An efficient and inexpensive catalyst system for the aza-Michael reactions of enones with carbamatesElectronic supplementary information (ESI) available: experimental. See http://www.rsc.org/suppdata/cc/b3/b307733k/
Highly Efficient Aza-Michael Reactions of Enones with Carbamates Using a Combination of Quaternary Ammonium Salts and BF<sub>3</sub>·OEt<sub>2</sub>as a Catalyst
作者:Chun-Gu Xia、Li-Wen Xu、Lyi Li、Shao-Lin Zhou、Jing-Wei Li、Xiao-Xue Hu
DOI:10.1055/s-2003-43333
日期:——
Aza-Michael reactions of enones with carbamates took efficiently in the presence of a catalytic amount of quaternary ammonium salts and BF 3 .OEt 2 to afford the total products in high yields. The new catalytic system was also efficient in the aza-Michael reaction of chalcone, which was difficult to react with carbamates by transition metal salts catalysts.
An efficient and inexpensive catalyst system for the aza-Michael reactions of enones with carbamatesElectronic supplementary information (ESI) available: experimental. See http://www.rsc.org/suppdata/cc/b3/b307733k/
作者:Li-Wen Xu、Chun-Gu Xia、Xiao-Xue Hu
DOI:10.1039/b307733k
日期:——
A new strategy which uses very cheap FeCl3 as an effective catalyst in the presence of Me3SiCl has been developed for the conjugate addition of enones and chalcone with unactivated weakly nucleophilic carbamates.
A combination of gold chloride organometallic complex and a silver salt was used to catalyze intermolecular hydroamination of activated alkenes, i.e aza-Michael reactions. The gold-catalyzed reactions of activated alkenes with nitrogen substrates were investigated and found to afford various mono- and dihydroamination products, the latter being rare and original. After flash chromatography, gold NHC
TMAF-Catalyzed Conjugate Addition of Oxazolidinone and Thiols
作者:Vincent Dalla、Mickaël Ménand
DOI:10.1055/s-2004-836057
日期:——
TMAF (Me4NF) is a useful catalyst for the conjugate addition of oxazolidinone and thiols to a range of Michael acceptors including esters, ketones, nitroolefins and cinnamaldehyde.