Practical Highly Enantioselective Synthesis of Propargylamines through a Copper-Catalyzed One-Pot Three-Component Condensation Reaction
作者:Nina Gommermann、Paul Knochel
DOI:10.1002/chem.200501233
日期:2006.5.24
The one-potthree-componentreaction of terminal alkynes, aldehydes and secondary amines in the presence of copper(I) bromide/quinap is reported. The reaction scope has been determined and a broad variety of all three components has been used, which afforded the corresponding propargylamines in good to excellent yields and moderate to very good enantioselectivities. The reaction showed a strong positive
Practical highly enantioselective synthesis of terminal propargylamines. An expeditious synthesis of (S)-(+)-coniine
作者:Nina Gommermann、Paul Knochel
DOI:10.1039/b409951f
日期:——
The one-pot three-component addition reaction of trimethylsilylacetylene, aldehydes and dibenzylamine provides in the presence of CuBr/Quinap as catalyst, various enantiomerically enriched propargylamines in good yields (up to 99%) and excellent enantiomeric excess (up to 98%
ee) which can be used as a key intermediate in the synthesis of the alkaloid (S)-(+)-coniine.
Enantioselective Synthesis of Chiral α-Aminoalkyl-1,2,3-triazoles Using a Three-Component Reaction
作者:Paul Knochel、Nina Gommermann、Anna Gehrig
DOI:10.1055/s-2005-918931
日期:——
A range of chiral a-aminoalkyl-1,2,3-triazoles have been prepared in a modular fashion in 3 steps with up to 98% ee. The keystep is a CuBr/Quinap-catalyzed enantioselective asymmetric three-component synthesis of propargylamines.
Synthesis of Chiral α-Aminoalkylpyrimidines Using an Enantioselective Three-Component Reaction
作者:Paul Knochel、Henry Dube、Nina Gommermann
DOI:10.1055/s-2004-829129
日期:——
A range of chiral α-aminoalkylpyrimidines has been prepared in a modular fashion in 5 steps with up to 98% ee. The key step is a CuBr-catalyzed enantioselective asymmetric three-component synthesis of propargylic amines.