[C:1]([C:4]1[C:11]([OH:12])=[CH:10][C:7]([C:8]#[N:9])=[C:6]([CH3:13])[CH:5]=1)(=[O:3])[CH3:2].[I:14]N1C(=O)CCC1=O>C(O)(=O)C.C(OCC)(=O)C>[C:1]([C:4]1[CH:5]=[C:6]([CH3:13])[C:7]([C:8]#[N:9])=[C:10]([I:14])[C:11]=1[OH:12])(=[O:3])[CH3:2]The 4-acetyl-5-hydroxy-2-methylbenzonitrile (6.7 g, 38 mmol) was dissolved in acetic acid (80 mL) and the N-iodosuccinimide (10.0 g, 46 mmol) was added. The reaction was heated to 80° C. in an oil bath and monitored by LC/MS. After heating for 4 hrs the reaction was complete. This was allowed to cool and was concentrated in vacuo to give a dark oil. The oil was taken up in ethyl acetate and washed with water, sodium bicarbonate (3×, until remained slightly basic), brine, dried over magnesium sulfate and concentrated to give the crude product as a dark oil. The product was purified by FCC on silica gel eluting hexane:ethyl acetate gradient to give 4-acetyl-3-hydroxy-2-iodo-6-methylbenzonitrile as pale yellow solid (7.2 g, 62%). LCMS calculated for C10H9INO2(M+H)+: m/z=301.9; found: 301.9.
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