Benzylation of Nitroalkanes Using Copper-Catalyzed Thermal Redox Catalysis: Toward the Facile C-Alkylation of Nitroalkanes
作者:Peter G. Gildner、Amber A. S. Gietter、Di Cui、Donald A. Watson
DOI:10.1021/ja304561c
日期:2012.6.20
The C-alkylation of nitroalkanes under mild conditions has been a significant challenge in organic synthesis for more than a century. Herein we report a simple Cu(I) catalyst, generated in situ, that is highly effective for C-benzylation of nitroalkanes using abundant benzyl bromides and related heteroaromatic compounds. This process, which we believe proceeds via a thermal redox mechanism, allows
Palladium-Catalyzed α-Allylation of Secondary Nitroalkanes with Allylic Alcohols and Strategic Exploitation of Seebach’s Reagent for the Total Synthesis of (±)-Adalinine
作者:Chieh-Yu Chang、Yen-Ku Wu
DOI:10.1021/acs.joc.8b00710
日期:2018.6.1
method is reported for the catalytic direct coupling of allylic alcohols and nitroalkanes. In the allylation process, the synergistic action of palladium complexes and titanium(IV) alkoxide facilitates the formation of nitronate and π-allylpalladium intermediate. In the cases of reluctant allylations, typically with sterically demanding nitroalkanes, we found the addition of substoichiometric amount
Sequential Acylation/Silylation/Hetero‐Claisen Rearrangement of Nitroalkanes for the Synthesis of Protected Hydroxyoxime Derivatives
作者:Yulia A. Antonova、Sema L. Ioffe、Alexey Yu. Sukhorukov、Andrey A. Tabolin
DOI:10.1002/ejoc.202100469
日期:2021.6.14
One-pot acylation-silylation sequence was developed for the synthesis of protected hydroxyoximes from aliphatic nitro compounds. Procedure is characterized by wide substrate scope for nitro compounds, acylating and silylating agents.
Tandem double acylation/[3,3]-rearrangement of aliphatic nitro compounds: a route to α-oxygenated oxime derivatives
作者:Yulia A. Antonova、Yulia V. Nelyubina、Alexey Yu. Sukhorukov、Sema L. Ioffe、Andrey A. Tabolin
DOI:10.1039/c9ob01005j
日期:——
A new tandem double acylation/rearrangement reaction of nitro compounds is described. It has a broad substrate scope allowing the mild and efficient synthesis of α-acyloxy oxime esters in high yields and regioselectivity. According to the obtained data, the mechanism for transformation was proposed. The utility of the obtained α-hydroxy oxime esters was demonstrated.
Photoredox-Nickel Dual-Catalyzed <i>C</i>-Alkylation of Secondary Nitroalkanes: Access to Sterically Hindered α-Tertiary Amines
作者:Sina Rezazadeh、Maxwell I. Martin、Raphael S. Kim、Glenn P. A. Yap、Joel Rosenthal、Donald A. Watson
DOI:10.1021/jacs.2c13174
日期:2023.3.1
The preparation of tertiary nitroalkanes via the nickel-catalyzed alkylation of secondary nitroalkanes using aliphatic iodides is reported. Previously, catalytic access to this important class of nitroalkanes via alkylation has not been possible due to the inability of catalysts to overcome the steric demands of the products. However, we have now found that the use of a nickel catalyst in combination