N,N,N',N',N'',N''-hexamethylphosphoric triamide; di-n-butylchlorotin hydride in tetrahydrofuran T=0 - 20°C; Reduction; Amination; 6 h;

1: With silver trifluoromethanesulfonate; (R)-1,1'-bis(diphenylphosphino)-2,2'-binapthyl T=20°C; 36 h; Sealed tube; 2: With borane-THF T=-20°C; 2 h; Sealed tube;