Micelle-Enabled Palladium Catalysis for Convenient sp<sup>2</sup>-sp<sup>3</sup> Coupling of Nitroalkanes with Aryl Bromides in Water Under Mild Conditions
作者:Jeremy Brals、Justin D. Smith、Faisal Ibrahim、Fabrice Gallou、Sachin Handa
DOI:10.1021/acscatal.7b02663
日期:2017.10.6
demonstrated with the palladium-catalyzed sp2-sp3 coupling of nitroalkanes to aryl bromides using a heteroleptic palladium catalyst under unprecedentedly mild conditions. Optimized reaction conditions mostly provided good yields up to gram scale, with high selectivity and functional group tolerance for a wide scope of aryl bromides. Use of surfactant FI-750-M makes water the gross reaction medium and enables
A general protocol for the Pd-catalyzed-arylation of nitroalkanes is described. Substituted aryl bromides as well as aryl chlorides can be coupled efficiently with a variety of nitroalkanes under mild conditions to selectively yield the monoarylated products. This method tolerates a number of functional groups including ketones, esters, and olefins. Notably, the arylation of nitroalkanes can be effected chemoselectively over ketone and ester arylation.
Trifluoromethylation of Secondary Nitroalkanes
作者:Amber A. S. Gietter-Burch、Vijayarajan Devannah、Donald A. Watson
DOI:10.1021/acs.orglett.7b01196
日期:2017.6.2
Using a commercially available Umemoto’s reagent, the metal-free trifluoromethylation of nitroalkanes is now possible. This method provides a general, high-yielding synthesis of α-(trifluoromethyl)nitroalkanes. The quaternary α-(trifluoromethyl)nitroalkanes obtained from this transformation can be elaborated to a variety of complex nitrogen-containing molecules, including α-(trifluoromethyl)amines
Copper‐Catalyzed α‐Arylation of Nitroalkanes with (Hetero)aryl Bromides/Iodides
作者:Jianqiang Huang、Taian Li、Xiaobiao Lu、Dawei Ma
DOI:10.1002/anie.202315994
日期:2024.2.12
(hetero)aryl/alkenyl halides (Br, I) is described here. The method relies on using some newly developed oxalamide ligands, and gives coupling products in great diversity. Since the coupling products can be conveniently transformed into the corresponding α-(hetero)aryl amines, ketones, carboxylic acids and aldehydes, our method provides a highly competitive approach for preparing these compounds from readily