Enantioselective Mannich Reactions with the Practical Proline Mimetic <i>N</i>-(<i>p</i>-Dodecylphenyl-sulfonyl)-2-pyrrolidinecarboxamide
作者:Hua Yang、Rich G. Carter
DOI:10.1021/jo8027938
日期:2009.3.6
highly enantioselective and diastereoselective protocol for performing Mannichreactions has been developed by using a p-dodecylphenylsulfonamide-based proline catalyst. This catalyst facilitates the use of common, nonpolar solvents and increased concentrations as compared to alternative methods. A series of syn-selective Mannichreactions is reported, including the rapid access of α- and β-amino acids surrogates
One-Pot Organocatalytic Direct Asymmetric Synthesis of γ-Amino Alcohol Derivatives
作者:Armando Córdova
DOI:10.1055/s-2003-41423
日期:——
This report describes the unprecedented use of unmodified aldehydes as donors in catalytic three component one-pot asymmetric Mannich reactions. The Mannich-type reactions were also readily performed for the first time with both in situ generated and preformed N-PMP protected aromatic aldimines. The proline-catalyzed reactions provided an efficient and very mild entry to either enantiomer of γ-amino alcohol derivatives in high yield and stereoselectivity.