Reaction of Enaminones with Benzyltrimethylammmonium Dichloroiodate.
作者:Kiezo MATSUO、Shigetoshi ISHIDA、Yoshiro TAKUNO
DOI:10.1248/cpb.42.1149
日期:——
Reaction of enaminones with benzyltrimethylammonium dichloroiodate (BTMA·ICl2) in methylene chloride-methanol in the presence of sodium bicarbonate at room temperature gave iodinated products at the α-position of the carbonyl group in good yields within 1 h.
Monobromomalononitrile: an efficient regioselective mono brominating agent towards active methylene compounds and enamines under mild conditions
作者:Sudipta Pathak、Ashis Kundu、Animesh Pramanik
DOI:10.1039/c3ra46687f
日期:——
The potential of monobromomalononitrile (MBM) as a convenient source of cationic bromine in organic bromination reaction has been explored. Studies reveal that MBM can be a good substitute for N-bromosuccinimide (NBS) in various respects. Enamines and active methylene compounds bearing aromatic rings are selectively mono brominated on the vinylic and active methylene group respectively on reaction
Mild and Efficient Method for Synthesis of Eaminones Using Ytterbium Triflate as Catalyst
作者:Rener Chen、Ping Li、Jianjun Li、Weike Su
DOI:10.1080/00397911.2010.493722
日期:2010.8.5
A mild and efficient procedure for synthesis of β-enaminones by the condensation of β-dicarbonyl compounds and amines using ytterbium triflate [Yb(OTf)3] as catalyst is described. The catalyst can be easily recovered and reused without loss of activity.