1-ethyl-piperidine; tin(II) trifluoromethanesulfonate; (S)-1-methyl-2-lt;(piperidin-1-yl)-methylgt;pyrrolidine in dichloromethane T=-95°C; 0.5 h; Yield given;

methanol; (S)-3,3'-bis(4''-tert-butylphenyl)-2,2'-(2,2-bisbromo-2-stannopropane-1,3-diyl)-1,1'-binaphthyl; sodium methylate in toluene T=40°C; 1.5 h; Inert atmosphere; optical yield given as percent eediastereoselective reaction;