tin(II) trifluoromethanesulfonate; N-(2-pyrrolidinylmethyl)piperidine in dichloromethane T=-78°C; 1 h;

tin(II) trifluoromethanesulfonate; (S)-1-methyl-2-lt;(piperidin-1-yl)-methylgt;pyrrolidine in dichloromethane T=-78°C; 1 h; further conditions; further chiral diamines; Product distribution;