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.
N,N-DIBENZYL-N-[1-CYCLOHEXYL-3-(TRIMETHYLSILYL)-2-PROPYNYL]-AMINE FROM CYCLOHEXANECARBALDEHYDE, TRIMETHYLSILYLACETYLENE AND DIBENZYLAMINE
作者:Gommermann, Nina、Knochel, Paul、Rech, Jason C.、Ellman, Jonathan A.
DOI:10.15227/orgsyn.084.0001
日期:——
Preparation of functionalized primary chiral amines and amides via an enantioselective three-component synthesis of propargylamines
作者:Nina Gommermann、Paul Knochel
DOI:10.1016/j.tet.2005.08.064
日期:2005.11
functionalized primary chiral amines and amides from propargylamines has been developed. The chirality is established by an enantioselectivethree-component reaction of an aldehyde, a terminal alkyne and a secondary amine in the presence of copper(I) bromide/Quinap as the catalytic system leading to chiral propargylamines in high yields and enantioselectivities. Functionalization and reduction leads to various
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.