反应详情

1.4 g (7.97 mmol) of 6-(4-allylpiperazin-1-yl)pyridin-3-ylamine from Example 1.2 and 1.74 g (7.97 mmol) of 4-isopropylbenzenesulfonyl chloride were dissolved in 30 ml of tetrahydrofuran at room temperature. 3.3 ml (23.91 mmol) of triethylamine were then added to this mixture. After that, the reaction mixture was stirred overnight at room temperature. After the solvent had been evaporated to dryness, water was added to the residue. The aqueous reaction mixture was made acid with 1N hydrochloric acid and extracted twice with diethyl ether. After that, the aqueous phase was made alkaline (pH 9-10) with a 1N aqueous solution of sodium hydroxide and then extracted twice with diethyl ether. After the combined organic phases had been dried over sodium sulfate, the drying agent had been filtered off and the solvent had been evaporated down to dryness, the resulting residue was chromatographed on silica gel using cyclohexane/ethyl acetate (45:55% to 100% ethyl acetate). The filtrate was evaporated down to dryness. The resulting residue was thoroughly stirred in 10 ml of heptane, filtered off in suction and dried, with 1.93 g (61% of theory) of the title compound being obtained.

1. customAfter the solvent had been evaporated to dryness, water
2. additionwas added to the residue
3. extractionextracted twice with diethyl ether
4. extractionextracted twice with diethyl ether
5. dry with materialAfter the combined organic phases had been dried over sodium sulfate
6. filtrationthe drying agent had been filtered off
7. customthe solvent had been evaporated down to dryness
8. customthe resulting residue was chromatographed on silica gel
9. customThe filtrate was evaporated down to dryness
10. stirringThe resulting residue was thoroughly stirred in 10 ml of heptane
11. filtrationfiltered off in suction
12. dry with materialdried, with 1.93 g (61% of theory) of the title compound
13. custombeing obtained