反应详情

温度

0 °C

Dissolve [4-(8-fluoro-2-methoxy-5H-6-oxa-chrysen-5-yl)-phenyl]-(2-piperidin-1-yl-ethyl)-carbamic acid tert-butyl ester in dichloromethane (25 mL). Add a 1.0 M solution of hydrogen chloride in ether (5 mL). Concentrate in vacuo. Redissolve in dichloromethane (20 mL). Cool to 0° C. Add boron tribromide (0.238 mL, 2.52 mmol). After 3 hrs dilute with saturated aqueous sodium bicarbonate (10 mL) and methanol (10 mL). Separate the organic layer and wash the aqueous layer twice with dichloromethane. Combine the organics and dry over magnesium sulfate. Filter and concentrate in vacuo. Purify the residue by column chromatography using a silica gel column eluting with a linear gradient beginning with dichloromethane and ending with 4:1 dichloromethane:methanol. Combine the product containing fractions and add 1.0 M hydrogen chloride in ether (2 mL). Concentrate in vacuo to isolate the title compound: mass spectrum (ion spray) m/z=469.2 (M+H). Purify the mixture by chiral chromatography (conditions A). The two isomers eluted with retention times of 4.02 and 5.46 minutes.

1. concentrationConcentrate in vacuo
2. dissolutionRedissolve in dichloromethane (20 mL)
3. customSeparate the organic layer
4. washwash the aqueous layer twice with dichloromethane
5. dry with materialdry over magnesium sulfate
6. filtrationFilter
7. concentrationconcentrate in vacuo
8. customPurify the residue by column chromatography
9. washeluting with a linear gradient
10. additioncontaining fractions
11. additionadd 1.0 M hydrogen chloride in ether (2 mL)
12. concentrationConcentrate in vacuo