Synthesis of a crosslinked polymer with a benzyl(triphenyl)phosphonium ionic liquid moiety and its catalytic activity
作者:Xuezheng Liang
DOI:10.1039/c5ra18507f
日期:——
A novel crosslinked polymer with a benzyl(triphenyl)phosphonium ionic liquid moiety was synthesized from triphenylphosphine and p-xylylene dichloride. The bulky IL molecules were inlaid in the polymeric framework, which avoided pore blocking and IL moiety release. The polymer had a high BET surface area and accessible active sites. The polymer was applied to catalyze the aza-Michael additions and gave
Synthesis and catalytic activity of porous polymer containing ionic liquid structures
作者:Junqiao Li、Wei Lu、Weifeng Li、Xuezheng Liang
DOI:10.1134/s0023158416060082
日期:2016.11
A novel porous polymercontaining ionic liquid (IL) structures was synthesized via quternization and condensation of 4-vinylpyridine and p-xylylene dichloride. The ionic liquidstructures were incorporated in the polymeric framework and for this reason bulky IL molecules can hardly block pores and neutralize active sites. The polymer shows a high BET surface area and easily accessible active sites
Chemoselective Michael TypeAddition of Aliphatic Amines to α,β-Ethylenic CompoundsUsing Bismuth Triflate Catalyst
作者:Srinivas R. Adapa、Ravi Varala、M. Mujahid Alam
DOI:10.1055/s-2003-38345
日期:——
Catalytic amounts of bismuth triflate efficiently catalyse the conjugate addition of aliphatic amines to α,β-ethylenic compounds in acetonitrile under mild conditions. The reaction is chemoselective, as aromatic amines do not participate in the reaction. Further, the catalyst can be easily recovered and reused.
Transformations of N-ethylamines into amide derivatives under the action of sulfur monochloride
作者:L. S. Konstantinova、A. A. Berezin、O. A. Rakitin
DOI:10.1007/s11172-007-0179-9
日期:2007.6
Tertiary N-ethylamines were converted into amide derivatives by reactions with sulfurmonochloride and DABCO at 0 °C. Depending on the nature of the substituents in the amine, the reaction can be accompanied by unexpected transformations.
通过在 0 °C 下与一氯化硫和 DABCO 反应,将叔 N-乙胺转化为酰胺衍生物。根据胺中取代基的性质,该反应可能伴随着意想不到的转变。
Interception of Cobalt-Based Carbene Radicals with α-Aminoalkyl Radicals: A Tandem Reaction for the Construction of β-Ester-γ-amino Ketones
作者:Jie Zhang、Jiewen Jiang、Dongmei Xu、Qiang Luo、Hongxiang Wang、Jijun Chen、Huihuang Li、Yaxiong Wang、Xiaobing Wan
DOI:10.1002/anie.201408874
日期:2015.1.19
The interception of cobalt‐based carbeneradicals with α‐aminoalkyl radicals was combined with the Kornblum–DeLaMare reaction and provides β‐ester‐γ‐amino ketones, which are otherwise difficult to obtain in high chemoselectivity. Mechanistically, this transformation is an interplay of cobalt‐based carbeneradicals, organoradicals, and ionic intermediates and involves the construction of two CC bonds