Organocatalytic asymmetric synthesis of (−)-δ-coniceine based on sequential proline-catalyzed asymmetric α-amination–HWE olefination
摘要:
An efficient asymmetric synthesis of (-)-delta-coniceine via sequential proline-catalyzed asymmetric alpha-amination and Horner-Wadsworth-Emmons olefination of an aldehyde with excellent enantiomeric excess (>99%) and high yields (overall yield 44%) is described. (C) 2010 Elsevier Ltd. All rights reserved.
Organocatalytic asymmetric synthesis of (−)-δ-coniceine based on sequential proline-catalyzed asymmetric α-amination–HWE olefination
摘要:
An efficient asymmetric synthesis of (-)-delta-coniceine via sequential proline-catalyzed asymmetric alpha-amination and Horner-Wadsworth-Emmons olefination of an aldehyde with excellent enantiomeric excess (>99%) and high yields (overall yield 44%) is described. (C) 2010 Elsevier Ltd. All rights reserved.