Hydrazine hydrate (1:1) → 2-Hydrazinyl-4-iodopyridine
Reaction equation
F[C:2]1[CH:7]=[C:6]([I:8])[CH:5]=[CH:4][N:3]=1.O.[NH2:10][NH2:11]>C(O)C>[NH:10]([C:2]1[CH:7]=[C:6]([I:8])[CH:5]=[CH:4][N:3]=1)[NH2:11]Participants
4
Reactant 2
Product 1
Reagents, catalysts & solvents 1
Conditions
- Temperature
- 40 °C
Procedure
To a solution of 2-fluoro-4-iodopyridine (7.00 g, 31.4 mmol) in ethanol (60 mL) was added hydrazine monohydrate (15.23 mL, 314 mmol). The mixture was stirred at 40° C. for 15 h then concentrated. The resulting residue was triturated with 1:1 hexanes/ether. The remaining solid was further triturated with water then dried under vacuum to give the title compound (6.6 g) as a tan solid. LCMS m/z=235.9 [M+H]+. 1H NMR (400 MHz, DMSO-d6) δ 4.15 (s, 2H), 6.86 (dd, J=5.2, 1.5 Hz, 1H), 7.13 (d, J=1.5 Hz, 1H), 7.56 (s, 1H), 7.67 (d, J=5.3 Hz, 1H).
Workup
- concentrationthen concentrated
- customThe resulting residue was triturated with 1:1 hexanes/ether
- customThe remaining solid was further triturated with water
- customthen dried under vacuum
Sources & evidence
- ORD record
- ord-0ad7441b32dd4ee2ad5370cf279af64a
- Source dataset
- uspto-grants-2014_07
- Patent number
- US08778950B2
Reaction notes
Loading…