Asymmetric Coupling of Carbon‐Centered Radicals Adjacent to Nitrogen: Copper‐Catalyzed Cyanation and Etherification of Enamides
作者:Guoyu Zhang、Song Zhou、Liang Fu、Pinhong Chen、Yibiao Li、Jianping Zou、Guosheng Liu
DOI:10.1002/anie.202008338
日期:2020.11.9
The first copper‐catalyzed asymmetric cyanation and etherification reactions of enamides have been established, where a carbon‐centered radical adjacent to a nitrogen atom (CRAN) is enantioselectively trapped by a chiral copper(II) species. Moreover, the asymmetric cyanation of vinyl esters was disclosed as well. These reactions feature very mild reaction conditions and high functional group tolerance
is driven by a novel activation strategy and features a unique Pd(I)-Pd(I) mechanism, involving an iodide-assisted binuclear step to release the product. This method enables β-selective hydroformylation of a large range of alkenes and alkynes, including sensitive starting materials. Its utility is demonstrated in the synthesis of antiobesity drug Rimonabant and anti-HIV agent PNU-32945. In a broader
A mild, general and efficient hydrocyanation and hydroarylation of enamines catalyzed by Co(salen) complexes are described. Both reactions include regioselective C-H bond formation of enamines, and the corresponding products are obtained in high yield. Hydroarylation critically discriminates the benzyl and benzoyl aromatic rings on nitrogen in cyclization step, and the corresponding isoindolinones
Compounds of the formula (I), in which the substituents are as defined in claim
1
, are suitable for use as nematicides.
式(I)的化合物,其中取代基如权利要求书中定义的那样,适用于作为线虫杀虫剂的用途。
Copper-mediated synthesis of N-vinyl ynamides from N-vinyl carbamates
作者:Vincent Le Fouler、Guillaume Duret、Philippe Bisseret、Nicolas Blanchard
DOI:10.1016/j.tetlet.2018.07.053
日期:2018.9
Ynamides are versatile 3-atoms building blocks for organic synthesis as they participate in a variety of ionic, radical and pericyclic processes. Converting ynamides into 5-atom building blocks, such as the yet unreported N-vinyl ynamides, would open new avenues in this fascinating chemistry. We describe herein our efforts towards such goal and demonstrate that the cross-coupling between N-vinyl carbamates