反应详情

3.8 g (21.4 mmol) of the compound from Example 33A and 7.4 ml (6.3 g, 42.8 mmol) dimethylformamide diethyl acetal are stirred at a bath temperature of 100° C. for 16 h. For working up, the cooled reaction solution is concentrated on a rotary evaporator and the residue is dried in vacuo.

1. customthe cooled reaction solution
2. concentrationis concentrated on a rotary evaporator
3. customthe residue is dried in vacuo