in tetrahydrofuran

1: (S*,S*)-α,α'-dimethyldibenzylamine With n-butyllithium in tetrahydrofuran; hexane T=-78 - -30°C; Inert atmosphere; 2: 2-chlorodibenzolt;d,fgt;-1,3,2-dioxaphosphepan in tetrahydrofuran; hexane T=-78 - 20°C; Inert atmosphere;