sodium tetrahydroborate; N,N,N',N,-tetramethylethylenediamine; palladium diacetate in tetrahydrofuran T=20°C; 3 h; Inert atmosphere; Reagent/catalystTime;

Multi-step reaction with 2 steps 1.1: n-BuLi / diethyl ether; hexane / -70 °C1.2: diethyl ether; hexane / -70 - 20 °C1.3: 67 percent / aq. HCl / diethyl ether; hexane2.1: 79 percent / dichlorodicyanoquinone / benzene / 5.5 h