Nickel-Catalyzed <i>C</i>-Alkylation of Nitroalkanes with Unactivated Alkyl Iodides
作者:Sina Rezazadeh、Vijayarajan Devannah、Donald A. Watson
DOI:10.1021/jacs.7b04312
日期:2017.6.21
Enabled by nickel catalysis, a mild and general catalytic method for C-alkylation of nitroalkanes with unactivatedalkyliodides is described. Compatible with primary, secondary, and tertiary alkyliodides; and tolerant of a wide range of functional groups, this method allows rapid access to diverse nitroalkanes.
General Route for Preparing β-Nitrocarbonyl Compounds Using Copper Thermal Redox Catalysis
作者:Amber A. S. Gietter、Peter G. Gildner、Andrew P. Cinderella、Donald A. Watson
DOI:10.1021/ol5014153
日期:2014.6.6
Using a simple copper catalyst, the alkylation of nitroalkanes with α-bromocarbonyls is now possible. This method provides a general, functional group tolerant route to β-nitrocarbonyl compounds, including nitro amides, esters, ketones, and aldehydes. The highly sterically dense, functional group rich products from these reactions can be readily elaborated into a range of complex nitrogen-containing
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
The First Conversion of Primary Alkyl Halides to Nitroalkanes under Aqueous Medium
作者:Roberto Ballini、Luciano Barboni、Guido Giarlo
DOI:10.1021/jo049048b
日期:2004.10.1
obtained in aqueous medium by reaction of the corresponding halo derivatives with silver nitrite. The procedure works well with both alkyl bomide and alkyliodide and proceeds in satisfactory to good yields even in the presence of other functionalities, minimizing the formation of the undesired alkylnitrites.
Cascade Formation of Isoxazoles: Facile Base-Mediated Rearrangement of Substituted Oxetanes
作者:Johannes A. Burkhard、Boris H. Tchitchanov、Erick M. Carreira
DOI:10.1002/anie.201100260
日期:2011.5.27
Give me five! Nitro compounds and oxetan‐3‐one react through an intriguing cascade sequence to give isoxazole‐4‐carbaldehydes using inexpensive reagents in a one‐pot procedure (see scheme; Ms=methanesulfonyl). A variety of 3‐substitutedisoxazole‐4‐carbaldehydes were obtained in high overall yields.
击个掌!硝基化合物和oxetan-3-one通过一个有趣的级联序列反应,使用便宜的试剂在单锅法中制得异恶唑4-甲醛(见方案; Ms =甲磺酰基)。以高总收率获得了各种3-取代的异恶唑-4-甲醛。