Regio- and Diastereoselective Cu-Mediated Trifluoromethylation of Functionalized Alkenes
摘要:
alpha- and beta-substituted N,N-diethylacrylamides undergo copper-mediated direct beta-trifluoromethylation. The amide moiety acts as a directing group for the regio- and the stereo-controlled introduction of the trifluoromethyl group. The reaction is carried out under acidic conditions in the presence of Umemoto's reagent. This method does not require prefunctionalized substrates and delivers excellent stereoselectivity.
Organic Iodide Aided Carbonylation of Terminal Acetylenes with Palladium Catalyst
作者:Sigeru Torii、Hiroshi Okumoto、Masahiro Sadakane、Long He Xu
DOI:10.1246/cl.1991.1673
日期:1991.10
Carbonylation of various terminalacetylenes in the presence of a catalytic amount of organic iodides or amine•HI salt and palladium complexes was found to produce 2-substituted acrylamides in good yields under mild conditions (5 atm, 120 °C, 6 h).
Palladium-Catalyzed Hydroaminocarbonylation of Alkynes with Tertiary Amines via C–N Bond Cleavage
作者:Bao Gao、Hanmin Huang
DOI:10.1021/acs.orglett.7b03331
日期:2017.11.17
An efficient strategy for the cleavage of the C–N bond of tertiary amines was developed with DTBP as an oxidant, in which the cleaved H atom and amine moiety were successfully transferred to the desired products. This strategy has enabled an efficient palladium-catalyzed hydroaminocarbonylation of alkynes with tertiary amines. Notably, the catalyst loading could be lowered from 5 to 0.1 mol %, which