反应详情

3.15 g (6.84 mmol) of 4-(1-acetylpiperidin-4-yl)-5-diisopropylphosphono-2-formylamino-pent-3-enoic acid ethyl ester are dissolved in 17 ml of dichloromethane, and 3.54 ml (27.3 mmol) of trimethylbromosilane are added dropwise at room temperature. The mixture is left to stand at room temperature for 16 hours, 17 ml of ethanol are added dropwise, the mixture is left to stand for a further 18 hours and is concentrated by evaporation in a rotary evaporator, the residue is dissolved in 12 ml of ethanol, and a mixture of 3 ml of propylene oxide and 3 ml of ethanol is added. A suspension forms, which is stirred for a further 2 hours at room temperature and for 2 hours with ice cooling and is then filtered with suction. 2-amino-4-(1-acetylpiperidin-4-yl)-5-phosphono-pent-3-enoic acid ethyl ester having a melting point of 225° (decomp.) is obtained.

1. waitThe mixture is left
2. waitthe mixture is left
3. waitto stand for a further 18 hours
4. concentrationis concentrated by evaporation in a rotary evaporator
5. dissolutionthe residue is dissolved in 12 ml of ethanol
6. additiona mixture of 3 ml of propylene oxide and 3 ml of ethanol
7. additionis added
8. filtrationis then filtered with suction