反应详情

A solution of the compound from Example 52 (1 g, 4.1 mmol) and diphenylphosphorylazide (1.25 g, 4.5 mmol) in triethylamine (0.6 g) and 30 ml toluene was heated at 110° C. for 30 minutes. Workup and silica gel chromatography gave the title compound (0.65 g, 66%) as a yellow syrup.