tert.-butylhydroperoxide; iodine; sodium hydrogencarbonate in N,N-dimethyl-formamide T=70°C; 10 h;

1: naphthalene-2-carboxaldehyde oxime With trifluorormethanesulfonic acid; silica gel in toluene T=50°C; 0.5 h; 2: phenylacetylene in toluene T=70°C; 3.5 h; 3: With CuCl2·2H2O; lithium chloride monohydrate; oxygen; 2,3-dicyano-5,6-dichloro-p-benzoquinone in 1,4-dioxane; propan-1-ol; toluene T=60°C; P=9750.98 Torr; 4 h;

[Ni0(1,5-cyclooctadiene)2]; caesium carbonate; dcype in 1,4-dioxane T=120°C; 12 h; Inert atmosphere;

2: POCl3 View Scheme

2: POCl3 View Scheme