反应详情

3.8 g (21.4 mmol) of the compound from Example 1A and 7.4 ml (6.3 g, 42.8 mmol) of N,N-dimethylformamide diethyl acetal are stirred at a bath temperature of 100° C. for 16 h. For work-up, the cooled reaction solution is concentrated on a rotary evaporator and the residue is dried under reduced pressure. Yield: 5.0 g (73% pure, 73% of theory)

1. customFor work-up, the cooled reaction solution
2. concentrationis concentrated on a rotary evaporator
3. customthe residue is dried under reduced pressure