反应详情

100% Hydrazine hydrate (20 ml.) was added to a stirred solution of N-(fur-2-ylmethoxy)phthalimide (42.0 g.) in methylene chloride (600 ml.). A copious precipitate formed immediately, and the mixture was stirred for 45 min. 5N Ammonium hydroxide solution (500 ml.) was added to dissolve the precipitate, the two layers were separated, and the aqueous layer was washed twice with methylene chloride. The combined methylene chloride extracts were washed (saturated brine) and dried. Methylene chloride was evaporated off, and the residual liquid was dissolved in ether (250 ml.). Dry hydrogen chloride was passed into this solution for one hour. The precipitated solid was filtered off, washed with ether, dried, and recrystallised from isopropanol to give fur-2-ylmethoxyamine hydrochloride (12.89 g., 50%), m.p. 135°-136° (decomp) τ values (DMSO-d6) include 4.87 (CH2), 2.20,. 3.27, 3.44 (furyl protons).

1. customA copious precipitate formed immediately
2. dissolutionto dissolve the precipitate
3. customthe two layers were separated
4. washthe aqueous layer was washed twice with methylene chloride
5. washThe combined methylene chloride extracts were washed (saturated brine)
6. customdried
7. customMethylene chloride was evaporated off
8. dissolutionthe residual liquid was dissolved in ether (250 ml.)
9. waitDry hydrogen chloride was passed into this solution for one hour
10. filtrationThe precipitated solid was filtered off
11. washwashed with ether
12. customdried
13. customrecrystallised from isopropanol