Enantioselective Mannich Reaction of β-Keto Esters with Aromatic and Aliphatic Imines Using a Cooperatively Assisted Bifunctional Catalyst
作者:Antti J. Neuvonen、Petri M. Pihko
DOI:10.1021/ol5025025
日期:2014.10.3
An efficient urea-enhanced thiourea catalyst enables the enantioselective Mannichreaction between β-keto esters and N-Boc-protected imines under mild conditions and minimal catalyst loading (1–3 mol %). Aliphatic and aromatic substituents are tolerated on both reaction partners, affording the products in good enantiomeric purity. The corresponding β-amino ketones can readily be accessed via decarboxylation