1: benzophenone With ytterbium in tetrahydrofuran; N,N,N',N',N'',N''-hexamethylphosphoric triamide T=20°C; 2: N-benzotriazol-1-ylmethyl-3-methyl-aniline in tetrahydrofuran; N,N,N',N',N'',N''-hexamethylphosphoric triamide T=20°C; 14 h;

in methanol; water 3 h; Heating;