1: hydrogen, Rh(acac)(CO)2, (R)-2-(diphenylphosphino)-1,1'-binaphthalen-2'-yl (S)-1,1'-binaphthalene-2,2'-diyl phosphite / benzene / 72 h / 60 °C / 76000 Torr / other reagent: (R)-2-(diphenylphosphino)-1,1'-binaphthalen-2'-yl (S)-3,3'-dimethyl-1,1'-binaphthalene-2,2'-diyl phosphite 2: borane-THF / tetrahydrofuran / 1.) 0 deg C, 2 h, 2.) room temperature, overnight View Scheme

di-tert-butyl dicarbonate

carbon tetrabromide; triphenylphosphine in dichloromethane T=0°C; 5 h; Inert atmosphere;