反应 #3349669
相关文献 (1)
openreactiondata ↗doi:10.6084/m9.figshare.5104873.v1; patent:US04161594
反应条件: temp:50.01; pressure:0.00; stir:; See reaction.notes.procedure_details.
实验步骤: A mixture of 995.0 g of 5-isopropylhydantoin (7 mols), 2000 ml of dimethylformamide and 14.8 g of lithium chloride is stirred at 50° C. 1220 g of propene oxide (21 mols) are slowly added dropwise over the course of 6 hours. Thereafter the temperature is gradually raised at 70° C. and after a total of 15 hours the reaction mixture is allowed to cool. It is adjusted to pH = 7 with a few drops of 2 N H2SO4 and the pale yellow solution is filtered. The solution is completely concentrated at 90° C. bath temperature on a rotational evaporator under a waterpump vacuum and is subsequently treated at 90° C./0.1 mm Hg until constant weight is reached. 1654.5 g of a pale yellow highly viscous product (91.7% of theory) are obtained. Thereafter the temperature is gradually raised at 70° C. after a total of 15 hours to cool the pale yellow solution is filtered The solution is completely concentrated at 90° C. bath temperature on a rotational evaporator under a waterpump vacuum is subsequently treated at 90° C./0.1 mm Hg until constant weight 1654.5 g of a pale yellow highly viscous product (91.7% of theory) are obtained
来源 ID: ord-50303a5f2b1542f0b179e4164ad806e7