Herein, we report the first example of group transfer radical addition of O-vinylhydroxylamine derivatives onto unactivatedalkenes. By utilizing O-vinylhydroxylamine derivatives as both the N- and C-donors, this reaction enables intermolecular carboamination of unactivatedalkenes in an atom economical fashion. As the process is initiated through N-radical addition followed by C-transfer, linear carboamination
在此,我们报告了第一个将 O-乙烯基羟胺衍生物基团转移自由基加成到未活化烯烃上的例子。通过使用 O-乙烯基羟胺衍生物作为 N 和 C 供体,该反应能够以原子经济的方式对未活化的烯烃进行分子间碳胺化。由于该过程是通过 N-自由基加成和 C-转移引发的,因此提供了线性碳胺化产物。这与烯烃的经典自由基碳官能化不同,后者通常有利于支链产物,因为它是由 C-自由基加成引发的。
Palladium-Catalyzed Inter- and Intramolecular Coupling Reactions of Aryl and Vinyl Halides Mediated by Indium
作者:Phil Ho Lee、Dong Seomoon、Kooyeon Lee
DOI:10.1021/ol047567v
日期:2005.1.1
Treatment of aryl and vinylhalides with 50 mol % of 100 mesh indium, 2.5 mol % of Pd-C, and 1.5 equiv of LiCl under mild conditions (DMF, 100 degrees C, 1-3 h) could produce coupling products efficiently in good to excellent yields in which the C(sp2)-C(sp2) bond was formed. This reagent worked equally well with both intermolecular and intramolecular coupling reactions, producing a variety of biaryls
Enantioselective hydroacylation of N-vinylindole-2-carboxaldehydes
作者:Avipsa Ghosh、Levi M. Stanley
DOI:10.1039/c4cc00210e
日期:——
We report rhodium-catalyzed hydroacylations of N-vinylindole-2-carboxaldehydes that form chiral, non-racemic 2,3-dihydro-1H-pyrrolo[1,2-a]indol-1-ones in high yields with excellent enantioselectivities.
accomplished with a chiral Lewis base and a chiral Brønsted acid as cocatalysts, generating various β-arylthio ketones bearing an all-carbon quaternary center in moderate to excellent yields and excellent enantioselectivities. These chiral arylthio ketone products are common intermediates with many applications, for example, in the design of new chiral catalysts/ligands and the totalsynthesis of natural products
O<sub>2</sub>-mediated C(sp<sup>2</sup>)–X bond oxygenation: autoxidative carbon–heteroatom bond formation using activated alkenes as a linkage
作者:Qingquan Lu、Jiyong Chen、Chao Liu、Zhiyuan Huang、Pan Peng、Huamin Wang、Aiwen Lei
DOI:10.1039/c4ra17106c
日期:——
Autoxidative carbon–heteroatombond formation using activated alkenes as a linkage is described. Heteroatom (O, S) nucleophiles could be transformed into different kinds of valuable β-keto compounds via an O2-mediated C(sp2)–X bond oxygenation process, without using any external organic oxidants or metal catalysts.