1: 2-methoxy-5-bromo-pyridine With n-butyllithium in tetrahydrofuran; hexane T=-78°C; 0.5 h; 2: 2-isopropoxy-4,4,5,5-tetramethyl-1,3,2-dioxaborolane in tetrahydrofuran; hexane T=20°C; 1 h;

1: 2-methoxy-5-bromo-pyridine With n-butyllithium; isopropylmagnesium chloride in tetrahydrofuran; hexane T=-2 - 0°C; 0.75 h; Inert atmosphere; 2: 2-isopropoxy-4,4,5,5-tetramethyl-1,3,2-dioxaborolane in tetrahydrofuran; hexane T=0 - 20°C; Inert atmosphere;

tert.-butylnitrite in acetonitrile T=80°C; 2 h;

(iPrPNP)CoCH2SiMe3 in tetrahydrofuran T=80°C; 24 h; Inert atmosphereGlovebox;

1.1: N-bromosuccinmide / acetonitrile / 20 h / Reflux 2.1: n-butyllithium; isopropylmagnesium chloride / tetrahydrofuran; hexane / 0.75 h / -2 - 0 °C / Inert atmosphere 2.2: 0 - 20 °C / Inert atmosphere View Scheme

T=80°C; 3 h;