反应详情

A solution of 1-(3-nitropyridin-4-yl)-4-(tetrahydrofuran-3-yl)piperazine (316 mg, 1.13 mmol) in MeOH (15 mL), Pd on C (10%, wet, Degussa) (120 mg) was stirred overnight at RT under an hydrogen atmosphere (balloon). The mixture was filtered through a Celite pad and concentrated under reduced pressure. The crude was redissolved in MeOH and loaded into a MeOH pre-washed SCX column, rinsed with MeOH and the product was released with methanolic ammonia. The ammonia extracts were concentrated under reduced pressure to give 4-(4-(tetrahydrofuran-3-yl)piperazin-1-yl)pyridin-3-amine as a solid which was used in next step without further purification. (300 mg, purity 77%, yield 82%). MS (ES+) 249.2.

1. filtrationThe mixture was filtered through a Celite pad
2. concentrationconcentrated under reduced pressure
3. dissolutionThe crude was redissolved in MeOH
4. washrinsed with MeOH
5. concentrationThe ammonia extracts were concentrated under reduced pressure