Cascade enantioselective synthesis of γ-aryl-γ-butyrolactones with a delayed stereoselective step
摘要:
Enantioselective synthesis of gamma-aryl-gamma-butyrolactones is achieved using (S)-1-phenylethylamine as a chiral auxiliary. The synthesis involves cascade formation-destruction-formation of the chiral centre with a delayed stereoselective step. The actual stereoselective step has been found to be intramolecular nucleophilic attack on a diastereotopic carbocation formed, thereby resulting in the formation of non-racemic gamma-aryl-gamma-butyrolactones. (C) 2008 Elsevier Ltd. All rights reserved.
Cascade enantioselective synthesis of γ-aryl-γ-butyrolactones with a delayed stereoselective step
摘要:
Enantioselective synthesis of gamma-aryl-gamma-butyrolactones is achieved using (S)-1-phenylethylamine as a chiral auxiliary. The synthesis involves cascade formation-destruction-formation of the chiral centre with a delayed stereoselective step. The actual stereoselective step has been found to be intramolecular nucleophilic attack on a diastereotopic carbocation formed, thereby resulting in the formation of non-racemic gamma-aryl-gamma-butyrolactones. (C) 2008 Elsevier Ltd. All rights reserved.
Cascade enantioselective synthesis of γ-aryl-γ-butyrolactones with a delayed stereoselective step
作者:Anil V. Karnik、Suchitra S. Kamath
DOI:10.1016/j.tet.2008.01.077
日期:2008.3
Enantioselective synthesis of gamma-aryl-gamma-butyrolactones is achieved using (S)-1-phenylethylamine as a chiral auxiliary. The synthesis involves cascade formation-destruction-formation of the chiral centre with a delayed stereoselective step. The actual stereoselective step has been found to be intramolecular nucleophilic attack on a diastereotopic carbocation formed, thereby resulting in the formation of non-racemic gamma-aryl-gamma-butyrolactones. (C) 2008 Elsevier Ltd. All rights reserved.