T=200°C; 2 h;

1: 92 percent / 4-(Dimethylamino)pyridine (DMAP) / diethyl ether / 1.) -20 deg C, 30 min, 2.) 15 h, room temperature 2: 58 percent / 2 h / 200 °C View Scheme

bis(acetylacetonate)nickel(II); Schwartz's reagent 2.) THF, -35 deg C, multistep, other reagents; Product distribution;