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
- 50 °C
PROCEDURE
实验过程
The solution of 5.64 g (7.58 mmol) of the compound, presented according to Example LE3d, in 150 ml of allyl alcohol is mixed with 9.1 ml of a 1 M solution of sodium allyl alcoholate in allyl alcohol, and it is stirred for 2.5 hours at 50° C. It is concentrated by evaporation, mixed with water, extracted several times with dichloromethane, the combined organic extracts are washed with saturated sodium chloride solution and dried on magnesium sulfate. The residue that is obtained after filtration and removal of the solvent is purified by chromatography on fine silica gel, and 1.78 g (2.44 mmol, 32%) of the title compound as well as 1.87 g (2.43 mmol, 32%) of (2R,3S,4S,5R,6S)-3,4,5-tris-(tert-butyl-dimethyl-silanyloxy)-6-(2-[1,3]dioxolan-2-yl-4-nitro-phenoxy)-tetrahydro-pyran-2-carboxylic acid allyl ester are isolated.
WORKUP
后处理
- concentrationIt is concentrated by evaporation
- additionmixed with water
- extractionextracted several times with dichloromethane
- washthe combined organic extracts are washed with saturated sodium chloride solution
- customdried on magnesium sulfate
- customThe residue that is obtained
- filtrationafter filtration and removal of the solvent