1: [TBPY-5-12/11]-1-phenylmethyl-3,3,3',3'-tetrakis(trifluoromethyl)-1,1'-spirobi[3H,2,1,λ5-benzoxaphosphole] With 18-crown-6 ether; potassium hydride in tetrahydrofuran T=20°C; 0.333333 h; 2: benzaldehyde in tetrahydrofuran T=20°C; 6 h; Further stages. Title compound not separated from byproducts.;

1: [TBPY-5-12/11]-1-phenylmethyl-3,3,3',3'-tetrakis(trifluoromethyl)-1,1'-spirobi[3H,2,1,λ5-benzoxaphosphole] With n-butyllithium in tetrahydrofuran 2: benzaldehyde in tetrahydrofuran T=20°C; 6 h; 3: With hydrogen cation

1: 1,) n-BuLi 2: 80 percent / LiBH4 3: t-BuOK / tetrahydrofuran / -40 °C View Scheme