反应详情

The product from Example 18 is dissolved in trifluoroacetic acid (170 ml) and left at room temperature for 1 h 45 min. Subsequently, the mixture is codistilled five times with toluene and the product is dried in a desiccator over phosphorus pentoxide/potassium hydroxide for 24 h. Yield: 11.8 g (93%).

1. dry with materialthe product is dried in a desiccator over phosphorus pentoxide/potassium hydroxide for 24 h