HRID1747154
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
PROCEDURE
实验过程
A solution of the product of Step C (7.97 g, 15.5 mmol, 1 eq), paraformaldehyde (9.28 g, 310 mmol, 20 eq) and p-toluenesulfonic acid hydrate (2.94 g, 15.5 mmol, 1 eq) in toluene (300 mL) was heated to 130° C. for 18 hours in a flask equipped with a Dean-Stark trap. The solution was cooled to rt and concentrated. Purification by chromatography (200 g column) eluting with 25 to 60 to 100% ethyl acetate/heptane afforded the product of Step D. Calculated for C25H21F3N2O5: 487.1 (M+1). found: 487.2.
WORKUP
后处理
- customequipped with a Dean-Stark trap
- concentrationconcentrated
- customPurification by chromatography (200 g column)
- washeluting with 25 to 60 to 100% ethyl acetate/heptane