N-Substitution dependent stereoselectivity switch in palladium catalyzed hydroalkynylation of ynamides: a regio and stereoselective synthesis of ynenamides
作者:Vikas Dwivedi、Madala Hari Babu、Ruchir Kant、Maddi Sridhar Reddy
DOI:10.1039/c5cc06251a
日期:——
A palladium catalysed regioselective hydroalkynylation of ynamides for ynenamides is achieved with an N-substitution dependent stereoselectivity switch.
Zinc-Catalyzed Alkyne–Carbonyl Metathesis of Ynamides with Isatins: Stereoselective Access to Fully Substituted Alkenes
作者:Chaoqun Ao、Xiaohan Yang、Shikun Jia、Xinfang Xu、Yanqiu Yuan、Dan Zhang、Wenhao Hu
DOI:10.1021/acs.joc.9b02350
日期:2019.12.6
A zinc-catalyzed intermolecular alkyne-carbonyl metathesis reaction of ynamides with isatins followed by an amide to ester conversion has been developed, which produces the indolone derivatives with a fully substituted alkene species in good to high yields. The salient features of this reaction include the following: mild reaction conditions, an inexpensive zinc catalyst, a broad substrate scope, the
A facile route to obtain ynamides in high yields was described. The products were achieved through the iron-catalyzed C-N coupling reaction of amides with alkynyl bromides in the presence of 20 mol % of N,N'-dimethylethane-1,2-diamine (DMEDA).