126. Highly selective additions of hydride and organolithium nucleophiles to helical carbenium ions
     Joyram Guin, Céline Besnard, Philip Pattison, Jérôme Lacour
     Chem. Sci. 2011, 2, 425-428

Unsymmetrical cationic [4]helicenes react with hydride or organolithium reagents and the two diastereotopic faces can be discriminated with high efficiency (dr up to and higher than 49:1)

DOI : 10.1039/C0SC00525H 

archive ouverte unige:14469