral center. The main limitation of this procedure was found to be the conversion of secondaryalkyl sulfonates to alkyl chlorides. In this case, the
LEWIS ACID CATALYZED HALOGENATION OF ACTIVATED CARBON ATOMS
申请人:Zhang Yanhua
公开号:US20080275253A1
公开(公告)日:2008-11-06
A practical and efficient method for halogenation of activated carbon atoms using readily available N-haloimides and a Lewis acid catalyst has been disclosed. This methodology is applicable to a range of compounds and any halogen atom can be directly introduced to the substrate. The mild reaction conditions, easy workup procedure and simple operation make this method valuable from both an environmental and preparative point of view.
作者:V. V. Smirnov、V. M. Zelikman、I. P. Beletskaya、E. N. Golubeva、D. S. Tsvetkov、M. M. Levitskii、M. A. Kazankova
DOI:10.1023/a:1020889209717
日期:——
Quantitative catalytic bromination of alkanes, cycloalkanes, and arylalkanes with carbon tetrabromide as brominating agent was accomplished for the, first time.
POLYMERS FUNCTIONALIZED WITH ACTIVATED NITROGEN HETEROCYCLES CONTAINING A PENDANT FUNCTIONAL GROUP
申请人:BRIDGESTONE CORPORATION
公开号:US20160289355A1
公开(公告)日:2016-10-06
A method for preparing a functionalized polymer, the method comprising the steps of (i) preparing a halocarbon-activated nitrogen heterocycle containing a functional group, (ii) preparing a reactive polymer, and (iii) reacting the reactive polymer with the halocarbon-activated nitrogen heterocycle containing a functional group.