700 mg (3.3 mmol) of 16 in 20 ml of 2 N HzS04 was cooled to 5'and diazotized with 480 mg (7 mmol) of NaNOz dissolved in 2 ml of H20 at 5O. The solution of diazonium salt was then added dropwise to 10 ml of boiling HzO and the solution was held at reflux for 1 hr and then allowed to cool. The reaction mixture was saturated with NaCl and extracted with CHZC12 (3 X 50 ml). The organic layer was dried (MgS04) and filtered and the solvent evaporated ...
