Chemoselective synthesis of ketones and ketimines by addition of organometallic reagents to secondary amides
作者:William S. Bechara、Guillaume Pelletier、André B. Charette
DOI:10.1038/nchem.1268
日期:2012.3
is of great importance, as this motif serves as a synthetic handle for the elaboration of numerous organic functionalities. In this context, we report a general and chemoselective method based on an activation/addition sequence on secondaryamides allowing the controlled isolation of structurally diverse ketones and ketimines. The generation of a highly electrophilic imidoyl triflate intermediate was
novel and atom-economic palladium-catalyzed isomerization-hydrocarbonylative cyclization reaction of 1,5-dienes to 2-alkylidenecyclopentanones has been developed, which provides a rapid and straightforward approach to 2-alkylidenecyclopentanones with high stereoselectivity. The reaction was found to proceed via alkene isomerization and selective hydrocarbonylative cyclization to generate 2-alkylidenecyclopentanones
作者:Alex C. Seastram、Mishra Deepak Hareram、Thomas M. B. Knight、Louis C. Morrill
DOI:10.1039/d2cc02958h
日期:——
An organic oxidant free electrochemical method for the azidocyanation of alkenes via 1,4-nitrile migration has been developed.
已经开发出一种无机氧化剂的有机电化学方法,通过1,4-腈迁移,对烯烃进行氮化氰化反应。
Pd-catalyzed domino carbonylative–decarboxylative allylation: an easy and selective monoallylation of ketones
作者:Steven Giboulot、Frédéric Liron、Guillaume Prestat、Benoit Wahl、Mathieu Sauthier、Yves Castanet、André Mortreux、Giovanni Poli
DOI:10.1039/c2cc32391e
日期:——
In the presence of an allyl alcohol, α-chloroacetophenones undergo an allyloxycarbonylation reaction followed by in situ decarboxylative allylation to selectively afford the corresponding monoallylated ketones via a Pd-catalyzed domino sequence. The scope of the reaction was extended to substituted α-chloroacetophenones as well as various allyl alcohols.
Enantioselective Reductive <i>N</i>-Cyclization–Alkylation Reaction of Alkene-Tethered Oxime Esters and Alkyl Iodides by Nickel Catalysis
作者:Xue-Gong Jia、Qi-Wei Yao、Xing-Zhong Shu
DOI:10.1021/jacs.2c05523
日期:2022.8.3
N-cyclization–alkylation reaction and thus showcase the potential of heterocyclization for accessing new enantioenriched cyclic architectures. This work establishes a newapproach for enantioselective aza-Heck cyclization/cross-coupling sequence, which remains a long-standing unsolved challenge for the synthetic community. The reaction proceeds with primary, secondary, and a few tertiary alkyl iodides, and