反应详情
EQUATION
反应方程式
REACTANTS
反应物
PRODUCTS
生成物
AUXILIARIES
试剂、催化剂与溶剂
CONDITIONS
反应条件
- 温度
- 10 °C
PROCEDURE
实验过程
A reaction vessel is charged with 2-hydrazinoadenosine (450 g) and absolute ethanol (11376 g). HCl (7.47 g) and ethyl 2-formyl-3-oxopropionate (1557 g) are added. The mixture is heated to reflux and sampled until the level of residual 2-hydrazinoadenosine in the mixture is not more than 0.50% and the level of the compound of formula (3) is not more than 2.5%. The mixture is slowly cooled to approximately 10° C. The product, the compound of formula (4) is isolated by filtration and washed with absolute ethanol (5121 g). The product is dried under vacuum at up to 40° C. until residual ethanol is not more than 5000 ppm to give ethyl (2E)-3-({9-[(4S,2R,3R,5R)-3,4-dihydroxy-5-(hydroxymethyl)oxolan-2-yl]-2-[4-(ethoxycarbonyl)-pyrazolyl]purin-6-yl}amino)-2-formylprop-2-enoate.
WORKUP
后处理
- temperatureThe mixture is heated
- temperatureto reflux