Cu(OTf)2/trisoxazoline catalyzed asymmetric Friedel–Crafts reaction of pyrroles with alkylidene malonates
摘要:
In the presence of catalytic amount of Cu(OTf2/trisoxazoline, an enantioselective Friedel-Crafts reaction of N-methyl pyrrole with alkylidene malonates has been developed and LIP to 66% ee is achieved. (C) 2008 Elsevier Ltd. All rights reserved.
Tris(oxazoline)/copper-catalyzed coupling of alkynes with nitrones: a highly enantioselective access to β-lactams
摘要:
Chiral tris(oxazoline)/Cu(I) complexes are demonstrated as a type of efficient catalysts for the asymmetric Kinugasa reaction of terminal alkynes with C-arylnitrones, providing a highly enantio- and diastereoselective access to optically active beta-lactams. (C) 2012 Elsevier Ltd. All rights reserved.