反应详情

A mixture of 1-(4-chlorobutyl)-2-ethyl-2H-pyrazolo[3,4-c]quinolin-4-amine (3 g, prepared as described in Example 19), platinum (IV) oxide (3 g), and trifluoroacetic acid (50 mL) was placed under hydrogen pressure (50 psi, 3.4×105 Pa) on a Parr shaker for 2 days. The reaction mixture was filtered through a layer of CELITE filter agent and the filter cake was rinsed with dichloromethane. The filtrate was concentrated under reduced pressure. The residue was made basic (pH 14) by the addition of 50% sodium hydroxide and then extracted with chloroform. The extract was dried over sodium sulfate and then purified by chromatography on a HORIZON HPFC system (eluting with chloroform/CMA in a gradient from 100:0 to 70:30) to provide 1.75 g of 1-(4-chlorobutyl)-2-ethyl-6,7,8,9-tetrahydro-2H-pyrazolo[3,4-c]quinolin-4-amine as a light yellow solid.

1. customfor 2 days
2. filtrationThe reaction mixture was filtered through a layer of CELITE filter agent
3. washthe filter cake was rinsed with dichloromethane
4. concentrationThe filtrate was concentrated under reduced pressure
5. additionby the addition of 50% sodium hydroxide
6. extractionextracted with chloroform
7. dry with materialThe extract was dried over sodium sulfate
8. custompurified by chromatography on a HORIZON HPFC system (
9. washeluting with chloroform/CMA in a gradient from 100:0 to 70:30)