Copper-catalyzed desymmetrization of oxabenzonorbornadienes with aluminum reagents
摘要:
The desymmetrization of oxabenzonorbornadienes with aluminum reagents and SimplePhos as chiral ligand is described. The corresponding homoallylic alcohols are obtained in high yield, diastereoselectivity, and enantiomeric excess. Furthermore the first anti enantioselective desymmetrization with aromatic nucleophiles is reported. (C) 2009 Elsevier Ltd. All rights reserved.
A highly enantioselective method for the copper-catalyzed desymmetrization of oxabenzonorbornadienes with aluminum reagents and SimplePhos as chiral ligand has been developed. The same reaction with Grignard reagents is also reported. A wide range of alkyl chains have been used with moderate to high enantioselectivity and high trans selectivity. The transfer of a methyl group is also reported with