1: bisphenyl-(pyridin-2-yl)phosphine With n-butyllithium; 2-(dimethylamino)-ethanol in hexane T=0°C; Metallation; 1 h; 2: pyridine in tetrahydrofuran T=-78 - 20°C; Arylation; 1.5 h;

1: 88 percent / aq. potassium hexacyanoferrate(III), sodium hydroxide / 1.) 10 deg C, 2 h, 2.) RT, 15 h 2: 32 percent / pentachlorophosphorus, phosphoryl trichloride / 3 h / 130 °C 3: 1.) lithium / 1.) THF, 1 h, 2.) THF, RT, 15 h View Scheme

1: 32 percent / pentachlorophosphorus, phosphoryl trichloride / 3 h / 130 °C 2: 1.) lithium / 1.) THF, 1 h, 2.) THF, RT, 15 h View Scheme

lithium 1.) THF, 1 h, 2.) THF, RT, 15 h; Yield given. Multistep reaction;