反应详情

(2-Fluoro-biphenyl-4-yl)-methanol (0.75 gm, 3.7 mmole) was dissolved in 20 ml DCM, cooled using ice/methanol, triethylamine (0.55 ml, 4.0 mmole) was added followed by methanesulfonylchloride (0.3 ml, 4.0 mmole) added drop wise over 5 minutes. The reaction was allowed to stir at room temperature till the TLC indicated consumption of the starting material (2 hrs), after completion of the reaction, the reaction mixture was washed with water, saturated NaHCO3 solution, and saturated NaCl solution, dried using Na2SO4 and evaporated to produce yellow oil, the oil produced was dissolved in 25 ml of 70% ethanol, KCN (0.4 gm, 6 mmole) was then added and it was heated under reflux overnight. Ethanol was evaporated; solid was washed with 50 ml water and filtered. The solid was dissolved in 20 ml of ethanol, then 20 ml of conc. H2SO4 was added, and was refluxed overnight; the solution was allowed to cool to room temperature, poured to 200 ml of crushed ice, the solid was collected by vacuum filtration, suspended in 25 ml of NaOH 30%, heated at reflux temperature for 24 hrs, cooled to room temperature, washed with DCM and ethyl acetate. The aqueous layer was acidified with conc. HCl, extracted with ethyl acetate, evaporated; the residue was crystallized from isopropanol-water to give white solid (0.15 gm, 18% in 3 steps) H1-NMR INOVA-500 (DMSO d6) δ 3.672 (s, 2H), 7.191-7.254 (m, 2H), 7.389-7.560 (m, 6H), 12.494 (s, 1H).

1. temperaturecooled
2. additionwas added
3. additionadded drop wise over 5 minutes
4. customconsumption of the starting material (2 hrs)
5. customafter completion of the reaction
6. washthe reaction mixture was washed with water, saturated NaHCO3 solution, and saturated NaCl solution
7. customdried
8. customevaporated
9. customto produce yellow oil
10. customthe oil produced
11. temperatureit was heated
12. temperatureunder reflux overnight
13. customEthanol was evaporated
14. washsolid was washed with 50 ml water
15. filtrationfiltered
16. dissolutionThe solid was dissolved in 20 ml of ethanol
17. addition20 ml of conc. H2SO4 was added
18. temperaturewas refluxed overnight
19. temperatureto cool to room temperature
20. additionpoured to 200 ml of crushed ice
21. filtrationthe solid was collected by vacuum filtration
22. temperatureheated
23. temperatureat reflux temperature for 24 hrs
24. temperaturecooled to room temperature
25. washwashed with DCM and ethyl acetate
26. extractionextracted with ethyl acetate
27. customevaporated
28. customthe residue was crystallized from isopropanol-water
29. customto give white solid (0.15 gm, 18% in 3 steps) H1-NMR