Evaluation of sparteine-like chiral diamines in the enantioselective lithiation–electrophilic trapping of an O-alkyl carbamate
作者:Cédric Genet、Matthew J. McGrath、Peter O'Brien
DOI:10.1039/b600032k
日期:——
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 (>99 : 1 er by chiral HPLC of N-benzyl cytisine) and two new (+)-sparteine-like diamines containing N-CD3 substituents were included as part of