Acetic Acid → 6-Iodo-2,3-dihydro-1H-indole
Reaction equation
[I:1][C:2]1[CH:3]=[C:4]2[C:8](=[CH:9][CH:10]=1)[NH:7][CH:6]=[CH:5]2.CC(O)=O>>[I:1][C:2]1[CH:3]=[C:4]2[C:8](=[CH:9][CH:10]=1)[NH:7][CH2:6][CH2:5]2Participants
3
Procedure
To a solution of 5-iodoindole (0.2 g; 0.82 mmol) in AcOH (5 ml) NaBH3CN (0.2 g; 3.8 mmol) was added at ˜10° C. under N2. After stirring for 1 h at room temperature the solvent was removed in vacuo and the residue was diluted to 30 ml with Et2O and washed with 1 N NaOH (5 ml), H2O (2×5 ml), brine, dried over anhydrous MgSO4 and filtered. The filtrate was evaporated to dryness under reduced pressure to give the title compound (0.2 g; 99%), which was used in next step without further purification. 1H-NMR (CDCl3) 7.35 (s, 1H); 7.25 (d, 1H, J=8.15 Hz); 6.43 (d, 1H, J=8.15 Hz); 5.21 (bs, 1H); 3.54 (t, 2H, J=8.36 Hz); 2.99 (t, 2H, J=8.36 Hz).
Workup
- customwas removed in vacuo
- additionthe residue was diluted to 30 ml with Et2O
- washwashed with 1 N NaOH (5 ml), H2O (2×5 ml), brine