823191-93-1Relevant academic research and scientific papers
Evaluation of sparteine-like chiral diamines in the enantioselective lithiation-electrophilic trapping of an O-alkyl carbamate
Genet, Cedric,McGrath, Matthew J.,O'Brien, Peter
, p. 1376 - 1382 (2007/10/03)
Seven (+)-sparteine-like diamines and (-)-sparteine were evaluated in the diamine-mediated asymmetric lithiation-trapping of an O-alkyl carbamate. The (+)-sparteine-like diamines (≥98: 2 er by chiral shift NMR spectroscopy) were prepared from (-)-cytisine
New chiral amine ligands in the desymmetrization of prochiral phosphine boranes
Johansson, Magnus J.,Schwartz, Lennart,Amedjkouh, Mohamed,Kann, Nina
, p. 3531 - 3538 (2007/10/03)
P-chirogenic phosphine ligands can be prepared via desymmetrization of prochiral phosphine boranes using s-BuLi?(-)-sparteine complexes. One limitation of this method, however, has been that (+)-sparteine is not easily accessible. Herein, we show that der
