4-Iodo-2-methoxynicotinaldehyde → HCID 59762244, compound

Participants

Reaction Conditions

Reaction Steps

Pd/C (250 mg) was added to a solution of crude 5-amino-6-nitro-2-(3-(pyrrolidin-1-yl)propyl)isoindoline-1,3-dione in MeOH/AcOH (100 mL/5 mL) and hydrogenated for 5 h. The mixture was filtered through Celite and the filtrate was treated with 4-iodo-2-methoxynicotinaldehyde (3.2 g, 12.07 mmol) and stirred at ambient temperature open to air for 12 h and at 80° C. for 5 h. The reaction mixture was cooled to ambient temperature and concentrated in vacuo to dryness. Purification by flash chromatography gave the title 5,6-diamino-2-(3-(pyrrolidin-1-yl)propyl)isoindoline-1,3-dione as a solid (2.02 g, 32% through 4 steps). 1H NMR (MeOD): δ 8.15 (s, 2H), 8.01-8.08 (t, J=3 Hz 1H), 7.64 (t, J=3 Hz, 1H), 3.89-3.78 (m, 2H), 3.41-3.22 (m, 2H), 2.95-2.81 (m, 6H), 2.15-1.82 (m, 7H). ESMS (m/z) 532 (M+H)+.

Provenance & Evidence