A. Alexakis et al., Novel biphenol phosphoramidite ligands for the enantioselective copper catalyzed conjugate addition of dialkyl zincs, SYNLETT, (9), 2001, pp. 1375-1378
Phosphoramidite ligands, based on a chiral amine and atropoisomerically fle
xible biphenols, induce high enantioselectivities (ee's up to 98%) in the c
opper-catalyzed conjugate addition of dialkyl zinc reagents to a variety of
Michael acceptors.