Furan synthesis through AuCl3-catalysed cycloisomerisation of β-alkynyl β-ketoesters
摘要:
AuCl3 efficiently catalyses the cycloisomerisation of readily available beta-alkynyl beta-ketoesters to generate trisubstituted furans. The substrate scope is wide and the reaction is high yielding and operationally simple. (C) 2011 Elsevier Ltd. All rights reserved.
Enantioselective Construction of Chiral Bispiro[Oxindole-Pyrrolidine-Pyrazolone] Derivatives via Sequential and One-Pot Mannich/Hydroamination Reaction
drug discovery was developed by using a chiral amine-squaramide Mannichreaction and Au(I)-catalyzed hydroamination. The developed synthetic strategy performed either stepwise or as a one-pot process allows the formation of chiral bispirocyclic [oxindole-pyrrolidine-pyrazolones] in high yields (up to 75%) with excellent enantioselectivities (up to 99%).