反应详情

2-Phenylacetyl chloride (0.032 ml) was dissolved in acetonitrile (3 ml) under a nitrogen atmosphere, and then potassium thiocyanate (46.6 mg) was added thereto at 60° C., followed by stirring at the same temperature for 2 hrs. The reaction mixture was cooled down to room temperature, and then ethyl acetate and a saturated aqueous solution of sodium hydrogencarbonate were added thereto, followed by stirring for 30 min. The organic layer was separated, washed with a saturated aqueous solution of sodium hydrogencarbonate, water and brine in this order, and dried over anhydrous sodium sulfate. The solvent was evaporated to give a residue, to which was added toluene (1 ml)-ethanol (1 ml) to prepare a solution. 3-[4-(4-Amino-2-fluorophenoxy)pyridin-2-yl]-1-methyl-1-(1-methylpiperidin-4-yl)urea (40.0 mg) was dissolved in ethanol (1 ml) under a nitrogen atmosphere, and then D-10-camphorsulfonic acid (24.9 mg) was added thereto, followed by stirring for 5 min. To the reaction mixture was added the solution of 2-phenylacetyl isothiocyanate in toluene-ethanol (2 ml) synthesized above, followed by stirring at room temperature for 30 min. The reaction mixture was partitioned between ethyl acetate and a saturated aqueous solution of sodium hydrogencarbonate. The organic layer was washed with a saturated aqueous solution of sodium hydrogencarbonate, water and brine in this order, and dried over anhydrous sodium sulfate. The solvent was evaporated to give a residue, which was then purified by silica gel column chromatography (FUJI Silysia NH, eluent; ethyl acetate). Fractions containing the target compound were concentrated to give a residue, to which diethyl ether (0.5 ml)-hexane (1.0 ml) was then added to suspend. The solid was filtered off and dried under aeration to provide the titled compound (10.3 mg, 17.5%) as a white solid.

1. customat 60° C.
2. stirringby stirring for 30 min
3. customThe organic layer was separated
4. washwashed with a saturated aqueous solution of sodium hydrogencarbonate, water and brine in this order
5. dry with materialdried over anhydrous sodium sulfate
6. customThe solvent was evaporated
7. customto give a residue
8. customto prepare a solution
9. stirringby stirring for 5 min
10. customsynthesized above,
11. stirringby stirring at room temperature for 30 min
12. customThe reaction mixture was partitioned between ethyl acetate
13. washThe organic layer was washed with a saturated aqueous solution of sodium hydrogencarbonate, water and brine in this order
14. dry with materialdried over anhydrous sodium sulfate
15. customThe solvent was evaporated
16. customto give a residue, which
17. customwas then purified by silica gel column chromatography (FUJI Silysia NH, eluent; ethyl acetate)
18. additionFractions containing the target compound
19. concentrationwere concentrated
20. customto give a residue
21. filtrationThe solid was filtered off
22. customdried under aeration