Iodine → 3-Iodo-1-methoxynaphthalene

Temperatur

0 °C

50 g of 3-amino-1-methoxynaphthalene was added to 750 mL of 6 N sulfuric acid. The mixture was heated to dissolve the naphthalene and the resulting solution was cooled to 0° C. To the resulting slurry of amine hydrosulfate salt at 0° C. was added a solution of 20 g of sodium nitrite in 30 mL of water. The resulting mixture stirred at 0° C. for 1 hour and was then poured into a solution of 100 g of potassium iodide and 20 g of iodine in 400 mL water. After stirring for 1 hour at room temperature, 250 mL methylene chloride was added. The layers were separated and the aqueous portion was extracted with 3×100 mL methylene chloride. The organic portion was combined with the methylene chloride extracts and was washed with 3×75 mL saturated sodium bisulfite, dried over anhydrous magnesium sulfate, filtered, and stripped. The resulting product was pre-adsorbed onto silica and eluted with hexane. The appropriate fractions were combined, concentrated and the residual oil was further purified by HPLC to yield 15 g of 3-iodo-1-methoxynaphthalene as a yellow oil. The structure was confirmed by NMR.

1. temperatureThe mixture was heated
2. stirringAfter stirring for 1 hour at room temperature
3. customThe layers were separated
4. extractionthe aqueous portion was extracted with 3×100 mL methylene chloride
5. washwas washed with 3×75 mL saturated sodium bisulfite
6. dry with materialdried over anhydrous magnesium sulfate
7. filtrationfiltered
8. washeluted with hexane
9. concentrationconcentrated
10. customthe residual oil was further purified by HPLC

ORD-Eintrag

ord-45091bce8d8d4124bcddaf8e105dd9d8

Quelldatensatz

uspto-grants-1993_09

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US05244771