Sodium Iodide → 4-Acetamido-3-iodobenzaldehyde

To a solution of N-(4-formyl-phenyl)-acetamide (1.25 g, 7.67 mmol) in trifluoroacetic acid (70 mL) was slowly added thallium(III)trifluoroacetate (5.00 g, 9.20 mmol). The reaction mixture was stirred at room temperature for 30 minutes. Then, a solution of sodium iodide (1.19 g, 7.95 mmol) in water (10 mL) was added slowly. The color changed to dark purple and a lot of solid was formed. Stirring continued at room temperature for 16 hours. Solvent was evaporated to half of the volume, and water (50 mL) was added. The pH was adjusted to approximately 13 with 4 N NaOH solution. The mixture was extracted with ethyl acetate (2×100 mL). The organic phase was dried over anhydrous Na2SO4 and concentrated on a rotary evaporator. The solid obtained was washed with ethyl acetate (2×5 mL), ether (2×10 mL), and dried under vacuum to give N-(4-formyl-2-iodo-phenyl)-acetamide as an off-white solid. Yield: 0.760 g (34%).

1. customwas formed
2. stirringStirring
3. waitcontinued at room temperature for 16 hours
4. customSolvent was evaporated to half of the volume, and water (50 mL)
5. additionwas added
6. extractionThe mixture was extracted with ethyl acetate (2×100 mL)
7. dry with materialThe organic phase was dried over anhydrous Na2SO4
8. concentrationconcentrated on a rotary evaporator
9. customThe solid obtained
10. washwas washed with ethyl acetate (2×5 mL), ether (2×10 mL)
11. customdried under vacuum

ORD-Eintrag

ord-cf34b0724796436bb6658bfd9bc72a2e

Quelldatensatz

uspto-grants-2016_01

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US09238640B2