Iodine → 5-iodo-N-methoxy-N-methyl-1H-indazole-3-carboxamide

Participants

Reaction Steps

To the N-methoxy-N-methyl-1H-indazole-3-carboxamide (IX) (20 g, 97.4 mmol) in 1 L DCM was added bis(trifluoroacetoxy)iodobenzene (46 g, 107 mmol) followed by portionwise addition of iodine (14.84 g, 58.5 mmol) at r.t. After 1 hour, 600 mL of saturated NaHSO3 was added and a solid began to precipitate which was filtered and rinsed with excess DCM. The filtrate was washed with brine, dried over MgSO4, concentrated and the remaining solid was triturated with a minimal amount of DCM. The combined solids were dried under vacuum over KOH to produce 5-iodo-N-methoxy-N-methyl-1H-indazole-3-carboxamide (X) as a white solid (23.2 g, 70 mmol, 72% yield).

Provenance & Evidence