1: 87 percent / benzene / 4.5 h / Heating 2: 70 percent / benzene / 8 h / Heating 3: 55 percent / Potassiumhydroxide (6percent) / 1.5 h / Heating 4: lead tetraacetate / dimethylsulfoxide; pyridine / 15 h View Scheme

1: 70 percent / benzene / 8 h / Heating 2: 55 percent / Potassiumhydroxide (6percent) / 1.5 h / Heating 3: lead tetraacetate / dimethylsulfoxide; pyridine / 15 h View Scheme

1: 55 percent / Potassiumhydroxide (6percent) / 1.5 h / Heating 2: lead tetraacetate / dimethylsulfoxide; pyridine / 15 h View Scheme

lead(IV) acetate in pyridine; dimethyl sulfoxide 15 h; Yield given. Title compound not separated from byproducts;