(1R,2R)-(+)-1,2-diphenylethylenediamine; potassium tert-butylate; cyclohexanone; [Ru(II)(η6-benzene)(μ-Cl)Cl]2; (R)-1,1'-bis(diphenylphosphino)-2,2'-binapthyl in tetrahydrofuran T=60°C; 20 h;