摘要 在叔丁基氢过氧化物(T-HYDRO)/ t - BuOK体系存在下,环状N-芳基叔胺与硝基甲烷反应生成β-硝基胺,收率高达90%。当使用TMSCN代替硝基甲烷时,以高达96%的产率获得α-氨基腈。该方法适用于几种未活化的环状芳基胺底物。考虑到通过初始电子转移过程形成相应的亚胺离子中间体,这些转化是合理的。 在叔丁基氢过氧化物(T-HYDRO)/ t - BuOK体系存在下,环状N-芳基叔胺与硝基甲烷反应生成β-硝基胺,收率高达90%。当使用TMSCN代替硝基甲烷时,以高达96%的产率获得α-氨基腈。该方法适用于几种未活化的环状芳基胺底物。考虑到通过初始电子转移过程形成相应的亚胺离子中间体,这些转化是合理的。
The construction of the pyrrolidine ring about a nitrogen of a primary amine by a reductive condensation reaction using 2,5-dimethoxytetrahydrofuran and sodium borohydride in acidic water medium is described. The reaction is fast, affords good to excellent yields and appears insensitive to electron effects and severe steric hindrance; it is found to be compatible with a large variety of aryl substituents, including nitro and oxo groups. The reaction allows the introduction of two deuterium atoms, with label conservation, in both the α-positions of the pyrrolidine ring by the use of sodium borodeuteride instead of sodium borohydride.
Transition Metal‐Free Synthesis of
<i>meta</i>
‐Bromo‐ and
<i>meta</i>
‐Trifluoromethylanilines from Cyclopentanones by a Cascade Reaction
作者:Markus Staudt、Adnan Cetin、Lennart Bunch
DOI:10.1002/chem.202102998
日期:2022.2.19
in biologically active compounds and often obtained from transition metal-catalyzed coupling of an aryl halide with an amine. In this work, we report a transition metal-free method for the synthesis of meta-bromo- and meta-trifluoromethylanilines startingfrom 3-tribromomethylcyclopentanone or 3-(2-bromo-2-chloro-1,1,1-trifluoroethyl)cyclopentanone, respectively. The scope of the transformation is shown
The present invention relates to new compounds of general formula (I), wherein the groups R
1
to R
3
, X
1
, X
2
, X
3
and L
1
are defined as in claim
1
, which are suitable for the treatment of diseases characterised by excessive or abnormal cell proliferation, and the use thereof in such a treatment.