Hydrochloric Acid → 5-Iodo-3-methyl-9H-pyrido[2,3-b]indole-7-carbonitrile

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Reaction Conditions

Reaction Steps

Compound 124 (118 mg, 0.53 mmol) was dissolved in HOAc (2 mL) with H2O (1 mL), and the solution stirred at 0° C. Concentrated HCl (120 μL) in H2O (120 mL) was added, and the reaction stirred for 5 min. Sodium nitrite (54 mg, 0.78 mmol) in H2O (120 μL) was added dropwise, and the red solution stirred for 10 min. A solution of iodine (10 mg) and potassium iodide (129 mg, 0.78 mmol) in H2O (300 μL) was added dropwise, and the brown frothy solution stirred for 30 min at 0° C. and then 30 min while warming to r.t. The reaction was diluted with H2O (5 mL) and extracted with CHCl3. Organics were dried (MgSO4) and concentrated in vacuo. Purification by silica gel chromatography gave 108 mg (61%) of the title compound as a faintly yellow solid. MS (ES) [m+H] calc'd for C13H8IN3, 334; found 334.

Provenance & Evidence